CN114250912A - Prefabricated section steel concrete column and composite structure - Google Patents
Prefabricated section steel concrete column and composite structure Download PDFInfo
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- CN114250912A CN114250912A CN202111650582.4A CN202111650582A CN114250912A CN 114250912 A CN114250912 A CN 114250912A CN 202111650582 A CN202111650582 A CN 202111650582A CN 114250912 A CN114250912 A CN 114250912A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/32—Columns; Pillars; Struts of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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Abstract
The invention provides a prefabricated steel reinforced concrete column and a combined structure, wherein the prefabricated steel reinforced concrete column comprises: the device comprises a plurality of upright posts extending in parallel, wherein each upright post comprises a plurality of coaxially extending post bodies and a connecting structure; two adjacent column bodies are connected with each other through a connecting structure in a coaxial mode; the bottom end of each upright post is connected with a post base, the post bases are matched in a cup foundation, and a plurality of upright posts extend upwards from the post bases; each column body comprises axially extending profile steel, two steel plates arranged at two ends of the profile steel and extending transversely, two first angle steels arranged at the peripheral edges of the opposite side surfaces of the two steel plates, and a plurality of longitudinal ribs coaxially extending outside the profile steel, penetrating through the steel plates and fixedly connected with the first angle steels; each connecting structure comprises a plurality of extrusion sleeves, and two adjacent longitudinal ribs are coaxially connected through one extrusion sleeve; each column foot comprises a transversely extending bottom plate, a reinforcing steel sleeve fixedly connected to the bottom plate and extending upwards, an anchor bolt in threaded connection with the bottom plate, mortar arranged below the bottom plate, and second concrete arranged between the outside of the reinforcing steel sleeve and the cup rim foundation.
Description
Technical Field
The invention relates to the field of fixed buildings, in particular to a prefabricated steel reinforced concrete column and a combined structure.
Background
Steel Reinforced Concrete (SRC) columns are widely used in high-rise and large-span buildings due to their high load-bearing capacity, good earthquake-resistant performance, and excellent durability. But it is cast in situ, and the reinforcing bar engineering is consuming time for a long time, and artifical man-hour consumes greatly, and the efficiency of construction is low, and construction cost increases.
Therefore, it is desirable to provide a new prefabricated steel reinforced concrete column and a composite structure.
Disclosure of Invention
The purpose of the invention is as follows: the utility model provides a prefabricated shaped steel concrete column and integrated configuration for solve current shaped steel concrete column and adopt the cast in situ to lead to the low and with high costs problem of efficiency of construction, carry out brand-new concatenation assembly design through column base, shaft and the connection structure of stand, can realize the prefabricated erection joint of shaped steel concrete column.
The technical scheme is as follows: a prefabricated steel reinforced concrete column comprising: the device comprises a plurality of upright posts extending in parallel, wherein each upright post comprises a plurality of coaxially extending post bodies and a connecting structure; two adjacent column bodies are coaxially connected through a connecting structure; the bottom end of each upright post is connected with a post base, the post bases are matched in a cup foundation, and a plurality of upright posts extend upwards from the post bases; each column body comprises axially extending profile steel, two transversely extending steel plates respectively arranged at two ends of the profile steel, two first angle steels arranged at the peripheral edges of the opposite side surfaces of the two steel plates, and a reinforcement cage coaxially extending to the periphery of the profile steel; the steel reinforcement cage comprises a plurality of longitudinal bars which extend axially, penetrate through the steel plate and are fixedly connected with the first angle steel; each connecting structure comprises a plurality of extrusion sleeves, a baffle plate surrounding the longitudinal ribs, reinforcing angle steel attached to the peripheral outer surface of the baffle plate, and a split screw connected to the reinforcing angle steel on the opposite side; the longitudinal ribs of two adjacent column bodies are coaxially connected through an extrusion sleeve, and the opposite-pulling screw rods are used for driving the reinforcing angle steel to tightly press the baffle; each column foot comprises a base plate extending transversely, a reinforcing steel sleeve fixedly connected to the base plate and extending upwards, an anchor bolt penetrating through the base plate from bottom to top and connected with the base plate through threads, mortar fixedly arranged below the base plate, and second concrete arranged between the outside of the reinforcing steel sleeve and the cup rim foundation; the section steel of the upright post extends downwards and is fixedly arranged on the upper surface of the bottom plate.
