CN114218647A - Wall length design method of shear wall - Google Patents
Wall length design method of shear wall Download PDFInfo
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Abstract
The invention belongs to the field of shear walls, and discloses a wall length design method of a shear wall, which comprises the steps of constructing the relationship between the net wall length and the longitudinal steel bar spacing of different types of shear walls; determining the clear wall length ranges of different types of shear walls; determining the same value of the longitudinal steel bar spacing according to the relation between the clear wall length and the longitudinal steel bar spacing of different types of shear walls and the clear wall length range; determining standard common wall lengths of different types of shear walls according to the same value of the longitudinal steel bar spacing; and determining the standard common wall length of the prefabricated shear wall according to the same value of the longitudinal steel bar spacing and the standard common wall length, so as to realize the standardization of the prefabricated shear wall. According to the invention, the longitudinal steel bar spacing of the shear wall is determined, so that the longitudinal steel bar output standardization of the prefabricated shear wall and the prefabricated shear wall standardization are realized, the opening spacing on the die can be unified, the die standardization is realized, the die utilization rate is improved, the problems of over-scattered size and various prefabricated types of the shear wall are solved, and the on-site construction is facilitated.
Description
Technical Field
The invention belongs to the technical field of shear wall design, and particularly relates to a wall length design method of a shear wall.
Background
In the design of a shear wall residential structure, a certain number of shear walls are required to be arranged in order to meet the requirements of use functions and structural stress. At present, because designers grasp different depths of structural design, the length of the arranged wall sections can meet the structural design requirements, classification and standardization of the types of the wall section lengths are not further considered, the relation between the lengths of the wall sections and the arrangement of longitudinal rib intervals is not considered, and the characteristics of wall section prefabrication are not combined, so that the length sizes of the arranged wall bodies are too various and scattered, for example, the wall lengths are 1400, 1450, 1500,1550, 1600, 1650, 1700,1750, 1800, 1850, 1900,1950, 2000, 2100, 2200, 2300 … and the like, and the size difference is small. Meanwhile, the longitudinal reinforcement arrangement intervals in the wall sections are disordered and difficult to be equidistant, for example, the intervals are 100, 105, 110 and 115, and even digits are non-0 or non-5.
Because the long kind of these walls of structural design is too numerous, be unfavorable for the high efficiency that the structural design drawing was drawn, and the inequality of indulge muscle interval or mixed and disorderly and the wall section of kind too much has also aggravated the complexity of site operation, and simultaneously, the length kind of these shear force walls is also numerous during prefabrication, indulge muscle in the wall and arrange inequality or interval mixed and disorderly, it is not unified to go out the muscle, the mould utilization ratio is low, the cost of single wall section is high, also can not high-efficient swiftly produce the installation of component and building site component, and then the standardization level that leads to the industrial production requirement is very low, structure and assembly design are complicated various, the component design task that deepens is heavy, the mould utilization ratio is low, component production and installation effectiveness are lower, cause the cost waste. Therefore, at present, the wall length of the shear wall needs to be standardized to reduce the variety of the wall length, and the longitudinal ribs are unified to form the standardization of the wall length of the shear wall and the rib-forming intervals of the longitudinal ribs.
Disclosure of Invention
The invention aims to provide a wall length design method of a shear wall, which can reduce the wall length types of the shear wall, realize uniform longitudinal rib outlet of the shear wall and further realize the standardization of the wall length and the longitudinal rib outlet spacing.
The technical scheme provided by the invention is as follows:
a wall length design method of a shear wall comprises the following steps:
constructing the relation between the net wall length and the longitudinal steel bar spacing of different types of shear walls containing edge members;
determining the clear wall length ranges of different types of shear walls;
determining the same value of the longitudinal steel bar spacing according to the relation between the clear wall length and the longitudinal steel bar spacing of different types of shear walls containing edge members and the clear wall length range;
and determining the standard common wall length of the shear walls of different types according to the same value of the longitudinal steel bar spacing.
Further, the relation between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing L-shaped and T-shaped cast-in-place shear walls0The distance relation between the longitudinal steel bars is L0＝L1+D+n*S+D+L2(1)；
Wherein L is1The length of the edge member at the intersection of the inner side walls of the L-shaped cast-in-place shear wall and the T-shaped cast-in-place shear wall is part of the length of the edge member;
L2the length of the edge member arranged at the end in the shape of a straight line outside the L-shaped cast-in-place shear wall and the T-shaped cast-in-place shear wall;
d is the length from the center of a first longitudinal steel bar in the L-shaped and T-shaped cast-in-situ shear walls to the edge of the wall;
n is the number of longitudinal steel bar intervals in the shear wall;
and S is the distance between the longitudinal steel bars in the shear wall.
Further, the determining the net wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of L-shaped and T-shaped cast-in-place shear walls0The range is 1500-3000 mm; (the value of the wall segment length does not affect the derivation result, the same applies below)
The determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining L according to design specification requirements1、L2And D is taken as the value;
according to the formula (1), L1、L2D and L0The same value of the longitudinal steel bar spacing S in the L-shaped shear wall and the T-shaped shear wall is obtained.
Further, the relationship between the net wall length and the longitudinal steel bar spacing for constructing the shear walls of different types specifically includes:
net wall length L for constructing L-shaped and T-shaped prefabricated shear walls without edge membersyzThe distance relation between the longitudinal steel bars is Lyz＝L0-L1-L2＝D+n*S+D(2)；
The determining of the clear wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of L-shaped and T-shaped prefabricated shear walls without edge membersyzThe range is 800-2300 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining the value of D according to the design specification requirement;
according to the formula (2), the value of D and LyzThe same value of the longitudinal steel bar spacing S in the L-shaped precast shear wall and the T-shaped precast shear wall without the edge members is obtained.
Further, the relationship between the net wall length and the longitudinal steel bar spacing for constructing the shear walls of different types specifically includes:
net wall length L for constructing L-shaped and T-shaped prefabricated shear walls with edge components at outer side I-shaped endsyzThe distance relation between the longitudinal steel bars is Lyz＝L0-L1＝D+n*S+D(3)；
The determining of the clear wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of L-shaped and T-shaped prefabricated shear walls with edge components at outer side I-shaped endsyzThe range is 1200-2700 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining the value of D according to the design specification requirement;
according to the formula (3), the value of D and LyzThe same value of the space S of the longitudinal steel bars in the L-shaped precast shear wall and the T-shaped precast shear wall containing the edge component with the outer side end is obtained.
Further, the relation between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing linear cast-in-place shear wall0The distance relation between the longitudinal steel bars is L0＝L3+D+n*S+D+L4(4)；
Wherein L is3The length of an edge member arranged on one side of the linear cast-in-place shear wall;
L4the length of an edge member arranged on the other side of the linear cast-in-place shear wall;
d is the length from the center of a first longitudinal steel bar in the in-line cast-in-place shear wall to the edge of the wall;
n is the number of longitudinal steel bar intervals in the shear wall;
and S is the distance between the longitudinal steel bars in the shear wall.
Further, the determining the net wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of linear cast-in-place shear wall0The range is 1700-3000 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining L according to design specification requirements3、L4And D is taken as the value;
according to the formula (4), L3、L4D and L0Obtaining the value range ofThe same value of the longitudinal steel bar spacing S in the I-shaped shear wall.
