CN114673073A - Chord member structure and system for steel truss-concrete combined structure - Google Patents
Chord member structure and system for steel truss-concrete combined structure Download PDFInfo
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- CN114673073A CN114673073A CN202210324716.1A CN202210324716A CN114673073A CN 114673073 A CN114673073 A CN 114673073A CN 202210324716 A CN202210324716 A CN 202210324716A CN 114673073 A CN114673073 A CN 114673073A
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- 239000004567 concrete Substances 0.000 title claims abstract description 102
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 83
- 239000010959 steel Substances 0.000 title claims abstract description 83
- 238000010276 construction Methods 0.000 claims abstract description 34
- 239000002131 composite material Substances 0.000 claims abstract description 29
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 238000010008 shearing Methods 0.000 description 6
- 125000001140 1,4-phenylene group Chemical group [H]C1=C([H])C([*:2])=C([H])C([H])=C1[*:1] 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
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Abstract
The invention discloses a chord member structure and a chord member system for a steel truss-concrete composite structure, which belong to the technical field of bridge engineering and comprise a lower flange plate, a plurality of upper flange plates, webs with the same number as the upper flange plates, and a plurality of PBL shear key components, wherein a plurality of first shear nails are fixed on the lower flange plate; a plurality of second shear nails are fixed on the upper flange plate; the web plate comprises a lower end, middle sections and an upper end, each web plate is fixedly connected with the lower flange plate through the lower end, the web plate is fixedly connected with the corresponding upper flange plate through the upper end, the lower end is perpendicular to the lower flange plate, the upper end is perpendicular to the upper flange plate, and the PBL shear key components penetrate through the middle sections respectively, so that the middle sections are connected through the PBL shear key components. The invention can improve the binding capacity between steel and concrete, and has the advantages of convenient construction and easy quality guarantee.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a chord member structure and a chord member system for a steel truss-concrete combined structure.
Background
The steel and concrete combined structure is a structure which combines a steel component and concrete or reinforced concrete components into a whole to work together, and has some characteristics of a steel structure and a reinforced concrete structure. At present, for the chord member structure of a steel truss-concrete combined structure, two main modes are available: the first mode is a chord member structure of a traditional steel truss girder, which is generally a box-shaped section, and a shear nail is arranged on an upper flange plate to be combined with concrete; the second method is to use a box structure with holes on the top plate and the side plate, the top plate and the side plate are embedded in concrete, and a PBL shear key is formed by penetrating steel bars in the holes of the steel plate and is combined with the concrete. However, the first method uses a large amount of steel, and does not show the advantages of the truss composite beam. If the flange of the concrete combined with the chord member is thick, the height of the common shear nail needs to be higher than the neutral axis of the flange in order to meet the requirement of shearing resistance, so that the shear nail with larger height needs to be arranged on the upper flange. The shear nails need to be customized, even welded or mechanically connected to be lengthened, which is relatively wasteful and inconvenient to construct. In addition, the chord height of the truss web type combination beam is smaller than that of a common steel truss beam, the internal space is narrow, and the welding construction of the partition plates in the box-shaped chord is difficult. In the second mode, concrete placement is difficult to compact. Although the top plate and the side plates are provided with holes, the holes are still closed sections, and cavities are easily formed at inner corner points. Therefore, the bonding capacity between the steel and the concrete is poor, the construction is inconvenient, and the quality is not easy to guarantee.
In conclusion, in the existing bridge engineering technology, the technical problems of poor binding capacity between steel and concrete, inconvenient construction and difficult quality guarantee exist.
Disclosure of Invention
The invention aims to solve the technical problems that the bonding capacity between steel and concrete is poor, the construction is inconvenient and the quality is not easy to ensure.
In order to solve the above technical problems, the present invention provides a chord member structure for a steel truss-concrete composite structure, comprising: the shear connector comprises a lower flange plate, a plurality of upper flange plates, webs with the same number as the upper flange plates, and a plurality of PBL shear key components, wherein a plurality of first shear nails are fixed on the lower flange plate; a plurality of second shear nails are fixed on the upper flange plate; the web plate comprises a lower end, middle sections and an upper end, each web plate is fixedly connected with the lower flange plate through the lower end, the web plate is fixedly connected with the corresponding upper flange plate through the upper end, the lower end is perpendicular to the lower flange plate, the upper end is perpendicular to the upper flange plate, the PBL shear key components penetrate through the middle sections respectively, so that the middle sections are connected through the PBL shear key components, the PBL shear key components are distributed along the length extending direction of the lower flange plate, and the lower flange plate, the upper flange plates and the web plate form a space for pouring a concrete structure.