Further, the shaft still includes: the second angle steel extends outwards from four corners of the two steel plates; two adjacent column bodies of each upright column are coaxially connected through second angle steel.
Further, each column base further comprises: the first pegs are fixedly connected to the outer surface of the section steel; the second studs are fixedly connected between the outer surface of the reinforced steel sleeve and the cup rim foundation; and the stiffening ribs are fixedly arranged on the reinforced steel sleeve and the bottom plate.
Further, the section steel is a structural member formed by two I-shaped steels in a crossed and staggered manner; the first angle steel, the second angle steel and the connection mode of the section steel and the steel plate are all welded; two adjacent column bodies are welded through first angle steel; two adjacent column bodies are welded through section steel; the longitudinal bar of each column body is welded with the first angle steel of the column body through an angle welding seam; the reinforced steel sleeve and the section steel are welded on the upper surface of the bottom plate; the stiffening ribs are welded with the reinforcing steel sleeve and the bottom plate; the upper end of the anchor bolt penetrates through the bottom plate and is in threaded connection with a nut for fastening the bottom plate.
Furthermore, a feed inlet penetrating through the baffle plate is formed in the lower end of the baffle plate, and an exhaust hole penetrating through the baffle plate is formed in the upper end of the baffle plate.
Furthermore, each reinforcement cage further comprises first concrete and a plurality of hooping surrounding and sleeved outside the longitudinal bars.
Furthermore, the cross section of the reinforced steel sleeve is equal to the cross section of the column body in size.
Furthermore, each longitudinal bar extending from the bottom end of each upright post is fixedly connected to the upper surface of the bottom plate through a threaded sleeve.
Furthermore, the second concrete is provided with a protective layer, the second concrete is higher than the reinforcing steel sleeve, and the height difference is used as the thickness of the protective layer.
The invention also provides a combined structure, which comprises the prefabricated steel reinforced concrete column, and further comprises: locate the girder steel of the parallel extension of multilayer of rim of a cup basis top, girder steel and interlayer are passed along the axial to many parallel extension's stand.
Has the advantages that: prefabricated shaped steel concrete column and integrated configuration, utilize many parallel extensions's stand, every stand includes shaft, the connection structure of many coaxial extensions, through a connection structure coaxial coupling between two adjacent shaft, a column base is connected to the shaft of stand bottom, the column base adaptation is in a cup of mouth basis, realizes the dry-type connection of the full assembly ization of prefabricated shaped steel concrete column, can solve and adopt the cast-in-place to lead to the low and with high costs problem of efficiency of construction, saves man-hour.
Drawings
FIG. 1 is a schematic view of a composite structure according to the present invention;
FIG. 2 is a schematic cross-sectional view of the shaft of FIG. 1;
FIG. 3 is an elevational view of the connection of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the connection of FIG. 3;
FIG. 5 is a schematic illustration of a post-infusion method of the connection structure;
FIG. 6 is a schematic cross-sectional view of the column shoe of FIG. 1;
FIG. 7 is a sectional view of the assembly of the column base in the cup base;
FIG. 8 is a schematic representation of the cross-sectional feature size of the connection of FIG. 4;
FIG. 9 is a perspective view of a prefabricated column steel component of the connection of FIG. 3;
FIG. 10 is an external view of the column body of FIG. 9 in a pre-fabricated column shipping state;
fig. 11 is a schematic view of the connection structure of fig. 1 coaxially connected between the shaft bodies.
Detailed Description
The technical scheme provided by the invention is explained in detail in the following with the accompanying drawings.
As shown in fig. 1 to 5, the present invention provides a prefabricated steel reinforced concrete column, including: a plurality of parallel extending upright posts 100, each upright post 100 comprising a plurality of coaxially extending post bodies 1 and connecting structures 2; two adjacent shaft 1 are connected coaxially through a connection structure 2, a column base 3 is connected to the bottom end of each upright column 100, and the column base 3 is adapted to the inside of a cup foundation 4.
The shaft 1 is shaped steel concrete column, adopts little expanded concrete, and the inside of shaft 1 is shaped steel structure, and the outside is reinforced concrete structure. The prefabricated column of the column body 1 is manufactured in a factory in advance, the column base 3 is inserted into the cup foundation 4, the column body 1, the connecting structure 2 and the column base 3 are longitudinally spliced, concrete is poured, and finally the prefabricated section steel concrete column is assembled. The prefabricated steel reinforced concrete columns are divided into three types, namely bottom layer columns, middle layer columns and top layer columns; the bottom layer column comprises a column base 3 positioned at the bottom, a column body 1 positioned in the middle and a connecting structure 2 positioned at the top; the middle-layer column comprises a column body 1 positioned in the middle and connecting structures 2 positioned at the upper end and the lower end of the column body 1; the top layer column comprises a column body 1 at the top and a connecting structure 2 at the bottom.
