CN111155680A - All-bolt connection multilayer prefabricated section steel concrete shear wall structure and preparation and construction method thereof - Google Patents
All-bolt connection multilayer prefabricated section steel concrete shear wall structure and preparation and construction method thereof Download PDFInfo
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- CN111155680A CN111155680A CN201911395062.6A CN201911395062A CN111155680A CN 111155680 A CN111155680 A CN 111155680A CN 201911395062 A CN201911395062 A CN 201911395062A CN 111155680 A CN111155680 A CN 111155680A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 192
- 239000010959 steel Substances 0.000 title claims abstract description 192
- 239000004567 concrete Substances 0.000 title claims abstract description 71
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims description 7
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 27
- 230000002093 peripheral effect Effects 0.000 claims abstract description 25
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011178 precast concrete Substances 0.000 abstract description 8
- 238000009417 prefabrication Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 6
- 238000004321 preservation Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4114—Elements with sockets
- E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/38—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels
- E04C2/384—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels with a metal frame
Abstract
The invention discloses an all-bolt connection multilayer prefabricated section steel concrete shear wall structure, wherein the distance between the end surface of the upper end or the lower end of the multilayer prefabricated section steel concrete shear wall structure and the nearest end surface of a cross beam is 1/4-1/3 floor height; t-shaped beam supports are arranged at two ends of the cross beam, and bolt holes are formed in the connecting steel plates; the multilayer prefabricated section steel concrete shear wall structure further comprises an L-shaped connecting piece, and a bolt hole is formed in the L-shaped connecting piece; the width of the upper flange of the cross beam is larger than the thickness of the precast concrete; and a steel bar connecting hole is formed in the upper end surface of the upper flange, close to the outer side. The multi-layer prefabricated section steel concrete shear wall structure has high degree of factory prefabrication and less field wet operation. The assembled steel reinforced concrete shear walls and the peripheral steel beams are connected in a full-bolt mode, and the site construction speed is high. The earthquake-proof performance is good, the earthquake-proof structure is suitable for areas with high earthquake intensity, and the applicable height of the structure is large.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to an all-bolt connection multilayer prefabricated section steel concrete shear wall structure and a preparation and construction method thereof.
Background
The assembly type building is a transformation and upgrade direction in the building industry and is a new sunrise industry which is vigorously popularized in the current country. The residential building is the key point of the development of the assembly type building, then a proper residential building structural system is not available at present, the steel bar grouting sleeve shear wall is questioned by the industry due to the reasons of high factory production requirement, low efficiency, high construction requirement, frequent connection quality problem, high cost and the like, and the vertical components are even forbidden to adopt prefabricated components in part of areas.
The residential building has the functional characteristics of complex functions, high use requirement (such as no exposed beam columns), high safety requirement, high energy-saving, heat-insulating, sound-proof and fire-proof requirements, high maintenance difficulty in the service life and the like. Meanwhile, the residential building has the market characteristics of large quantity, wide range, huge construction amount, sensitive cost, and the market is composed of commodity houses dominated by developers and guarantee houses dominated by governments. The functional characteristics and market characteristics of residential buildings determine that the residential structure system is difficult to develop, and the requirements of strict cost control, high use functional requirements, no exposure of steel components (including beams, columns, supports and node plates), good heat preservation, sound insulation and seismic resistance and the like need to be met.
The lack of a residential structure system with perfect industrialization characteristics in the industry under the condition of domestic market environment and industrial development is a core technical problem in the assembly type building industry.