Further, still include: the side plate is connected with the lower flange plate and is perpendicular to the lower flange plate.
Further, the plurality of upper flange plates includes a first upper flange plate and a second upper flange plate; the webs with the same number as the plurality of upper flange plates comprise a first web and a second web, the first web comprises a first lower end, a first middle section and a first upper end, the first middle section is provided with a plurality of first holes, the first lower end is connected with the lower flange plate, and the first upper end is connected with the first upper flange plate; the second web comprises a second lower end, a second middle section and a second upper end, a plurality of second holes are formed in the second middle section, the second lower end is connected with the lower flange plate, the second upper end is connected with the second upper flange plate, and the PBL shear key component penetrates through the first holes and the corresponding second holes.
Furthermore, a plurality of PBL shear key components are distributed at equal intervals, and each PBL shear key component comprises a steel bar.
Further, the first upper flange plate and the first upper end are in an inverted L shape; the second upper flange plate and the second upper end are in an inverted L shape.
Further, the first upper flange plate and the first upper end are T-shaped; the second upper flange plate and the second upper end are T-shaped.
Further, the first upper end is fixed at the center of the first upper flange plate; the second upper end is fixed at the center of the second upper flange plate.
Further, the width of the lower flange plate ranges from 800mm to 2000mm in value; the sum of the lengths of the lower end, the middle section and the upper end is in the range of 300mm to 1000 mm.
Further, the width of the upper flange plate is less than one-half times the width of the lower flange plate.
According to yet another aspect of the present invention, there is also provided a chord system for a steel truss-concrete composite structure, comprising a concrete structure cast in a space formed by the lower flange plate, the plurality of upper flange plates and the web, and further comprising the chord structure for a steel truss-concrete composite structure.
Has the advantages that:
the invention provides a chord member structure for a steel truss-concrete combined structure. Each web plate is fixedly connected with the lower flange plate through a lower end, the web plate is fixedly connected with the corresponding upper flange plate through an upper end, the lower end and the lower flange plate are mutually perpendicular, a plurality of PBL (Poly-p-phenylene Ben-L) shear key components respectively penetrate through the middle section of each web plate, so that each middle section is connected through the PBL shear key components, the PBL shear key components are distributed along the length extending direction of the lower flange plate, and the lower flange plate, the upper flange plates and the web plate form a space for pouring a concrete structure. The lower flange plate can serve as a bottom die for pouring concrete, the upper flange is divided into two limbs, the opening section is convenient for pouring the concrete, and the shearing resistance between steel and the concrete is improved. After the upper flange plate and the lower flange plate are connected through the web plate, the PBL shear keys are formed through the PBL shear key components and the web plate, and the PBL shear keys and the first shear pins and the second shear pins form a hybrid shear connection key, so that the improvement of the connection performance between steel and concrete is facilitated. In the chord member steel structure, each web and one corresponding upper flange plate form a section with an inverted pi-shaped opening on the lower flange plate, and the inverted pi-shaped section can provide enough rigidity and stability to meet the stress requirement before combination with concrete, so that construction is convenient. And then, the binding capacity between steel and concrete can be improved, the construction is convenient, and the quality is easy to ensure. Therefore, the technical effects that the binding capacity between steel and concrete can be improved, the construction is convenient and fast, and the quality is easy to guarantee are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a first schematic view of a chord member structure for a steel truss-concrete combined structure according to an embodiment of the present invention;
FIG. 2 is a second schematic view of a chord member configuration for a steel truss-concrete composite structure according to an embodiment of the present invention;
fig. 3 is a third schematic view of a chord member structure for a steel truss-concrete composite structure according to an embodiment of the present invention.