As shown in fig. 2, each column body 1 includes two steel plates 7, two first angle steels 8, section steels 9, a second angle steel 10, and a reinforcement cage 60, and the reinforcement cage 60 includes a longitudinal bar 6, a stirrup 11, and a first concrete 61. Specifically, each column body 1 comprises axially extending section steel 9, two steel plates 7 which are respectively arranged at two ends of the section steel 9 and extend transversely, two first angle steels 8 arranged at the peripheral edges of the opposite sides of the two steel plates 7, second angle steels 10 which extend outwards and are fixedly arranged from four corners of the two steel plates 7, and a reinforcement cage 60 which coaxially extends to the periphery of the section steel 9; the reinforcement cage 60 comprises a plurality of longitudinal bars 6 which extend axially and penetrate through the steel plate 7 and are fixedly connected with the first angle steel 8, and a plurality of hooping 11 which are surrounded and sleeved outside the longitudinal bars 6; the section steel 9 is a structural member formed by two I-shaped steels in a crossed and staggered manner.
In the embodiment, the first angle steel 8, the second angle steel 10 and the section steel 9 are all welded with the steel plate 7; two adjacent column bodies 1 are also welded through first angle steel 8; two adjacent column bodies 1 are also welded through section steel 9; two adjacent column bodies 1 are also welded through second angle steel 10; the longitudinal rib 6 of each column body 1 is fillet welded with the first angle iron 8 of the column body 1.
Specifically, two steel plates 7 are respectively arranged at the end parts of two ends of a column body 1, a first angle steel 8 is arranged above the steel plate 7 positioned at the upper end of the column body 1, a first angle steel 8 is arranged below the steel plate 7 positioned at the lower end of the column body 1, and the first angle steel 8 is welded and fixed with the steel plate 7; all be equipped with on two steel sheets 7 and supply to indulge the round hole (not numbered) that muscle 6 passed, the arbitrary steel sheet 7 that the column casing 1 was passed through corresponding round hole to indulge muscle 6 of column casing 1 and welded fastening on corresponding first angle steel 8, the welded fastening mode is the fillet weld welding. Four second angle steels 10 are prewelded at four corners of a steel plate 7 at the upper end of any column body 1, four second angle steels 10 are prewelded at four corners of the steel plate 7 at the lower end of the column body 1, the second angle steels 10 are L-shaped structural members extending longitudinally, and the second angle steels 10 are used for bearing construction loads during splicing between two adjacent column bodies 1 and participating in structural stress after splicing.
As shown in fig. 3 and 4, each connecting structure 2 includes a plurality of pressing sleeves 12, and the longitudinal ribs 6 of two adjacent columns 1 are coaxially connected through one pressing sleeve 12. When the adjacent column bodies 1 of each column 100 are axially spliced through the connecting structure 2, all the stirrups 11 are sleeved in the periphery of the lower end of the longitudinal rib 6 of one column body 1; then each extrusion sleeve 12 is sleeved between one of the longitudinal ribs 6 of the upper column body and one of the longitudinal ribs 6 of the lower column body; then, fixedly connecting a first angle steel 8 of the column body 1 positioned at the upper part and a first angle steel 8 of the column body 1 positioned at the lower part by welding; then, the section steel 9 of the upper column body 1 and the section steel 9 of the lower column body 1 are spliced by adopting a welding mode, and alternatively, the first angle steel 8 and the section steel 9 can be connected by adopting a high-strength bolt; the extrusion sleeve 12 is adjusted to the position connected with the upper and lower longitudinal ribs 6 to extrude the upper and lower longitudinal ribs 6, and the longitudinal ribs 6 can be connected by the axial extrusion of the extrusion sleeve 12; the stirrup 11 is adjusted to the mounting position for binding with the longitudinal bar 6. And finishing splicing the steel members.