Disclosure of Invention
The invention aims to provide a multilayer prefabricated section steel concrete shear wall structure which is novel and unique in structure, convenient to use, and capable of effectively avoiding the problems of more on-site wet operations, low construction efficiency, high cost, higher construction difficulty of a steel bar grouting sleeve connection on site, difficulty in quality guarantee, high cost and the like; the specific technical scheme is as follows:
a full-bolt connection multilayer prefabricated section steel concrete shear wall structure comprises a steel bar structure and prefabricated concrete; the steel bar structure comprises horizontally distributed vertical steel bars and longitudinally distributed horizontal steel bars; the height of the multilayer prefabricated section steel concrete shear wall structure is higher than that of one layer; the steel bar structure also comprises a plurality of cross beams and a plurality of upright posts; the cross beam and the upright post are both made of section steel; reinforcing steel bar holes are formed in the positions, close to the outer side flanges, of the upright post webs, the left end portions and the right end portions of the horizontal reinforcing steel bars penetrate through the reinforcing steel bar holes formed in the upright post webs after being bent respectively, combined connection is formed after concrete is poured, and internal force of the horizontally distributed reinforcing steel bars is transmitted; the precast concrete is arranged between the flanges at the outer sides of the two stand columns; the reinforcing steel bar structure continuously passes through the pouring reserved section between each layer of precast concrete; the distance between the end surface of the upper end or the lower end of the multilayer prefabricated section steel concrete shear wall structure and the nearest end surface of the cross beam is 1/4-1/3 floor height; t-shaped beam supports are arranged at two ends of the cross beam, and bolt holes are formed in the connecting steel plates; the multilayer prefabricated section steel concrete shear wall structure further comprises an L-shaped connecting piece, and a bolt hole is formed in the L-shaped connecting piece; the width of the upper flange of the cross beam is larger than the thickness of the precast concrete; and a steel bar connecting hole is formed in the upper end surface of the upper flange, close to the outer side.
Further, the reinforced concrete is poured into a ribbed reinforced concrete structure.
Further, the height of the connecting steel plate seat is 150 mm-300 mm.
Further, the width of the inner side flange of the upright is 20-30 mm smaller than that of the outer side flange, and the thickness of the precast concrete is the same as that of the outer side flange of the upright.
The invention also provides a preparation method of the multilayer prefabricated section steel concrete shear wall structure, which comprises the following steps:
1) in a factory, welding a beam and an upright post made of section steel into a steel frame, wherein the beam at the end part of the steel frame is arranged at a position between 1/4 and 1/3 floor heights away from the end surface of the upright post, and the end parts of the two ends of the upright post are welded with connecting steel plate seats; a bolt mounting hole is formed in the outer side flange plate of the connecting steel plate seat; and reinforcing steel bar holes are formed at the positions, close to the outer side flanges, of the upright column webs.
2) Placing the steel frame on a mould table; fixing horizontal steel bars and vertical steel bars on the steel frame; bending two ends of a horizontal steel bar respectively and then penetrating through steel bar holes formed in a web plate of the stand column, bending two ends of a vertical steel bar and then penetrating through steel bar holes formed in a central rib plate of an end cross beam of each layer of the steel frame and a rib plate of the connecting steel plate seat respectively, or welding the two ends of the vertical steel bar on the rib plate of the end cross beam and the rib plate of the connecting steel plate seat respectively;
3) pouring concrete between the two upright columns, and vibrating while pouring;
4) and curing the concrete after pouring.
Further, the method also comprises the following steps:
and step 1) welding stiffening ribs between the column flanges in the beam column joint area.
Further, the step 1) further comprises the steps of welding beam T-shaped beam supports and connecting steel plates at two ends of the beam, and processing the L-shaped connecting piece.
The invention also discloses a construction method of the multilayer prefabricated section steel concrete shear wall structure, which comprises the following steps:
1) installing a next-layer multilayer prefabricated section steel concrete shear wall structure; fixing by using temporary supports, respectively connecting T-shaped beam supports and connecting plates at two ends of a cross beam of the multi-layer prefabricated steel reinforced concrete shear wall structure with lower flanges and web plates of peripheral steel beams, and arranging an L-shaped connecting piece to be connected with upper flanges of the peripheral steel beams;
2) installing each horizontal floor in the next multi-layer prefabricated steel reinforced concrete shear wall structure, and sequentially arranging the reinforcing steel bars of each horizontal floor;
3) pouring superposed layer concrete of each floor slab;
4) connecting the connecting steel plate bases between the upper and lower layers of the multi-layer prefabricated steel reinforced concrete shear wall structures through high-strength bolts;
5) pouring a reserved section at the joint, wherein horizontally distributed reinforcing steel bars of a floor slab are arranged in the reserved section at the joint;
6) installing each horizontal prefabricated floor slab in the upper multi-layer prefabricated steel reinforced concrete shear wall structure, and arranging horizontal floor slab reinforcing steel bars;
7) pouring concrete to fill the floor slab;
and (5) repeating the steps 1) to 7) until all the layers of the multilayer prefabricated section steel concrete shear wall structures are installed.