Detailed Description
The invention discloses a chord member structure for a steel truss-concrete combined structure, which is characterized in that a plurality of first shear nails 11 are fixed on a lower flange plate 1, and a plurality of second shear nails 23 are fixed on an upper flange plate. Each web is fixedly connected with the lower flange plate 1 through a lower end, the web is fixedly connected with the corresponding upper flange plate through an upper end, the lower end is perpendicular to the lower flange plate 1, a plurality of PBL (Poly-p-phenylene Ben) shear key components 4 respectively penetrate through the middle section of each web, so that each middle section is connected through the PBL shear key components 4, the PBL shear key components 4 are distributed along the length extending direction of the lower flange plate 1, and the lower flange plate 1, the upper flange plates and the web form a space for pouring a concrete structure 5. The lower flange plate 1 can serve as a bottom die for pouring concrete, the upper flange is divided into two limbs, the opening section is convenient for pouring the concrete, and the shearing resistance between steel and the concrete is increased. After the upper flange plate and the lower flange plate 1 are connected through the web plate, a PBL shear connector is formed through the PBL shear connector components 4 and the web plate, and a hybrid shear connector is formed with the first shear connectors 11 and the second shear connectors 23, so that the connection performance between steel and concrete is improved. In the chord member steel structure, each web and one corresponding upper flange plate form a section with an inverted pi-shaped opening on the lower flange plate 1, and the inverted pi-shaped section can provide enough rigidity and stability to meet the stress requirement before combination with concrete, so that construction is convenient. And then, the binding capacity between steel and concrete can be improved, the construction is convenient, and the quality is easy to ensure. Thereby reached and to have promoted the combining ability between steel and the concrete, it is convenient to be under construction, the technical effect that the quality is easily guaranteed.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention; the "and/or" keyword referred to in this embodiment represents sum or two cases, in other words, a and/or B mentioned in the embodiment of the present invention represents two cases of a and B, A or B, and describes three states where a and B exist, such as a and/or B, which represents: only A does not include B; only B does not include A; including A and B.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments. Spatially relative terms, such as "below," "above," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "lower" would then be oriented "upper" other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Also, in embodiments of the invention where an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.
Example one
Referring to fig. 1, 2 and 3, fig. 1 is a first schematic diagram of a chord structure for a steel truss-concrete composite structure according to an embodiment of the present invention, fig. 2 is a second schematic diagram of a chord structure for a steel truss-concrete composite structure according to an embodiment of the present invention, and fig. 3 is a third schematic diagram of a chord structure for a steel truss-concrete composite structure according to an embodiment of the present invention. The chord member structure for the steel truss-concrete composite structure provided by the embodiment of the invention comprises a lower flange plate 1, a plurality of upper flange plates, webs with the same number as the upper flange plates and a plurality of PBL shear key components 4, wherein the lower flange plate 1, the upper flange plates, the webs with the same number as the upper flange plates and the PBL shear key components 4 are respectively explained in detail:
for the lower flange plate 1 and a plurality of upper flange plates:
a plurality of first shear nails 11 are fixed on the lower flange plate 1; the width of the lower flange plate 1 has a value ranging from 800mm to 2000 mm. A plurality of second shear nails 23 are fixed on the upper flange plate; the width of the upper flange plate is less than half the width of the lower flange plate 1, and as shown in fig. 1, the width of the first upper flange plate 21 may be b, and then b < (1/2 × L). The plurality of upper flange plates includes a first upper flange plate 21 and a second upper flange plate 22. Wherein the first upper flange plate 21 and the first upper end 313 present an inverted L-shape; the second upper flange plate 22 and the second upper end 323 present an inverted L-shape. The first upper flange plate 21 and the first upper end 313 are T-shaped; the second upper flange plate 22 and the second upper end 323 are T-shaped. The first upper end 313 is fixed at the center of the first upper flange plate 21; the second upper end 323 is fixed at the center of the second upper flange plate 22.