Further, the relation between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing linear prefabricated shear wall without edge membersyzThe distance relation between the longitudinal steel bars is Lyz＝L0-L3-L4＝D+n*S+D(5)；
The determining of the clear wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of prefabricated shear wall in straight line shape without edge componentsyzThe range is 900-2200 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining the value of D according to the design specification requirement;
according to the formula (5), the value of D and LyzThe same value of the longitudinal steel bar spacing S in the linear prefabricated shear wall without the edge component is obtained.
Further, the relation between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing linear prefabricated shear wall with side edge componentyzThe distance relation between the longitudinal steel bars is Lyz＝L0-L3＝L0-L4＝D+n*S+D(6)；
The determining of the clear wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of linear prefabricated shear wall with side edge componentyzThe range is 1300-2600 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining the value of D according to the design specification requirement;
according to the formula (6), the value of D and LyzThe same value of the longitudinal steel bar spacing S in the linear prefabricated shear wall with the side edge component is obtained.
The same value of the longitudinal steel bar spacing is 200 mm;
the standard common wall lengths of the L-shaped and T-shaped cast-in-place shear walls are 1600mm, 1800mm, 2000mm, 2200mm, 2400mm, 2600mm, 2800mm and 3000 mm;
the standard common wall length of the L-shaped prefabricated shear wall and the T-shaped prefabricated shear wall without the edge members is 900mm, 1100mm, 1300mm, 1500mm, 1700mm, 1900mm, 2100mm and 2300 mm;
the standard common wall length of the prefabricated shear wall with the L-shaped and T-shaped outer edge components is 1300mm, 1500mm, 1700mm, 1900mm, 2100mm, 2300mm, 2500mm and 2700 mm;
the standard common wall length of the straight cast-in-place shear wall is 1700mm, 1900mm, 2100mm, 2300mm, 2500mm, 2700mm and 2900 mm;
the standard common wall length of the I-shaped prefabricated shear wall without the edge members is 900mm, 1100mm, 1300mm, 1500mm, 1700mm, 1900mm and 2100 mm;
standard common wall lengths of the I-shaped prefabricated shear wall with the outer edge members are 1300mm, 1500mm, 1700mm, 1900mm, 2100mm, 2300mm and 2500 mm.
The wall length design method of the shear wall provided by the invention can bring the following beneficial effects:
the common wall length of the cast-in-place shear wall is determined, so that the types of wall sections are reduced, the design of the wall sections is simplified and standardized, the design efficiency is improved, the standardization of the cast-in-place template (steel and wood) engineering is improved, and conditions are created for the cyclic adoption of the formed aluminum mold; the same value of the space between the longitudinal steel bars in the cast-in-place common wall section (including the edge member) simplifies the placement and operation of the steel bars on site, ensures the space accuracy more easily, reduces the labor intensity of operators on site and improves the construction efficiency; meanwhile, a formed reinforcing mesh can be adopted, the field reinforcing bar engineering operation is reduced, and the construction efficiency is further improved. The common wall length of the prefabricated shear wall derived from the length of the cast-in-place common wall section reduces the types of the prefabricated wall sections, so that a large amount of repeated similar work is omitted in the wall section component design, the design drawing efficiency is improved, and the manufacturing and installation efficiency of the components is improved; the same value of the space between the longitudinal steel bars in the prefabricated part can ensure that the on-site longitudinal steel bars are aligned more accurately and are easy to operate, and the quality of the up-and-down connection of the construction wall body is ensured more; the same value of the longitudinal steel bar spacing can also lead the spacing of the holes on the die to be uniform, the die can be repeated for multiple times, the utilization rate of the die is improved, the die opening times of factories are reduced, the die cost is reduced, the die and the engineering cost are saved, and the time cost is saved; above, through the multiple common standard wall length (cast-in-place and prefabricated) of shear force wall and the identity value of longitudinal reinforcement interval, realize the standardization of shear force wall, solved the shear force wall size too scattered, the problem of a great variety not only provides standardized basis for the assembled design, is favorable to the site operation moreover.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic flow chart illustrating a first embodiment of a method for designing a wall length of a shear wall according to the present invention;
FIG. 2 is a schematic structural diagram of an L-shaped cast-in-place shear wall;
FIG. 3 is a schematic structural view of a T-shaped cast-in-place shear wall;
FIG. 4 is a schematic structural view of an L-shaped prefabricated shear wall without edge members;
FIG. 5 is a schematic structural view of a T-shaped prefabricated shear wall without edge members;
FIG. 6 is a schematic structural view of an L-shaped prefabricated shear wall with an outer-side-end edge member;
FIG. 7 is a schematic structural view of a T-shaped prefabricated shear wall with an outer-side-end edge member;
FIG. 8 is a schematic structural view of a cast-in-place shear wall in a straight shape;
FIG. 9 is a schematic structural view of a inline-type prefabricated shear wall without edge members;
FIG. 10 is a schematic structural view of a inline prefabricated shear wall having a side edge member.
Description of the reference numerals
10. Longitudinal reinforcing steel bars; 20. a first edge member; 30. a second edge member.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
For the purpose of understanding the present invention, some parameters involved in the present invention are described below:
(1) shear wall structure
The shear wall structure is a structure which is composed of shear walls and bears vertical and horizontal actions, at present, the most widely used method for building high-rise residences is a reinforced concrete shear wall structure form, and a main lateral force resisting component of the structure is composed of a plurality of reinforced concrete shear wall sections which are distributed uniformly and have different lengths.
The invention relates to a design method and a standardization method for the arrangement of wall section length and longitudinal steel bars of a shear wall, which can be applied to two types of cast-in-place and prefabrication.
(2) Wall length and wall thickness of shear wall section
Generally, a wall section of a shear wall has three dimensions, the floor height of a house is the wall height H, the horizontal length of the wall section is the wall length L, and the horizontal width of the wall section is the wall thickness b. Shear wall sections are generally in three planar forms, the most common being straight, L-shaped and T-shaped.
The wall thickness b of a common wall segment is 200-300 mm, which can meet the design requirements of a shear wall structure, so the wall thickness application range of the following design method and method of the shear wall is 200-300 mm. Other wall thickness methods can also be used for deducing similar methods by applying the design method of the shear wall.
As can be seen from FIGS. 2 and 3, the length of the I section of the L-shaped and T-shaped shear wall sections is L-b, which defines the clear wall length L of the L-shaped and T-shaped shear walls (including the edge members)0L-b. Obviously, the clear wall length L in a I-shaped shear wall (including edge members)0＝L。
Generally, for a high-rise shear wall structure, design specifications stipulate: when L is less than or equal to 4b, the column is designed according to the specification and is not discussed here.
When b is less than or equal to 300mm and L is more than 4b and less than or equal to 8b, the wall is a short wall, and is called a short-limb shear wall. Because of its relatively low lateral stiffness, it is less preferred.
For example, a wall length L > 8 b-8 x 200-1600 mm, typically providing relatively large lateral stiffness, in terms of basic building modulus (M), is 200mm0100mm), the wall length L is 1700mm, and the following derivation and conclusion are made, when the net wall length L of the in-line wall is low0Length of I-shaped wall segment in L-shaped and T-shaped wall is lower than L1700 mm0＝L-b＝1700-200＝1500mm。
When the length of the wall section is long, the reinforcing bars of the wall body are easy to break, and the length L of the general wall section is not more than 8m according to the standard. Meanwhile, in the shear wall residence, the width (bay) of each room is generally not more than 4.2 meters, the length (depth) of each room is generally not more than 5.4 meters, and the rooms are generally provided with doors, windows and the like, so when the plane length of each wall of each room is generally not more than 3 meters, the net wall length L is taken0The high value is deduced to be less than or equal to 3000 mm. (high values may take other values less than 8 meters, but the length of the wall segment does not affect the following derivation)
Therefore, the method comprises the following steps: the length of the clear wall adopted for the straight-line-shaped wall section is 1700 mm-L0Less than or equal to 3000mm (formula a);
for the L-shaped wall section, the net wall length is more than or equal to 1500mm0Less than or equal to 3000mm (formula b);
the net wall length of the T-shaped wall section is more than or equal to 1500mm and less than or equal to L0Less than or equal to 3000mm (formula c).