As shown in fig. 5, a baffle 13 surrounding the longitudinal rib 6 is arranged on the periphery of each connecting structure 2, two side edges of the baffle 13 are hermetically attached to the first angle steel 8 of the column body 1 below the connecting structure 2, the bottom edge of the baffle 13 is hermetically attached to the steel plate 7 of the column body 1, the sealing and attaching manners are waterproof glue sealing connection, and the upper end of the baffle 13 is not sealed; the lower end of the baffle 13 is provided with a feed inlet 14 penetrating through the baffle 13 for injecting high-strength gypsum mortar under pressure to fill the cavity in the connecting structure 2, so that the internal steel member is protected; the upper end of the baffle 13 is provided with an exhaust hole 15 penetrating through the baffle 13, and the exhaust hole 15 is reserved for exhausting air during pressurized perfusion; the outer surface of the periphery of the baffle 13 is provided with reinforcing angle steel 16 in an attaching manner, opposite sides of the baffle 13 are respectively provided with opposite pull screws 17 penetrating through the reinforcing angle steel 16, specifically, two groups of opposite pull screws 17 are arranged at the upper end of the baffle 13 and are arranged in parallel with the side surface of the column body 1, the other two groups of opposite pull screws 17 are arranged at the lower end of the baffle 13 and are arranged in parallel with the side surface of the column body 1, the extending direction of the two groups of opposite pull screws 17 is vertical to the extending direction of the two groups of opposite pull screws 17, the reinforcing angle steel 16 is tensioned by the opposite pull screws 17 to drive the reinforcing angle steel 16 to tightly press the baffle 13, and the reinforcing angle steel 16 can be tensioned by the opposite pull screws 17; continuously pressurizing and pouring until mortar seeps out from the gap at the top of the baffle 13, and stopping pouring; and after the mortar is solidified, plastering and leveling the whole column body so as to facilitate later-period decoration.
As shown in fig. 6 and 7, each column shoe 3 includes a base plate 18 extending laterally, a plurality of first pegs 19, a reinforcing steel sleeve 20, a plurality of second pegs 21, a plurality of reinforcing ribs 22, a plurality of threaded sleeves 23, an anchor bolt 24, a plurality of nuts 25, mortar 26, and second concrete 27; the bottom plate 18 is transversely arranged in the cup rim foundation 4, the section steel 9 in the column body 1 at the bottom end of each upright column 100 extends downwards and is fixedly welded on the upper surface of the bottom plate 18, and the first studs 19 are fixedly welded on the outer surface of the section steel 9; each longitudinal rib 6 extending from the bottom end of each upright post 100 is fixedly connected to the upper surface of the bottom plate 18 through a threaded sleeve 23; the reinforced steel sleeve 20 is fixedly welded on the bottom plate 18 and extends upwards, the reinforced steel sleeve 20 is a rectangular steel pipe with the same peripheral size as the column body 1, the bearing capacity of the reinforced column base 3 and the effect of protecting concrete embedded in the column base are achieved, the height of the reinforced steel sleeve 20 is used as the depth of the column base 3 embedded in the cup opening foundation 4, the thickness of the reinforced steel sleeve 20 is the minimum width-thickness ratio value of the concrete-filled steel pipe column, and a plurality of second studs 21 are fixedly connected between the outer surface of the reinforced steel sleeve 20 and the cup opening foundation 4; the stiffening ribs 22 are fixedly welded on the reinforced steel sleeve 20 and the bottom plate 18 to improve the rigidity of the column base; each longitudinal rib 6 is welded on the bottom plate 18 in advance through a threaded sleeve 23; when fixing a position installation to column base 3, column base 3 is fixed in rim of a cup basis 4 through crab-bolt 24, crab-bolt 24 partly pre-buried in rim of a cup basis 4 and expose enough length in order to run through bottom plate 18, specifically for the crab-bolt 24 lower extreme is buried underground in rim of a cup basis 4 and crab-bolt 24 upper end passes bottom plate 18 and threaded connection nut 25 from bottom to top, screw in nut 25 and be used for temporarily fixing crab-bolt 24 and bottom plate 18 in crab-bolt 24 upper end, and then adjust the horizontality of bottom plate 18 through adjusting nut 25, adjust the straightness that hangs down of column base 3 through adjusting nut 25, utilize the theodolite to carry out the leveling to bottom plate 18.