Specifically, the plurality of first shear nails 11 may refer to 1 first shear nail 11, 2 first shear nails 11, 3 first shear nails 11, and the like. The first shear pin 11 may be a shear pin, and the shear pin and the lower flange plate 1 are used by penetration welding. The first shear nail 11 is vertical to the lower flange plate 1. As shown in FIG. 1, the width of the lower flange plate 1 is L, wherein L is more than or equal to 800mm and less than or equal to 2000 mm. The plurality of upper flange plates may refer to 1 upper flange plate, 2 upper flange plates, 3 upper flange plates, etc., and the upper flange plates may be perpendicular to the web plate or not. The upper flange plate is fixedly connected with the web plate, and the section of the upper flange plate after being connected with the web plate can be in a T shape, or the section of the upper flange plate after being connected with the web plate can be in an inverted L shape. When the cross section of the upper flange plate and the web plate after being connected is T-shaped, the web plate can be fixed at the center of the upper flange plate, and the lengths of the upper flange plate relative to the two ends of the web plate are equal. Or the web plate can be fixed at the position deviated from the center of the upper flange plate, and the lengths of the upper flange plate relative to the two ends of the web plate are unequal. The number of the upper flange plates may be 2, the 2 upper flange plates are respectively a first upper flange plate 21 and a second upper flange plate 22, and the first upper flange plate 21 and the second upper flange plate 22 may be parallel to the lower flange plate 1.
For the same number of webs as a plurality of said upper flange plates:
the web plate comprises a lower end, middle sections and an upper end, each web plate is fixedly connected with the lower flange plate 1 through the lower end, the web plate is fixedly connected with the corresponding upper flange plate through the upper end, the lower end is perpendicular to the lower flange plate 1, the upper end is perpendicular to the upper flange plate, the web plates with the same number as the plurality of upper flange plates comprise a first web plate 31 and a second web plate, the first web plate 31 comprises a first lower end 311, a first middle section 312 and a first upper end 313, the first middle section 312 is provided with a plurality of first holes, the first lower end 311 is connected with the lower flange plate 1, and the first upper end 313 is connected with the first upper flange plate 21; the second web comprises a second lower end 321, a second middle section 322 and a second upper end 323, the second middle section 322 is provided with a plurality of second openings, the second lower end 321 is connected with the lower flange plate 1, the second upper end 323 is connected with the second upper flange plate 22, and the PBL shear key component 4 penetrates through the first openings and the corresponding second openings. The sum of the lengths of the lower end, the middle section and the upper end ranges from 300mm to 1000mm, that is, as shown in fig. 1, the overall length of the first web 31 may be h, and h is greater than or equal to 300mm and less than or equal to 1000 mm.
The plurality of PBL shear key components 4 respectively penetrate through each middle section, so that each middle section is connected through the PBL shear key components 4, the plurality of PBL shear key components 4 are distributed along the length extending direction of the lower flange plate 1, the plurality of upper flange plates and the web plate form a space for pouring a concrete structure 5, and the concrete structure 5 is concrete to be poured. The PBL shear key components 4 are distributed at equal intervals, and the PBL shear key components 4 comprise reinforcing steel bars. As shown in FIG. 1, a plurality of steel bars can be distributed in parallel at equal intervals, the interval between every two adjacent steel bars can be S, and S is more than or equal to 100mm and less than or equal to 300 mm.
Specifically, the lower extreme, interlude and upper end can integrated into one piece constitute the web, the quantity of web can be 2, 2 webs can be first web 31 and second web respectively, first lower extreme 311, first interlude 312 and first upper end 313 can integrated into one piece constitute first web 31, can seted up a plurality of first trompils on first interlude 312 of first web 31, run through first trompil through the reinforcing bar, fix the reinforcing bar on first interlude 312 for wear the reinforcing bar and form PBL shear force key on first web 31. Each steel bar penetrates through the second opening of the second middle section 322 in the second web plate after penetrating through 1 first opening, the first web plate 31 and the second web plate are connected through the steel bars to form a PBL shear connector, the steel bars, the first web plate 31 and the second web plate, the first shear nails 11 and the second shear nails 23 form a hybrid shear connector to be combined with the concrete structure 5, and the shear connector in hybrid arrangement can greatly enhance the shear capacity between interfaces. Since the second web and the first web 31 have the same structure and principle, they will not be described in detail here.
The chord member structure for the steel truss-concrete composite structure further comprises a side plate, the side plate is connected with the lower flange plate 1, and the side plate is perpendicular to the lower flange plate 1.
Specifically, as shown in fig. 3, a side plate may be installed on the left side in the drawing, and after the side plate is fixedly connected to the left end of the lower flange plate 1, the lower flange plate 1 serves as a bottom mold for concrete pouring, and the side plate serves as a side mold to further facilitate construction.