(3) Edge member of shear wall
In the shear wall structure, design specifications stipulate that a region (with a large value) of 1/10, which is the height or the total height within a range of a certain number of floors in the lower part of a house, is a bottom reinforcing part and the rest are other parts according to the height and the number of floors of the house, and the design specifications stipulate that wall sections of other parts should be provided with structural edge members, hereinafter referred to as edge members, in both side regions along the length direction of a plane. The constructional edge members of a wall section with a seismic rating of three to four with a b-200 mm are arranged as shown in figures 2, 3 and 8.
On both sides of the horizontal direction of the straight-line-shaped wall section, the areas of the edge members are the wall thickness b x 400(400 is the length of the edge member); the first edge member 20 is on the left and the second edge member 30 is on the right.
An L-shaped first edge component 20 is arranged on the corner position side (the intersection of the inner side wall bodies) of the L-shaped wall section, and the area of the L-shaped first edge component in the length direction is [ (the wall thickness in the other direction +300) × b ], wherein 300 is the length of the first edge component, the area of the second edge component on the other side (the character end at the outer side) in the length direction is the wall thickness b × 400, and 400 is the length of the second edge component;
the region of the first edge member 20 disposed along the length direction on the side of the intersection of the T-shaped wall segments (the intersection of the inner walls) is [ (wall thickness in the other direction +300) × b ], where 300 is the length of the first edge member, the region of the second edge member 30 along the other side (the outer side word) along the length direction is wall thickness b 400, and 400 is the length of the second edge member 30;
namely, the wall section is a complete shear wall long wall from the left first edge member 20+ the wall body except the edge member + the right second edge member 30.
(4) Vertical reinforcing bars (also called longitudinal reinforcing bars, hereinafter called longitudinal reinforcing bars) of shear wall are arranged at intervals S, D and D1，D2。
It is known that the longitudinal reinforcements 10 of the shear wall body are arranged at a certain spacing distance, which is the longitudinal reinforcement spacing S, and the specification specifies that S is less than or equal to 300mm (in some cases, the spacing of the vertically distributed reinforcements of the top shear wall of a high-rise building, the shear wall of a staircase and an elevator room of a long rectangular plane building, the longitudinal shear wall of an end bay and the end gable wall should not be more than 200 mm); meanwhile, the dense arrangement of the vertical steel bars in the wall section does not accord with the stress principle of the shear wall, and the construction is not facilitated, and S is generally more than 100mm, namely S is more than 100 and less than or equal to 300 mm.
The distance from the center of the first longitudinal steel bar 10 to the wall side of the wall section in the length direction is D.
Generally, the specification stipulates that D is more than or equal to 15+ D/2 and less than or equal to 50+ D/2 for the wall section of the shear wall, and D is the diameter of the steel bar.
For cast-in-place members, D is usually 12 to 25mm, D is 12 to 56mm when D is 12mm, and D is 31 to 68mm when D is 25mm, obviously, there are 31 to 56mm (formula D), and reinforcing steel bars with D being 12 to 25mm can be covered.
For a prefabricated part which adopts a grouting sleeve process to connect an upper reinforcing steel bar and a lower reinforcing steel bar, the outer diameter of the sleeve is 44-58 mm relative to the reinforcing steel bar with D being 12-25 mm, D is 37-72 mm, D is 44-79 mm, and D can be 44-72 mm (formula e).
And comparing the formula D with the formula e to obtain the D which is 44-56 mm.
For identification, simply take D to 50mm, which is the most common value practice at present.
Correspondingly, the distance from the first row of longitudinal steel bars on the left side of the wall body except the edge member to the right side of the first edge member 20 is D1(ii) a The distance from the first row of longitudinal steel bars on the right side of the wall body to the right side of the second edge member 30 except the edge member is D2(ii) a In the prefabricated shear wall, wall bodies except edge components are often prefabricated, and D is taken for convenience and uniformity2＝D1＝D＝50mm。
From the above description, it can be seen that the shear wall segment length L or the wall segment clear wall length L0The value of (A) has positive correlation with the longitudinal steel bar spacing S and the uniqueness of the spacing.
The invention provides a specific embodiment of a wall length design method of a prefabricated shear wall, which is suitable for a shear wall structure residential system and comprises the following steps of:
s100, establishing a relation between the net wall length and the longitudinal steel bar spacing of different types of shear walls containing edge members; purpose is wall section L0The longitudinal bar spacings (including the edge members) are all unique and the same.
Specifically, in a shear wall structure housing system, the shear walls are of various types, such as L-shaped, T-shaped, straight-line-shaped and the like, the relationship between the net wall length and the steel bar pitch of the shear walls of different types differs, and the value of the net wall length of the shear wall has positive correlation and uniqueness with the pitch of the longitudinal steel bars 10, so that the relationship between the net wall length and the steel bar pitch of the shear walls of different types including the edge member can be constructed.
S200, determining the clear wall length ranges of different types of shear walls;
specifically, in a shear wall structure system, in order to prevent the shear wall from being excessively stressed, the shear walls are uniformly distributed, so that the length of the shear wall cannot be too long, and the wall length of the shear wall cannot be too short. The net wall length ranges for the different types of shear walls can be seen in equations a through c above.
S300, determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range;
specifically, after the relation between the net wall length of the shear wall and the steel bar spacing and the net wall length range of the shear wall are obtained, the same value of the steel bar spacing can be determined according to the net wall length range. Because of the long shear force wall of different walls all carries out the reinforcing bar according to this same value and arranges, can realize indulging the muscle and go out the standardization of muscle interval, and then realize indulging the muscle and unify out the muscle.
S400, determining the standard common wall length of the shear walls of different types according to the same value of the longitudinal steel bar spacing.
Specifically, after the same value of the steel bar spacing is determined, the standard common wall lengths of the shear walls of different types can be determined according to the same value, the obtained standard common wall lengths of the shear walls all meet the use function and calculation requirements, the standard common wall lengths of the shear walls are an arithmetic progression taking the same value of the steel bar spacing as a tolerance, various types such as 1500,1550,1700,1750,1900,1950 … are avoided, the wall length types are simplified, the standardization of the shear walls is realized, the steel bar spacing of all the shear walls with standardized sizes is the same, and the steel bar connection of the shear walls with different layers is facilitated.
In one embodiment, the present embodiment is described by taking an L-shaped cast-in-place shear wall and a T-shaped cast-in-place shear wall (including two side edge members) as an example, wherein a structural diagram of the L-shaped cast-in-place shear wall is shown in fig. 2, and a structural diagram of the T-shaped cast-in-place shear wall is shown in fig. 3;
s100, specifically, the relation between the net wall length and the longitudinal steel bar spacing for constructing the shear walls with the edge members in different types comprises the following steps:
net wall length L for constructing L-shaped and T-shaped cast-in-place shear walls0The distance relation between the longitudinal steel bars is L0＝L1+D+n*S+D+L2(1)；
Wherein L is1The length of the edge member at the intersection of the inner walls of the L-shaped cast-in-place shear wall and the T-shaped cast-in-place shear wall is described, wherein the total length of the edge member at the intersection is the wall thickness b + L1，L1Is the remaining length of the wall thickness subtracted from the total length of the edge member; l is2The length of the edge member arranged at the end in the shape of a straight line outside the L-shaped cast-in-place shear wall and the T-shaped cast-in-place shear wall; d is the length from the center of a first longitudinal steel bar in the L-shaped and T-shaped cast-in-situ shear walls to the edge of the wall; n is the number of longitudinal steel bar intervals in the shear wall; and S is the distance between the longitudinal steel bars in the shear wall.