And then pouring post-pouring mortar 26 under the bottom plate 18, pouring second concrete 27 between the outside of the reinforced steel sleeve 20 and the cup-mouth foundation 4 after the mortar 26 is initially set until the cup mouth of the cup-mouth foundation 4 is filled, wherein the second concrete 27 is provided with a protective layer, and the second concrete 27 is higher than the top of the reinforced steel sleeve 20 and forms a height difference as the thickness of the protective layer. After the second concrete 27 is completely solidified, a rigid connection column base can be formed, and then the upper structure, namely the column body 1 and the connecting structure 2, is assembled. The mortar 26 is used to fill a gap in the area between the underside of the base plate 18 and the upper side of the cup foundation 4, the mortar 26 having a micro-expansive characteristic, otherwise the underside of the base plate 18 is uneven and has a hollow, and the mortar 26 forms a rigid connection with the cup foundation 4 after hardening.
The manufacturing method of the precast concrete column comprises the following steps:
(1) the construction process comprises the following steps:
(11) and manufacturing the column body 1 in a factory:
binding the longitudinal bars 6 with stirrups 11 in the column body 1 to form a reinforcement cage 60, and welding a steel plate 7 of the column body 1 with section steel 9 in the column body 1, wherein a first angle steel 8 and a second angle steel 10 are welded on the steel plate 7; the reinforcement cage 60 is sleeved on the section steel 9, and the longitudinal bar 6 penetrates through the steel plate 7 and then is welded with the first angle steel 8, as shown in fig. 9. The first concrete 61 of the shaft 1 is poured in the factory to form a factory-packed prefabricated column, as shown in fig. 10.
(12) And column base 3 is installed:
firstly, a cup foundation 4 is reserved on an upper top plate of a pouring foundation, the pouring foundation is a raft or box type foundation and the like, the edge of the cup foundation 4 is 150mm to 250mm larger than a bottom plate 18, and the cup foundation 4 provides an operation space for installing a column base 3.
The column base 3 is inserted into the cup mouth foundation 4, after the anchor bolt 24 is preliminarily fastened, the sag of the column base 3 is adjusted through the adjusting nut 25, and after the column base is checked to be qualified through the theodolite or the total station, the anchor bolt 24 is screwed through the nut 25. Pouring post-pouring mortar 26 at the bottom of the column foot 3, pouring second concrete 27 in the cup-mouth foundation 4 after the mortar 26 is initially set until the cup-mouth foundation 4 is filled, namely the cup-mouth height of the cup-mouth foundation 4 is higher than the top of the reinforced steel sleeve 20 by one protective layer thickness. And after the second concrete 27 is completely solidified, the rigid connection column base 3 can be formed. And then assembling the column 100.
(13) And a plurality of column bodies 1 are spliced through a connecting structure 2:
firstly, sleeving all stirrups 11 on longitudinal reinforcements 6 of a lower column body 1, and completely stacking the stirrups 11 on the lower column body 1; then the extrusion sleeve 12 is sleeved on the longitudinal rib 6 of the lower column body 1; then, two adjacent column bodies 1 are coaxially welded through first angle steel 8, wherein in the splicing process, the first angle steel 8 bears all splicing construction loads, and in the construction load calculation, any larger value of the maximum side length 1/30 and the maximum side length 20mm of the cross section of each column body 1 is selected as an accessory eccentricity; then, two adjacent column bodies 1 are coaxially welded through section steel 9, and the opening area of the cross section of each column body 1 is not larger than 30% of the cross section; adjusting the extrusion sleeve 12 to a connecting position, extruding and connecting the longitudinal ribs 6 positioned at the upper and lower positions, and adjusting the stirrups 11 to mounting positions for uniformly binding the longitudinal ribs 6; and finishing the splicing of the steel members.