Furthermore, the cross beam and the L-shaped connecting piece are connected with the peripheral steel beams through high-strength bolts.
The invention uses the built-in steel frame as the bearing framework during construction, realizes that a plurality of structural layer heights are used as a prefabricated unit, greatly reduces the number of connecting joints and can greatly improve the construction efficiency. The steel reinforced concrete shear wall structure has good anti-seismic performance, is suitable for high-intensity areas, and has large applicable height.
Drawings
FIG. 1 is a schematic structural diagram of a multi-layer prefabricated steel reinforced concrete shear wall structure according to the present invention;
FIG. 2 is a schematic view of the internal structure of the multi-layer prefabricated steel reinforced concrete shear wall structure of the present invention;
fig. 3 is an assembly schematic diagram of a multi-layer prefabricated steel reinforced concrete shear wall structure.
In the figure: 1. a steel beam; 2. a steel upright post; 3. horizontal reinforcing steel bars; 4. vertical reinforcing steel bars; 5. connecting a steel plate seat; 6. A T-shaped beam support; 7. concrete; 8. a connecting plate; 9. an L-shaped connecting plate; 10. t-shaped connecting bottom corners; 11. a peripheral steel beam; A. an upper shear wall structure; B. lower floor's shear wall structure.
Detailed Description
The present invention will now be more fully described with reference to the following examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.
For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial 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 described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, the multi-layer prefabricated steel reinforced concrete shear wall structure in the embodiment includes concrete 7 and a steel bar structure. When in pouring, the concrete 7 of the whole shear wall is not poured into a whole; but is cast in sections. A pouring reserved section can be arranged at the position of the concrete 7 corresponding to the floor slab; the pouring reservation section may not be provided. The steel bars of the floor slab or only the upper layer of steel bars extend into and are anchored in the pouring reserved sections among the precast concretes of all layers, and the steel bars are poured together with the floor slab and the precast steel reinforced concrete shear wall on site, so that the structural strength and the integrity of the building are improved. When the pouring reserved section is not arranged, the width of the upper flange of the cross beam is larger than the thickness of the precast concrete; a steel bar connecting hole (not shown in the figure) is formed in the upper end face of the upper flange, close to the outer side; the end connecting steel bar of the transverse steel bar of the floor slab can pass through the steel bar connecting hole; and performing binding positioning or welding positioning.
The upper end surfaces of the beam 1 and the upright post 2 are not at the same height; the beam 1 is about 1.3 meters lower than the upper end surface of the upright post 2 and is controlled between 1/4 and 1/3 floor height. The two ends of the upright post 2 are welded and connected with steel plate seats 5; and a bolt mounting hole is formed in the bottom of the connecting steel plate seat 5. The joints of the shear walls and the cross beams are staggered and arranged at the positions with smaller stress, so that the anti-seismic performance of the building is improved.
The concrete 7 does not cover the outer flange plates of the two columns 2, and the outer flange plates of the two columns 2 are used as frames. In the drawing, the shear wall is of a multi-ribbed structure, and autoclaved aerated concrete blocks are filled among the multi-ribbed structure so as to reduce the weight and facilitate on-site hoisting; meanwhile, the heat preservation and insulation performance of the structure can be improved, the consumption of concrete can be reduced, the cost can be reduced, and the energy consumption function of the structure as a second defense line during earthquake can be realized.
The width of the inner side flange of the upright post is 20-30 mm smaller than that of the outer side flange, so that the horizontal steel bars 3 are conveniently distributed.