S200, the step of determining the net wall length ranges of the shear walls of different types specifically comprises the following steps:
determining net wall length L of L-shaped and T-shaped cast-in-place shear walls0The range is 1500-3000 mm;
s300, according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the range of the net wall length, determining the same value of the longitudinal steel bar spacing specifically comprises the following steps:
determining L according to design specification requirements1、L2And D is taken as the value;
according to the formula (1), L1、L2D and L0The same value of the longitudinal steel bar spacing S in the L-shaped shear wall and the T-shaped shear wall is obtained.
Specifically, as can be seen from the above description of parameters and fig. 2 and 3, when edge members are disposed on two sides of a cast-in-place shear wall, L is0＝L1+D+n*S+D+L2In the above description, it can be seen from the above description of the parameter (3) that an edge member with a wall thickness of +300mm in the other direction is required to be disposed at the intersection side of the L-shaped and T-shaped walls, and an edge member with a length of 400mm, i.e., an L-shaped member, is required to be disposed at the end of the concrete reinforcing bar in the line of the L-shaped and T-shaped shear walls1＝300mm，L2＝400mm。
Therefore, the method comprises the following steps: l is0＝300+D+n*S+D+400mm＝700+2*D+n*S；
According to the formula b and the formula c, the net wall length of the L-shaped shear wall and the T-shaped shear wall is generally between 1500mm and 3000 mm.
Therefore, the method comprises the following steps: the net wall length of the L-shaped shear wall and the T-shaped shear wall is more than or equal to 1500 +2 + D + n + S and less than or equal to 3000;
the distance between the first steel bar in the shear wall and the end (edge) of the shear wall is D, and is limited by various factors, and the formula D and the formula e show that the value range of D is generally 44-56 mm, and when the value of D is too small, the distance between the first steel bar and the end can influence the durability of the building. In the fabricated building, for simple identification, D is generally 50 mm.
The above formula (1) is simplified to obtain: the net length L of the net wall of the L-shaped and T-shaped cast-in-place shear wall is more than or equal to 700 and less than or equal to 2200, and the net length L of the net wall section of the L-shaped and T-shaped cast-in-place shear wall is calculated according to the net length L of the net wall of the L-shaped and T-shaped shear wall which is more than or equal to 700 and less than or equal to 2200 and the net length of the net wall section of the L-shaped and T-shaped shear wall which is more than or equal to 700 and less than or equal to n and less than or equal to 22000The relationship with the reinforcement spacing S is shown in table 1 below.
TABLE 1
| n＝ | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 3000 | 314 | 275 | 244 | 220 | 200 | 183 | 169 | 157 | 147 | 138 | 129 | 122 | 116 | 110 | 105 | 100 | ||||
| 2900 | 300 | 263 | 233 | 210 | 191 | 175 | 162 | 150 | 140 | 131 | 124 | 117 | 111 | 105 | 100 | |||||
| 2800 | 286 | 250 | 222 | 200 | 182 | 167 | 154 | 143 | 133 | 125 | 118 | 111 | 105 | 100 | ||||||
| 2700 | 271 | 238 | 211 | 190 | 173 | 158 | 146 | 136 | 127 | 119 | 112 | 106 | 100 | |||||||
| 2600 | 300 | 257 | 225 | 200 | 180 | 164 | 150 | 138 | 129 | 120 | 113 | 106 | 100 | |||||||
| 2500 | 283 | 243 | 213 | 189 | 170 | 155 | 142 | 131 | 121 | 113 | 106 | 100 | ||||||||
| 2400 | 267 | 229 | 200 | 178 | 160 | 145 | 133 | 123 | 114 | 107 | 100 | |||||||||
| 2300 | 300 | 250 | 214 | 188 | 167 | 150 | 136 | 125 | 115 | 107 | 100 | |||||||||
| 2200 | 280 | 233 | 200 | 175 | 156 | 140 | 127 | 117 | 108 | 100 | ||||||||||
| 2100 | 260 | 217 | 186 | 163 | 144 | 130 | 118 | 108 | 100 | |||||||||||
| 2000 | 300 | 240 | 200 | 171 | 150 | 133 | 120 | 109 | 100 | |||||||||||
| 1900 | 275 | 220 | 183 | 157 | 138 | 122 | 110 | 100 | ||||||||||||
| 1800 | 250 | 200 | 167 | 143 | 125 | 111 | 100 | |||||||||||||
| 1700 | 300 | 225 | 180 | 150 | 129 | 113 | 100 | |||||||||||||
| 1600 | 267 | 200 | 160 | 133 | 114 | 100 | ||||||||||||||
| 1500 | 233 | 175 | 140 | 117 | 100 |
As can be seen from table 1, only S-200 mm repeats in an L-shaped shear wall with an even net length of wall segments. So that the building modulus (M) is met0100mm), and the uniform spacing of the reinforcing steel bars which are simple and easy to identify and meet the specification requirement is 200 mm.
Therefore, the corresponding wall segment clear wall lengths of the commonly used L-shaped and T-shaped cast-in-place shear walls are 3000mm, 2800mm, 2600mm, 2400mm, 2200mm, 2000mm, 1800mm and 1600mm, and are even clear wall lengths. The length and longitudinal steel bar arrangement of the common cast-in-place L-shaped and T-shaped shear walls are shown in fig. 2 and 3. The wall length is designed to meet the use function and calculation requirements, and meanwhile, the wall length is selected from the length numbers, so that the various types such as 1500,1550,1700,1750,1900 and 1950 … are avoided, and the wall length type is simplified.
When the cast-in-place structure is designed, the L-shaped shear wall and the T-shaped shear wall can be long due to the wall limbs, and the longitudinal ribs are distributed with the reinforcing steel bars according to the rule that S is 200mm, so that the design is simplified, the types of net lengths of wall sections are reduced, the field construction is convenient, the standardization is formed, conditions are created for the adoption of the formed reinforcing steel bar net, and the quality of the connecting nodes is easily guaranteed.
In another embodiment, the present embodiment is described by taking a wall length design method when prefabricating an L-shaped shear wall without edge members and a T-shaped shear wall without edge members as an example, wherein the L-shaped shear wall without edge members is shown in fig. 4, and the T-shaped shear wall without edge members is shown in fig. 5.
Similarly, the length L of the wall section of the prefabricated shear wall is firstly establishedyzThe relation with the longitudinal steel bar spacing S;
wall segment length L of prefabricated shear wallyz＝L0-L1-L2As can be seen from the above description of parameters D + n + S + D50 + n + S +50 100+ n + S (2), L is 1500mm ≦ L0Less than or equal to 3000mm, and L1＝300mm，L2400mm, so (1500-300-yzLess than or equal to (3000-: the length L of the wall body prefabricated wall without the edge member of the L-shaped and T-shaped shear walls is calculated according to the length L of the wall body prefabricated wall without the edge member of the L-shaped and T-shaped shear walls, wherein the length L is not less than 100+ nS not more than 2300mm, and n is the number of longitudinal steel bar intervals in the shear wallyzThe relationship with the longitudinal bar spacing S is shown in table 2 below.