Then, as shown in fig. 5, the baffle 13 is installed around the connecting structure 2, two side edges of the baffle 13 are hermetically attached to the first angle steel 8 of the column body 1 below the connecting structure 2, the bottom edge of the baffle 13 is hermetically attached to the first steel plate 7 of the column body 1, the sealing and attaching manners are waterproof glue sealing connection, the waterproof glue is glass glue or silica gel, etc., the lower end and the side edge of the baffle 13 are sealed, and the upper end of the baffle 13 is not sealed; the lower end of the baffle 13 is provided with a feed inlet 14 penetrating through the baffle 13 for injecting high-strength gypsum mortar under pressure to fill the cavity in the connecting structure 2, so that the internal steel members are protected; the upper end of the baffle 13 is provided with an exhaust hole 15 penetrating through the baffle 13, and the exhaust hole 15 is reserved for exhausting air during pressurized perfusion; the outer surface of the periphery of the baffle 13 is provided with reinforcing angle steel 16 in an attaching mode, two ends of the baffle 13 are respectively provided with opposite pull screw rods 17 penetrating through the reinforcing angle steel 16, specifically, two groups of opposite pull screw rods 17 are arranged at the upper end of the baffle 13 and are arranged in parallel with the side surface of the column body 1, the other two groups of opposite pull screw rods 17 are arranged at the lower end of the baffle 13 and are arranged in parallel with the side surface of the column body 1, the extending direction of the two groups of opposite pull screw rods 17 is vertical to the extending direction of the two groups of opposite pull screw rods 17, the reinforcing angle steel 16 is tensioned by the opposite pull screw rods 17 so as to drive the reinforcing angle steel 16 to tightly press the baffle 13, and the reinforcing angle steel 16 can be tensioned by the opposite pull screw rods 17; continuously pressurizing and pouring until mortar seeps out from the gap at the top of the baffle 13, and stopping pouring; and after the mortar is solidified, plastering and leveling the whole column body so as to facilitate later-period decoration. As shown in fig. 11, the section bearing capacity of all steel members in step (13) is the same as that of the complete steel reinforced concrete column body 1.
(2) And (3) force calculation:
(21) stress of column shoe 3:
the minimum value calculation formula of the embedding depth of the column base 3 is as follows:
wherein h isBThe embedding depth of the column base, M is the calculated value of the maximum combined bending moment of the column base, fcThe designed value of the compressive strength of the post-cast second concrete 27 in the cup rim foundation 4 is shown, and b is the width of the reinforced steel sleeve 20;
(22) stress of the connection structure 2:
(221) in the construction process:
as shown in fig. 8, in the construction process, all construction disturbances are borne by the four first angle steels 8, and the bearing capacity calculation formula is as follows:
wherein N is1For construction of axial loads, Mx1Is N1Product of the additional eccentricity in the x-direction, My1Is N1Additional eccentricity in y-axis directionProduct of (a), V1F is the design value of tensile strength or compressive strength of steel for construction shear loadvThe design value of the shear strength of the steel is obtained; a. theLn Is 1 first angle iron 8 cross-sectional area, WnLxSection modulus, W, of a composite section of angle steel rotating around the x-axisnLySection modulus, h, of a combined section composed of angle steels rotating around the y-axisLIs the centroid distance of the angle steel along the y direction, bLThe centroid distances of the angle steel along the x direction are respectively; can be approximately calculated as:
WnLx＝2ALnhL；
WnLy＝2ALnbL；
(222) after molding:
WnLxf+WSpxf≥[Mx]；
WnLyf+WSpyf≥[My]；
wherein, WSpxAll-plastic section modulus, W, for rotation of section steel 9 about the x-axisSpyIs the overall plastic section modulus, [ M ] of the section steel 9 rotating around the y-axisx]Is the bending resistance bearing capacity of the column body (1) section rotating around the x axis [ My]The longitudinal bars 6 play a role in improving ductility and erecting the stirrups 11 for the bending resistance bearing capacity of the section of the column body (1) rotating around the y axis.
The invention also provides a combined structure, which comprises the prefabricated steel reinforced concrete column, and further comprises: a plurality of layers of parallel extending steel beams 5 arranged above the cup rim base 4, and a plurality of parallel extending columns 100 axially penetrate the steel beams 5.
This prefabricated shaped steel concrete column and integrated configuration, through many shaft 1 vertically splices in proper order, utilize the stand 100 of many parallel extensions, every stand 100 includes shaft 1 of many coaxial extensions, connection structure 2, through a connection structure 2 coaxial coupling between two adjacent shafts 1, a column base 3 is connected to the shaft 1 of stand 100 bottom, 3 adaptations of column base are in a cup foundation 4, realize the dry-type connection of the full assembly ization of prefabricated shaped steel concrete column, can solve and adopt the cast-in-place to lead to the problem that the efficiency of construction is low and with high costs, save man-hour.