In actual construction, the truss web type composite structure is different from a common composite structure in that the truss web type composite structure has great axial and shearing concentrated force at the node point for the bonding capacity between steel and concrete. The shear connectors need to be arranged centrally at the nodes and need to be deep above the neutral axis of the concrete flange to meet the shear requirements. The chord member structure of the traditional steel truss is difficult to solve the problem in structure, the stress requirement can be met only by increasing the number of shear nails at nodes and heightening the shear nails, and the manufacturing and the processing are inconvenient. To the atress problem before chord member and concrete flange combine with after combining, just for steel construction atress before chord member and the concrete flange combine, need satisfy the intensity and the stable requirement in the construction stage, as the common atress of integrated configuration after combining, the steel construction has the constraint of concrete to be difficult to the unstability, embodies integrated configuration's advantage. Therefore, the structure of the chord member needs to be balanced, the stress in the construction stage can be met, and the material waste caused by over-strong force is avoided. At present, the due advantages of a combined structure are not reflected in the amount of steel. For the problems of convenience and quality of construction, the pouring and quality of concrete are the key of success and failure, the invention provides a chord member structure for a steel truss-concrete combined structure, wherein a steel structure can serve as a template, the flowing of concrete is not influenced, and the concrete can be poured compactly. The chord member structure for the steel truss-concrete combined structure provided by the invention has the advantages of simple structure, good mechanical property, strong binding capacity between steel and concrete, convenience in construction, good economy and wide application prospect in the combined structure.
The invention provides a chord member structure for a steel truss-concrete combined structure, which is characterized in that a plurality of first shear nails 11 are fixed on a lower flange plate 1, and a plurality of second shear nails 23 are fixed on an upper flange plate. Each web is fixedly connected with the lower flange plate 1 through a lower end, the web is fixedly connected with the corresponding upper flange plate through an upper end, the lower end is perpendicular to the lower flange plate 1, a plurality of PBL (Poly-p-phenylene Ben) shear key components 4 respectively penetrate through the middle section of each web, so that each middle section is connected through the PBL shear key components 4, the PBL shear key components 4 are distributed along the length extending direction of the lower flange plate 1, and the lower flange plate 1, the upper flange plates and the web form a space for pouring a concrete structure 5. The lower flange plate 1 can serve as a bottom die for pouring concrete, the upper flange is divided into two limbs, the opening section is convenient for pouring the concrete, and the shearing resistance between steel and the concrete is improved. After the upper flange plate and the lower flange plate 1 are connected through the web plate, a PBL shear connector is formed through the PBL shear connector components 4 and the web plate, and a hybrid shear connector is formed with the first shear connectors 11 and the second shear connectors 23, so that the connection performance between steel and concrete is improved. In the chord member steel structure, each web and one corresponding upper flange plate form a section with an inverted pi-shaped opening on the lower flange plate 1, and the inverted pi-shaped section can provide enough rigidity and stability to meet the stress requirement before combination with concrete, so that construction is convenient. And then, the binding capacity between steel and concrete can be improved, the construction is convenient, and the quality is easy to ensure. Therefore, the technical effects that the binding capacity between steel and concrete can be improved, the construction is convenient and fast, and the quality is easy to guarantee are achieved.
In order to explain the chord member system for the steel truss-concrete combined structure in detail, the embodiment explains the chord member structure for the steel truss-concrete combined structure in detail, and based on the same inventive concept, the application also provides a chord member system for the steel truss-concrete combined structure, which is detailed in embodiment two.
Example two
The second embodiment of the invention provides a chord system for a steel truss-concrete composite structure, which comprises a concrete structure 5 and the chord structure for the steel truss-concrete composite structure, wherein the concrete structure 5 is poured in a space formed by the lower flange plate 1, the plurality of upper flange plates and the web plate.