TABLE 2
As can be seen from table 2 above: only S-200 mm repeats in prefabricated (no edge members) wall segments of odd length L-shaped and T-shaped wall segments. So that the building modulus (M) is met0100mm), and the same spacing of the reinforcing steel bars which are simple and easy to identify and meet the specification requirement is 200 mm.
Correspondingly, the lengths of the common prefabricated wall sections of the wall body without the edge members in the common L-shaped wall section and the common T-shaped wall section are 2300mm, 2100mm, 1900mm, 1700mm, 1500mm, 1300mm, 1100mm and 900mm, and are all odd net wall lengths.
When the prefabricated wall section is designed, the length of the prefabricated wall body without the edge component can be the length of the prefabricated wall sections, and the same interval of the longitudinal ribs is 200 mm. Therefore, the processing design of the components is simplified, the types of the lengths of the prefabricated wall sections are reduced, rib holes of upper and lower molds of the prefabricated wall sections are unified, the standardization of the upper and lower molds is formed, part of the molds can be recycled to the maximum extent, the construction cost of the components is reduced, the construction is convenient, the building industrialization and the automation are further promoted, and a certain effect on promoting emission reduction is achieved. The above results are consistent with the longitudinal rib spacing of the cast-in-place L-shaped and T-shaped shear walls and are mutually verified.
In fact, we can also subtract the length of the edge members at two sides from the length of the common wall sections of cast-in-place L-shaped and T-shaped walls at 3000mm, 2800mm, 2600mm, 2400mm, 2200mm, 2000mm, 1800mm and 1600mm, and obtain the same result, wherein the length of the common prefabricated wall sections is 2300mm, 2100mm, 1900mm, 1700mm, 1500mm, 1300mm, 1100mm and 900 mm.
In another embodiment, the wall length design method when the L-shaped prefabricated shear wall and the T-shaped prefabricated shear wall include the second edge member 30 is described as an example, the structure of the L-shaped prefabricated shear wall including the second edge member is shown in fig. 6, and the structure of the T-shaped prefabricated shear wall including the second edge member is shown in fig. 7.
Firstly, the length L of the wall section of the prefabricated shear wall is establishedyzThe relation with the longitudinal steel bar spacing S;
the prefabricated wall segment length L is obtained from FIGS. 6 and 7yz＝L0-L1(ii) 100+ n S (3) and 1500mm ≦ L0Less than or equal to 3000mm, and L1300mm, so (1500-yzLess than or equal to (3000 +300) mm, namely: 1200mm is less than or equal to 100+ n S is less than or equal to 2700 mm.
Calculating the length L of the prefabricated wall body containing the second edge member of the L-shaped and T-shaped shear walls according to the length L of the prefabricated wall body containing the second edge member and prefabricated by the shear walls with the thickness of 1200mm or more and the thickness of n S or more and the thickness of 2700mmyzThe relationship with the reinforcement spacing S is shown in table 3 below.
TABLE 3
| n＝ | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 2700 | 289 | 260 | 236 | 217 | 200 | 186 | 173 | 163 | 153 | 144 | 137 | 130 | 124 | 118 | 113 | 108 | |||||
| 2600 | 278 | 250 | 227 | 208 | 192 | 179 | 167 | 156 | 147 | 139 | 132 | 125 | 119 | 114 | 109 | 104 | |||||
| 2500 | 300 | 267 | 240 | 218 | 200 | 185 | 171 | 160 | 150 | 141 | 133 | 126 | 120 | 114 | 109 | 104 | 100 | ||||
| 2400 | 288 | 256 | 230 | 209 | 192 | 177 | 164 | 153 | 144 | 135 | 128 | 121 | 115 | 110 | 105 | 100 | |||||
| 2300 | 275 | 244 | 220 | 200 | 183 | 169 | 157 | 147 | 138 | 129 | 122 | 116 | 110 | 105 | 100 | ||||||
| 2200 | 300 | 263 | 233 | 210 | 191 | 175 | 162 | 150 | 140 | 131 | 124 | 117 | 111 | 105 | 100 | ||||||
| 2100 | 286 | 250 | 222 | 200 | 182 | 167 | 154 | 143 | 133 | 125 | 118 | 111 | 105 | 100 | |||||||
| 2000 | 271 | 238 | 211 | 190 | 173 | 158 | 146 | 136 | 127 | 119 | 112 | 106 | 100 | ||||||||
| 1900 | 300 | 257 | 225 | 200 | 180 | 164 | 150 | 138 | 129 | 120 | 113 | 106 | 100 | ||||||||
| 1800 | 283 | 243 | 213 | 189 | 170 | 155 | 142 | 131 | 121 | 113 | 106 | 100 | |||||||||
| 1700 | 267 | 229 | 200 | 178 | 160 | 145 | 133 | 123 | 114 | 107 | 100 | ||||||||||
| 1600 | 300 | 250 | 214 | 188 | 167 | 150 | 136 | 125 | 115 | 107 | 100 | ||||||||||
| 1500 | 280 | 233 | 200 | 175 | 156 | 140 | 127 | 117 | 108 | 100 | |||||||||||
| 1400 | 260 | 217 | 186 | 163 | 144 | 130 | 118 | 108 | 100 | ||||||||||||
| 1300 | 300 | 240 | 200 | 171 | 150 | 133 | 120 | 109 | 100 | ||||||||||||
| 1200 | 275 | 220 | 183 | 157 | 138 | 122 | 110 | 100 |
As can be seen from table 3 above: only S-200 mm repeats in L-shaped and T-shaped shear wall segments with odd lengths of wall segments containing the second edge member. So that the building modulus (M) is met0100mm), and the same spacing of the longitudinal steel bars which are simple and easy to identify and meet the specification requirement is 200 mm.
Correspondingly, the lengths of the common prefabricated wall sections of the wall body prefabricated with the second edge members in the common L-shaped and T-shaped wall sections are 2700mm, 2500mm, 2300mm, 2100mm, 1900mm, 1700mm, 1500mm and 1300mm, which are all odd clear wall lengths.
When the prefabricated wall section is designed, the length of the prefabricated wall body containing the second edge component at the outer side I-shaped end can be the length of the wall sections, and the same interval of the longitudinal ribs is 200 mm. Therefore, the processing design of the components is simplified, the types of the lengths of the prefabricated wall sections are reduced, rib holes of upper and lower molds of the prefabricated wall sections are unified, the standardization of the upper and lower molds is formed, part of the molds can be recycled to the maximum extent, the construction cost of the components is reduced, the construction is convenient, the building industrialization and the automation are further promoted, and a certain effect on promoting emission reduction is achieved. The above results are consistent with the results of cast-in-place L-shaped and T-shaped shear walls and are mutually verified.
In fact, we can also subtract 300mm from the length of the edge member on one side of the commonly used wall segment of the cast-in-place L-shaped and T-shaped shear walls of 3000mm, 2800mm, 2600mm, 2400mm, 2200mm, 2000mm, 1800mm, 1600mm, and obtain the same result, and the commonly used prefabricated wall segment of the wall body prefabricated with the second edge member in the L-shaped and T-shaped shear wall segments of 2700mm, 2500mm, 2300mm, 2100mm, 1900mm, 1700mm, 1500mm, 1300 mm.
In another embodiment, the in-situ cast-in-place shear wall is illustrated as an example, and the structure of the in-situ cast-in-place shear wall is shown in fig. 8.