Claims (10)
1. The utility model provides a prefabricated shaped steel concrete column which characterized in that includes: a plurality of parallel extending upright posts (100), each upright post comprising a plurality of coaxially extending post bodies (1) and a connecting structure (2); two adjacent column bodies are coaxially connected through a connecting structure; the bottom end of each upright post is connected with a pedestal (3), the pedestal is adapted to the inside of a cup foundation (4), and a plurality of upright posts extend upwards from the pedestal;
each column body comprises axially extending section steel (9), two transversely extending steel plates (7) respectively arranged at two ends of the section steel, two first angle steels (8) arranged at the peripheral edges of the opposite side surfaces of the two steel plates, and a reinforcement cage (60) coaxially extending to the periphery of the section steel; the reinforcement cage comprises a plurality of longitudinal bars (6) which axially extend, penetrate through the steel plate and are fixedly connected with the first angle steel;
each connecting structure comprises a plurality of extrusion sleeves (12), a baffle (13) surrounding the longitudinal ribs, reinforcing angle steel (16) attached to the peripheral outer surface of the baffle, and a split screw (17) connected to the reinforcing angle steel on the opposite side; the longitudinal ribs of two adjacent column bodies are coaxially connected through an extrusion sleeve, and the opposite-pulling screw rods are used for driving the reinforcing angle steel to tightly press the baffle;
each column foot comprises a base plate (18) extending transversely, a reinforcing steel sleeve (20) fixedly connected to the base plate and extending upwards, an anchor bolt (24) penetrating through the base plate from bottom to top and connected with the base plate through threads, mortar (26) fixedly arranged below the base plate and second concrete (27) arranged between the outside of the reinforcing steel sleeve and the cup opening foundation; the section steel of the upright post extends downwards and is fixedly arranged on the upper surface of the bottom plate.
2. The prefabricated steel reinforced concrete column of claim 1, wherein the column body further comprises: second angle steel (10) fixedly extending outwards from four corners of the two steel plates; two adjacent column bodies of each upright column are coaxially connected through second angle steel.
3. The prefabricated steel reinforced concrete column of claim 2, wherein each column shoe further comprises: a plurality of first pegs (19) fixedly connected to the outer surface of the section steel; a plurality of second studs (21) fixedly connected between the outer surface of the reinforced steel sleeve and the cup rim base; and a stiffening rib (22) fixedly arranged on the reinforced steel sleeve and the bottom plate.
4. The prefabricated steel reinforced concrete column as claimed in claim 3, wherein the section steel is a structural member formed by two I-shaped steels in a crisscross manner; the first angle steel, the second angle steel and the connection mode of the section steel and the steel plate are all welded; two adjacent column bodies are welded through first angle steel; two adjacent column bodies are welded through section steel; the longitudinal bar of each column body is welded with the first angle steel of the column body through an angle welding seam; the reinforced steel sleeve and the section steel are welded on the upper surface of the bottom plate; the stiffening ribs are welded with the reinforcing steel sleeve and the bottom plate; the upper end of the anchor bolt penetrates through the bottom plate and is in threaded connection with a nut (25) for fastening the bottom plate.
5. The prefabricated steel reinforced concrete column as claimed in claim 1, wherein the lower end of the baffle plate is provided with a feed inlet (14) penetrating through the baffle plate, and the upper end of the baffle plate is provided with an exhaust hole (15) penetrating through the baffle plate.
6. The prefabricated steel reinforced concrete column as claimed in claim 1, wherein each reinforcement cage further comprises a first concrete (61), a plurality of hoops (11) surrounding and sleeved on the longitudinal bars.
7. The prefabricated steel reinforced concrete column as recited in claim 1, wherein a cross-section of the reinforcing steel jacket is equal in size to a cross-section of the column body.
8. The prefabricated steel reinforced concrete column as claimed in claim 1, wherein each longitudinal bar extending from the bottom end of each upright is fixedly connected to the upper surface of the bottom plate through a threaded sleeve (23).
9. The prefabricated steel reinforced concrete column as recited in claim 1, wherein the second concrete has a protective layer, the second concrete being higher than the reinforcing steel jacket with a height difference as a thickness of the protective layer.
10. A composite structure comprising the prefabricated steel reinforced concrete column as recited in any one of claims 1 to 9, further comprising: locate multilayer parallel extension's of rim of a cup basis top girder steel (5), many parallel extension's stand passes the girder steel along the axial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111650582.4A CN114250912B (en) | 2021-12-30 | 2021-12-30 | Prefabricated section steel concrete column and composite structure |
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Cited By (1)
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| CN115354755A (en) * | 2022-08-10 | 2022-11-18 | 广州电力设计院有限公司 | Connecting structure and connecting method of foundation and upright post |
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| CN114250912B (en) | 2023-03-21 |
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