The invention provides a chord system for a steel truss-concrete composite structure, wherein a plurality of first shear nails 11 are fixed on a lower flange plate 1, and a plurality of second shear nails 23 are fixed on an upper flange plate. Each web is fixedly connected with the lower flange plate 1 through a lower end, the web is fixedly connected with the corresponding upper flange plate through an upper end, the lower end is perpendicular to the lower flange plate 1, a plurality of PBL (Poly-p-phenylene Ben) shear key components 4 respectively penetrate through the middle section of each web, so that each middle section is connected through the PBL shear key components 4, the PBL shear key components 4 are distributed along the length extending direction of the lower flange plate 1, and the lower flange plate 1, the upper flange plates and the web form a space for pouring a concrete structure 5. The lower flange plate 1 can serve as a bottom die for pouring concrete, the upper flange is divided into two limbs, the opening section is convenient for pouring the concrete, and the shearing resistance between steel and the concrete is improved. After the upper flange plate and the lower flange plate 1 are connected through the web plate, a PBL shear connector is formed through the PBL shear connector components 4 and the web plate, and a hybrid shear connector is formed with the first shear connectors 11 and the second shear connectors 23, so that the connection performance between steel and concrete is improved. In the chord member steel structure, each web and one corresponding upper flange plate form a section with an inverted pi-shaped opening on the lower flange plate 1, and the inverted pi-shaped section can provide enough rigidity and stability to meet the stress requirement before combination with concrete, so that construction is convenient. And then, the binding capacity between steel and concrete can be improved, the construction is convenient, and the quality is easy to ensure. Therefore, the technical effects that the binding capacity between steel and concrete can be improved, the construction is convenient and fast, and the quality is easy to guarantee are achieved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A chord construction for a steel truss-concrete composite structure, comprising: the shear connector comprises a lower flange plate, a plurality of upper flange plates, webs with the same number as the upper flange plates, and a plurality of PBL shear key components, wherein a plurality of first shear nails are fixed on the lower flange plate; a plurality of second shear nails are fixed on the upper flange plate; the web plate comprises a lower end, middle sections and an upper end, each web plate is fixedly connected with the lower flange plate through the lower end, the web plate is fixedly connected with the corresponding upper flange plate through the upper end, the lower end is perpendicular to the lower flange plate, the upper end is perpendicular to the upper flange plate, the PBL shear key components penetrate through the middle sections respectively, so that the middle sections are connected through the PBL shear key components, the PBL shear key components are distributed along the length extending direction of the lower flange plate, and the lower flange plate, the upper flange plates and the web plate form a space for pouring a concrete structure.
2. The chord construction for a steel truss-concrete composite structure as claimed in claim 1, further comprising: the side plate is connected with the lower flange plate and is perpendicular to the lower flange plate.
3. The chord member construction for a steel truss-concrete composite structure as claimed in claim 1, wherein: the plurality of upper flange plates comprises a first upper flange plate and a second upper flange plate; the webs with the same number as the plurality of upper flange plates comprise a first web and a second web, the first web comprises a first lower end, a first middle section and a first upper end, the first middle section is provided with a plurality of first holes, the first lower end is connected with the lower flange plate, and the first upper end is connected with the first upper flange plate; the second web comprises a second lower end, a second middle section and a second upper end, a plurality of second holes are formed in the second middle section, the second lower end is connected with the lower flange plate, the second upper end is connected with the second upper flange plate, and the PBL shear key component penetrates through the first holes and the corresponding second holes.
4. A chord member construction for a steel truss-concrete composite structure as claimed in claim 3 wherein: the PBL shear key components are distributed at equal intervals and comprise reinforcing steel bars.
5. A chord member construction for a steel truss-concrete composite structure as claimed in claim 3 wherein: the first upper flange plate and the first upper end are in an inverted L shape; the second upper flange plate and the second upper end are in an inverted L shape.
6. A chord member construction for a steel truss-concrete composite structure as claimed in claim 3 wherein: the first upper flange plate and the first upper end are T-shaped; the second upper flange plate and the second upper end are T-shaped.
7. A chord member construction for a steel truss-concrete composite structure as claimed in claim 3 wherein: the first upper end is fixed at the center of the first upper flange plate; the second upper end is fixed at the center of the second upper flange plate.
8. The chord member construction for a steel truss-concrete composite structure as claimed in claim 1, wherein: the width of the lower flange plate ranges from 800mm to 2000mm in value; the sum of the lengths of the lower end, the middle section and the upper end is in the range of 300mm to 1000 mm.
9. The chord member construction for a steel truss-concrete composite structure as claimed in claim 1, wherein: the width of the upper flange plate is less than one-half times the width of the lower flange plate.
10. A chord system for a steel truss-concrete composite structure comprising a concrete structure, characterized by further comprising the chord structure for a steel truss-concrete composite structure as claimed in any one of claims 1 to 9, said concrete structure being cast in the space formed by said lower flange plate, said plurality of upper flange plates and said web.
Priority Applications (1)
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