S100, specifically, the relation between the net wall length and the longitudinal steel bar spacing for constructing the shear walls with the edge members in different types comprises the following steps:
net wall length L for constructing linear cast-in-place shear wall0The distance relation between the longitudinal steel bars is L0＝L3+D+n*S+D+L4(4)；
Wherein L is3The length of an edge member arranged on one side of the linear cast-in-place shear wall; l is4The length of an edge member arranged on the other side of the linear cast-in-place shear wall; d is the length from the center of a first longitudinal steel bar in the in-line cast-in-place shear wall to the edge of the wall; n is the number of longitudinal steel bar intervals in the shear wall; and S is the distance between the longitudinal steel bars in the shear wall.
S200, the step of determining the net wall length ranges of the shear walls of different types specifically comprises the following steps:
determining net wall length L of linear cast-in-place shear wall0Range1700 to 3000 mm;
s300, according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the range of the net wall length, determining the same value of the longitudinal steel bar spacing specifically comprises the following steps:
determining L according to design specification requirements3、L4And D is taken as the value;
according to the formula (4), L3、L4D and L0The same value of the longitudinal steel bar spacing S in the straight shear wall is obtained.
Specifically, according to the parameter description (3), two ends of the I-shaped shear wall need to be provided with edge members with the length of 400mm, namely L3＝L4＝400mm；
Therefore, the method comprises the following steps: clear wall length L of I-shaped shear wall0＝400+D+n*S+D+400mm＝800+2*D+n*S；
According to the formula a, the wall length of the straight shear wall is generally 1700-3000 mm, so that the wall length is 1700 + 800+2 + n + S is 3000 or less; as can be seen from the point (4) of the parameter description, D is 50mm, and the simplified formula includes: n is more than or equal to 800 and S is less than or equal to 2100.
The relationship between the net wall length and the longitudinal steel bar spacing of the cast-in-place I-shaped shear wall calculated according to the equation of n × S is more than or equal to 800 and less than or equal to 2100 is shown in the following table 4.
TABLE 4
As can be seen from table 4 above: only S-200 mm appears repeatedly in a straight shear wall with odd net wall segment lengths. So that the building modulus (M) is met0100mm), and the same spacing of the reinforcing steel bars which are simple and easy to identify and meet the specification requirement is 200 mm.
The corresponding net lengths of the common in-situ cast-in-place shear wall in the shape of a straight line are 2900mm, 2700mm, 2500mm, 2300mm, 2100mm, 1900mm and 1700mm, and are all odd net wall lengths.
When the cast-in-place structure is designed, the straight shear wall section can adopt the net lengths, and the standard spacing of the longitudinal ribs is 200 mm. Thus, the design is simplified, the types of net lengths of wall sections are reduced, the construction is convenient, and the standardization is formed. It also allows for the use of formed mesh reinforcements (a product: factory production, not on-site lashing).
In another embodiment, the wall length design method in the case of prefabricating a straight shear wall without edge members is taken as an example in the present embodiment, and the structure of the prefabricated shear wall in the case of prefabricating a straight shear wall without edge members is shown in fig. 9.
As shown in FIG. 9, the length L of the wall segment of the prefabricated I-shaped shear wallyz＝L0-L3-L4(ii) 50+ n S + 50-100 + n S (5), and 1700mm ≦ L0≤3000mm，L3＝L4400mm, so (1700-400-) -400 mm ≦ LyzLess than or equal to (3000-: the length L of the prefabricated wall body without the edge member of the wall body of the straight shear wall is calculated according to the length L of the prefabricated wall body without the edge member of the straight shear wall, which is not less than 900mm and not more than 100+ nS and not more than 2200mm, wherein n is the number of longitudinal steel bar intervals in the shear wallyzThe relationship with the longitudinal bar spacing S is shown in table 5 below.
TABLE 5
| n＝ | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 2200 | 300 | 263 | 233 | 210 | 191 | 175 | 162 | 150 | 140 | 131 | 124 | 117 | 111 | 105 | 100 | ||||
| 2100 | 286 | 250 | 222 | 200 | 182 | 167 | 154 | 143 | 133 | 125 | 118 | 111 | 105 | 100 | |||||
| 2000 | 271 | 238 | 211 | 190 | 173 | 158 | 146 | 136 | 127 | 119 | 112 | 106 | 100 | ||||||
| 1900 | 300 | 257 | 225 | 200 | 180 | 164 | 150 | 138 | 129 | 120 | 113 | 106 | 100 | ||||||
| 1800 | 283 | 243 | 213 | 189 | 170 | 155 | 142 | 131 | 121 | 113 | 106 | 100 | |||||||
| 1700 | 267 | 229 | 200 | 178 | 160 | 145 | 133 | 123 | 114 | 107 | 100 | ||||||||
| 1600 | 300 | 250 | 214 | 188 | 167 | 150 | 136 | 125 | 115 | 107 | 100 | ||||||||
| 1500 | 280 | 233 | 200 | 175 | 156 | 140 | 127 | 117 | 108 | 100 | |||||||||
| 1400 | 260 | 217 | 186 | 163 | 144 | 130 | 118 | 108 | 100 | ||||||||||
| 1300 | 300 | 240 | 200 | 171 | 150 | 133 | 120 | 109 | 100 | ||||||||||
| 1200 | 275 | 220 | 183 | 157 | 138 | 122 | 110 | 100 | |||||||||||
| 1100 | 250 | 200 | 167 | 143 | 125 | 111 | 100 | ||||||||||||
| 1000 | 300 | 225 | 180 | 150 | 129 | 113 | 100 | ||||||||||||
| 900 | 267 | 200 | 160 | 133 | 114 | 100 |
As can be seen from table 5 above: only S-200 mm repeats in a prefabricated (without edge members) wall segment of odd length. Therefore, the same spacing of the reinforcing steel bars which meet the requirement of building modulus (M0-100 mm), are simple and easy to identify and meet the requirement of the specification is taken as S-200 mm.
Accordingly, the lengths of the common prefabricated wall sections of the prefabricated wall body without edge members in the common in-line wall section are 2100mm, 1900mm, 1700mm, 1500mm, 1300mm, 1100mm and 900mm, which are all odd clear wall lengths.
When the prefabricated wall section is designed, the length of the prefabricated wall section of the prefabricated wall body without the edge component can be the length of the prefabricated wall sections, and the same interval of the longitudinal ribs is 200 mm. Therefore, the processing design of the components is simplified, the types of the lengths of the prefabricated wall sections are reduced, rib holes of upper and lower molds of the prefabricated wall are unified, the standardization of the upper and lower molds is formed, part of the molds can be recycled to the maximum extent, the construction cost of the components is reduced, the construction is convenient, the building industrialization and the automation are further promoted, and a certain effect on promoting the emission reduction is achieved.
In fact, we can also subtract the 2-sided edge member length of 800mm from the in-situ in-line wall segment length of 2900mm, 2700mm, 2500mm, 2300mm, 2100mm, 1900mm, 1700mm, the same result is obtained, with the common prefabricated wall segment (without prefabricated members) still having a length of 2100mm, 1900mm, 1700mm, 1500mm, 1300mm, 1100mm, 900 mm.
In another embodiment, the wall length design method when the second edge member 30 is included in the I-shaped prefabricated shear wall will be described as an example, and the structure of the I-shaped prefabricated shear wall including the second edge member is shown in FIG. 10.
Firstly, the length L of the wall section of the prefabricated shear wall is establishedyzThe relation with the longitudinal steel bar spacing S;
from FIG. 10, the prefabricated wall segment length Lyz＝L0-L1＝L0-L2(ii) 100+ n S (6) and 1700mm ≦ L0Less than or equal to 3000mm, and L3＝L4400mm, so (1700) -400 mm ≦ LyzLess than or equal to (3000 + 400) mm, namely: 1300mm is less than or equal to 100+ n S is less than or equal to 2600 mm.
Calculating the length L of the prefabricated wall body containing the second edge member prefabricated by the I-shaped shear wall according to the condition that 1300mm is not more than 100+ n S is not more than 2600mmyzThe relationship with the reinforcement spacing S is shown in table 6 below.
TABLE 6
| n＝ | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 2600 | 278 | 250 | 227 | 208 | 192 | 179 | 167 | 156 | 147 | 139 | 132 | 125 | 119 | 114 | 109 | |||||
| 2500 | 300 | 267 | 240 | 218 | 200 | 185 | 171 | 160 | 150 | 141 | 133 | 126 | 120 | 114 | 109 | 104 | ||||
| 2400 | 288 | 256 | 230 | 209 | 192 | 177 | 164 | 153 | 144 | 135 | 128 | 121 | 115 | 110 | 105 | 100 | ||||
| 2300 | 275 | 244 | 220 | 200 | 183 | 169 | 157 | 147 | 138 | 129 | 122 | 116 | 110 | 105 | 100 | |||||
| 2200 | 300 | 263 | 233 | 210 | 191 | 175 | 162 | 150 | 140 | 131 | 124 | 117 | 111 | 105 | 100 | |||||
| 2100 | 286 | 250 | 222 | 200 | 182 | 167 | 154 | 143 | 133 | 125 | 118 | 111 | 105 | 100 | ||||||
| 2000 | 271 | 238 | 211 | 190 | 173 | 158 | 146 | 136 | 127 | 119 | 112 | 106 | 100 | |||||||
| 1900 | 300 | 257 | 225 | 200 | 180 | 164 | 150 | 138 | 129 | 120 | 113 | 106 | 100 | |||||||
| 1800 | 283 | 243 | 213 | 189 | 170 | 155 | 142 | 131 | 121 | 113 | 106 | 100 | ||||||||
| 1700 | 267 | 229 | 200 | 178 | 160 | 145 | 133 | 123 | 114 | 107 | 100 | |||||||||
| 1600 | 300 | 250 | 214 | 188 | 167 | 150 | 136 | 125 | 115 | 107 | 100 | |||||||||
| 1500 | 280 | 233 | 200 | 175 | 156 | 140 | 127 | 117 | 108 | 100 | ||||||||||
| 1400 | 260 | 217 | 186 | 163 | 144 | 130 | 118 | 108 | 100 | |||||||||||
| 1300 | 300 | 240 | 200 | 171 | 150 | 133 | 120 | 109 | 100 |
As can be seen from table 6 above, only S-200 mm repeats in a straight wall segment of odd length prefabricated (with one side second edge member). So that the building modulus (M) is met0100mm), and the same spacing of the reinforcing steel bars which are simple and easy to identify and meet the specification requirement is 200 mm.
Correspondingly, the common prefabricated wall lengths of the wall body prefabricated with the second edge member on one side in the common in-line wall section are 2500mm, 2300mm, 2100mm, 1900mm, 1700mm, 1500mm and 1300mm, which are all odd clear wall lengths.
When the prefabricated wall section is designed, the length of the prefabricated wall section of the wall body containing the second edge member on one side can be the length of the prefabricated wall sections, and the same interval of the longitudinal ribs is 200 mm. Therefore, the processing design of the components is simplified, the types of the lengths of the prefabricated wall sections are reduced, rib holes of upper and lower molds of the prefabricated wall sections are unified, the standardization of the upper and lower molds is formed, part of the molds can be recycled to the maximum extent, the construction cost of the components is reduced, the construction is convenient, the building industrialization and the automation are further promoted, and a certain effect on promoting emission reduction is achieved.
In fact, we can also get the same result from the lengths of the common wall segments of the cast-in-place straight type 2900mm, 2700mm, 2500mm, 2300mm, 2100mm, 1900mm, 1700mm minus the length of the edge member on side 1400 mm, and the lengths of the common prefabricated wall segments are still 2500mm, 2300mm, 2100mm, 1900mm, 1700mm, 1500mm, 1300mm, 1100mm, 900 mm.
In summary, the net wall length and the longitudinal steel bar spacing of the cast-in-place shear wall are shown in table 7, and the net wall length and the steel bar spacing of the precast shear wall are shown in table 8.
TABLE 7
TABLE 8
The length of the wall section is designed to meet the use function and calculation requirements, and meanwhile, the length numbers are selected, so that the multiple types such as 1600, 1650, 1750, 1800, 1850, 1950 and the like are avoided, and the length types of the wall section are simplified. (the alternative number is reduced 2/3 for example for understanding). Meanwhile, the same interval of the longitudinal ribs matched with the length of the wall section is 200 mm. Therefore, the processing design of the components is simplified, the types of the lengths of the prefabricated wall sections are reduced, rib holes of upper and lower molds of the prefabricated wall sections are unified, the standardization of the upper and lower molds is formed, part of the molds can be recycled to the maximum extent, the construction cost of the components is reduced, the construction is convenient, the building industrialization and the automation are further promoted, and a certain effect on promoting emission reduction is achieved.
The derivation can be carried out according to the range that b is more than or equal to 160mm and less than or equal to 300mm, most high-rise shear wall buildings can be met, and when b is more than 300mm, similar results can be obtained according to the principle.
The wall body (longitudinal reinforcement value is less than or equal to 1964 mm) is the common part (non-bottom reinforced part) of the shear wall2) Concluding, the edge members of the wall section at the bottom reinforcement site can be referred to for use.
When the shear wall seismic grade is three-level and four-level, an edge component L is constructed1、L2、L3、L4The same distance between longitudinal reinforcing bars within the length range is also 200 mm; when the building is in first-level and second-level earthquake-resistant grade, the length of the wall section (including cast-in-place and prefabricated) is L0、LyzThe length of the outer edge member and the reinforcing bars are simply changed correspondingly.
Engineering design: when the structure is arranged, the wall bodies are sorted and classified according to the length of the cast-in-place common wall section, the wall length types are reduced, and longitudinal bars are arranged at the same equal interval @ 200; during assembly and assembly, according to the wall body with the arranged structure, the split design is carried out according to the length of the prefabricated common wall section; the member deepening processing drawing is carried out according to the split prefabricated wall body, and longitudinal ribs are arranged at equal intervals of @200 mm.
Through above cast-in-place wall section length commonly used, prefabricated wall section length commonly used, and same equidistant S ═ 200mm vertical reinforcing bar arrange, realized that shear force wall (including prefabricated) wall section length commonly used and vertical muscle unify this simple and practical' S way of going out the muscle. Promotes the standardized industrialization process of structural design, assembly and production of components.
The wall length design method of the prefabricated shear wall has the following technical effects:
(1) the shear wall adopts standard common wall length and longitudinal bars arranged at uniform intervals, so that the design of structural members tends to be standardized, the problems that the length and the size of wall limbs are too scattered and various types of prefabrication are solved, a standardized foundation is provided for assembly design, and the field construction is facilitated.
(2) The prefabricated shear wall longitudinal ribs are arranged uniformly and equidistantly in an S-200 mm mode, the types and the number of the dies are reduced, the die utilization rate of a component factory is improved, the dies and the engineering cost are saved, the construction quality of the upper wall and lower wall connecting part is further guaranteed, the working efficiency of production workers is improved, and the time cost is saved.
(3) The shear wall standard common wall length and longitudinal ribs are uniformly arranged at equal intervals S, namely 200mm, the stress performance of the structure is not changed, the safety and reliability of structural members can be guaranteed, the popularization and application values are good, the standardization rate of the assembly type building is promoted, the market demand for the supermarket attribute of the prefabricated members is preliminarily improved, the construction efficiency and the quality are also guaranteed, the construction difficulty of the wall body is improved, the internal benign competition of the industry can be promoted, and the sustainable development of the society is realized.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A wall length design method of a shear wall is characterized by comprising the following steps:
constructing the relation between the net wall length and the longitudinal steel bar spacing of different types of shear walls containing edge members;
determining the clear wall length ranges of different types of shear walls;
determining the same value of the longitudinal steel bar spacing according to the relation between the clear wall length and the longitudinal steel bar spacing of different types of shear walls containing edge members and the clear wall length range;
and determining the standard common wall length of the shear walls of different types according to the same value of the longitudinal steel bar spacing.
2. The method for designing the wall length of the shear wall according to claim 1, wherein the relationship between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing L-shaped and T-shaped cast-in-place shear walls0The distance relation between the longitudinal steel bars is L0＝L1+D+n*S+D+L2(1)；
Wherein L is1The length of the edge member at the intersection of the inner side walls of the L-shaped cast-in-place shear wall and the T-shaped cast-in-place shear wall is part of the length of the edge member;
L2the length of the edge member arranged at the end in the shape of a straight line outside the L-shaped cast-in-place shear wall and the T-shaped cast-in-place shear wall;
d is the length from the center of a first longitudinal steel bar in the L-shaped and T-shaped cast-in-situ shear walls to the edge of the wall;
n is the number of longitudinal steel bar intervals in the shear wall;
and S is the distance between the longitudinal steel bars in the shear wall.
3. The method as claimed in claim 2, wherein the determining the net wall length ranges of the different types of shear walls specifically comprises:
determining net wall length L of L-shaped and T-shaped cast-in-place shear walls0The range is 1500-3000 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining L according to design specification requirements1、L2And D is taken as the value;
according to the formula (1), L1、L2D and L0The same value of the longitudinal steel bar spacing S in the L-shaped shear wall and the T-shaped shear wall is obtained.
4. The method for designing the wall length of the shear wall according to claim 1, wherein the relationship between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing L-shaped and T-shaped prefabricated shear walls without edge membersyzThe distance relation between the longitudinal steel bars is Lyz＝L0-L1-L2＝D+n*S+D(2)；
The determining of the clear wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of L-shaped and T-shaped prefabricated shear walls without edge membersyzThe range is 800-2300 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining the value of D according to the design specification requirement;
according to the formula (2), the value of D and LyzThe same value of the longitudinal steel bar spacing S in the L-shaped precast shear wall and the T-shaped precast shear wall without the edge members is obtained.
5. The method for designing the wall length of the shear wall according to claim 1, wherein the relationship between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing L-shaped and T-shaped prefabricated shear walls with edge components at outer side I-shaped endsyzThe distance relation between the longitudinal steel bars is Lyz＝L0-L1＝D+n*S+D(3)；
The determining of the clear wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of L-shaped and T-shaped prefabricated shear walls with edge components at outer side I-shaped endsyzThe range is 1200-2700 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining the value of D according to the design specification requirement;
according to the formula (3), the value of D and LyzThe same value of the space S of the longitudinal steel bars in the L-shaped precast shear wall and the T-shaped precast shear wall containing the edge component with the outer side end is obtained.
6. The method for designing the wall length of the shear wall according to claim 1, wherein the relationship between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing linear cast-in-place shear wall0The distance relation between the longitudinal steel bars is L0＝L3+D+n*S+D+L4(4)；
Wherein L is3The length of an edge member arranged on one side of the linear cast-in-place shear wall;
L4the length of an edge member arranged on the other side of the linear cast-in-place shear wall;
d is the length from the center of a first longitudinal steel bar in the in-line cast-in-place shear wall to the edge of the wall;
n is the number of longitudinal steel bar intervals in the shear wall;
and S is the distance between the longitudinal steel bars in the shear wall.
7. The method as claimed in claim 6, wherein the determining the net wall length ranges of the different types of shear walls specifically comprises:
determining net wall length L of linear cast-in-place shear wall0The range is 1700-3000 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining L according to design specification requirements3、L4And D is taken as the value;
according to the formula (4), L3、L4D and L0The same value of the longitudinal steel bar spacing S in the straight shear wall is obtained.
8. The method for designing the wall length of the shear wall according to claim 1, wherein the relationship between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing linear prefabricated shear wall without edge membersyzThe distance relation between the longitudinal steel bars is Lyz＝L0-L3-L4＝D+n*S+D(5)；
The determining of the clear wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of prefabricated shear wall in straight line shape without edge componentsyzThe range is 900-2200 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining the value of D according to the design specification requirement;
according to the formula (5), the value of D and LyzThe same value of the longitudinal steel bar spacing S in the linear prefabricated shear wall without the edge component is obtained.
9. The method for designing the wall length of the shear wall according to claim 1, wherein the relationship between the net wall length and the longitudinal steel bar spacing for constructing the different types of shear walls with the edge members specifically comprises:
net wall length L for constructing linear prefabricated shear wall with side edge componentyzThe distance relation between the longitudinal steel bars is Lyz＝L0-L3＝L0-L4＝D+n*S+D(6)；
The determining of the clear wall length ranges of the different types of shear walls specifically includes:
determining net wall length L of linear prefabricated shear wall with side edge componentyzThe range is 1300-2600 mm;
the determining the same value of the longitudinal steel bar spacing according to the relation between the net wall length and the longitudinal steel bar spacing of the shear walls of different types and the net wall length range specifically comprises the following steps:
determining the value of D according to the design specification requirement;
according to the formula (6), the value of D and LyzThe same value of the longitudinal steel bar spacing S in the linear prefabricated shear wall with the side edge component is obtained.
10. The method for designing the wall length of the shear wall according to claim 1,
the same value of the longitudinal steel bar spacing is 200 mm;
the standard common wall lengths of the L-shaped and T-shaped cast-in-place shear walls are 1600mm, 1800mm, 2000mm, 2200mm, 2400mm, 2600mm, 2800mm and 3000 mm;
the standard common wall length of the L-shaped prefabricated shear wall and the T-shaped prefabricated shear wall without the edge members is 900mm, 1100mm, 1300mm, 1500mm, 1700mm, 1900mm, 2100mm and 2300 mm;
the standard common wall length of the prefabricated shear wall with the L-shaped and T-shaped outer edge components is 1300mm, 1500mm, 1700mm, 1900mm, 2100mm, 2300mm, 2500mm and 2700 mm;
the standard common wall length of the straight cast-in-place shear wall is 1700mm, 1900mm, 2100mm, 2300mm, 2500mm, 2700mm and 2900 mm;
the standard common wall length of the I-shaped prefabricated shear wall without the edge members is 900mm, 1100mm, 1300mm, 1500mm, 1700mm, 1900mm and 2100 mm;
standard common wall lengths of the I-shaped prefabricated shear wall with the outer edge members are 1300mm, 1500mm, 1700mm, 1900mm, 2100mm, 2300mm and 2500 mm.
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