As shown in fig. 2, the reinforcing bar structure includes horizontally distributed vertical reinforcing bars 4 and longitudinally distributed horizontal reinforcing bars 3. In order to improve the strength, rigidity and ductility of the shear wall structure and facilitate connection, the steel bar structure also comprises a steel frame consisting of a plurality of layers of steel beams 1 and a plurality of steel upright columns 2; the steel frame can be arranged according to floors. The steel bar structure continuously passes through the pouring reserved section between each layer of precast concrete, so that the number of the connecting joints is reduced, and the construction process is simplified. The vertical reinforcing steel bars 4 penetrating through the upper portion and the lower portion can improve the strength and the integrity of the multi-layer prefabricated steel reinforced concrete shear wall structure. Connecting structures are arranged in the pouring reserved sections at the upper end and the lower end of the multilayer prefabricated steel reinforced concrete shear wall structure; a plurality of shear wall structures can be conveniently connected in series up and down through the connecting structure, and the connecting structure is suitable for multi-storey or high-rise buildings.
The multilayer prefabricated section steel concrete shear wall structure can adopt a straight shape, a T shape, an L shape or a cross shape and the like; an inclined support can be arranged between the layer steel beam 1 and the steel upright post 2; the strength of the steel frame is improved.
The bottom of the connecting steel plate seat 5 is a steel plate seat, and the thickness is not less than 10 mm; a plurality of bolt mounting holes are formed in the steel plate seat. The central stiffening rib is vertically welded along the length direction, and a plurality of auxiliary stiffening ribs vertical to the central stiffening rib are arranged along the length direction of the central stiffening rib. The position of the auxiliary stiffening rib corresponds to the arrangement position of the vertical reinforcing steel bar 4; make vertical reinforcing bar 4 can paste and weld on the steel sheet side of supplementary stiffening rib, transmit vertical reinforcing bar 4's power to connecting steel sheet seat.
The T-shaped beam supports 6 are welded on the upright posts 2 and used for supporting the peripheral cross beams during hoisting. The top plate of the T-shaped beam support 6 is provided with a bolt hole, and the beam support 6 is fixedly connected with the lower flange of the peripheral cross beam through a bolt.
An L-shaped connecting plate 9 can be further arranged, bolt holes are formed in the bottom plate and the side plates of the L-shaped connecting plate 9, and the L-shaped connecting plate 9 is fixedly connected with the upright posts 2 and the upper flanges of the peripheral cross beams through bolts. Stiffening ribs can be arranged between the bottom plate and the side plates of the L-shaped connecting plate 9, so that the connecting strength is improved.
And a connecting plate 8 can be welded on the upright post 2 between the upper flange and the lower flange of the peripheral beam, and the connecting plate 8 is fixedly connected with the web plate of the peripheral beam by using bolts.
The web height of the cross beam 1 is as consistent as possible with the web height of the peripheral cross beam. Stiffening ribs are welded between the left flange and the right flange of the upright column and at the corresponding positions of the upper flange plate and the lower flange plate of the cross beam 1; the support strength of the column 2 is improved.
In order to be connected with each floor slab conveniently and improve the structural integrity, the height of the pouring reserved section is not more than the thickness of the floor slab.
In order to improve the connection strength of the upper-layer shear wall structure A and the lower-layer shear wall structure B; the height of the connecting steel plate seat is 150 mm-300 mm.
The multilayer prefabricated section steel concrete shear wall structure is prepared by the following method:
1) in a factory, welding a beam 1 made of section steel and a steel upright post 2 into a steel frame, and welding the beam 1 at a distance of 1/4-1/3 floor height from the upper end surface of the steel upright post 2; both ends of the upright post 2 are welded with steel plate seats; the two ends of the beam 1 correspond to the positions, and a T-shaped beam support 6 and a connecting plate 8 are welded on the side surface of the upright post 2; if necessary, stiffening ribs can be welded between the column flanges in the beam column joint area;
2) pouring a concrete outer blade plate (not shown in the figure), arranging a heat-preservation connecting piece (not shown in the figure) on the concrete outer blade plate, and maintaining;
3) after the concrete outer leaf plate is cured, the concrete outer leaf plate is placed on a mould table, an insulating layer (not shown in the figure) is placed on the outer leaf plate, and an insulating connecting piece penetrates through the insulating layer; if the heat-insulating layer is not needed or the heat-insulating layer and the outer blade plate are not needed, the step 2) and the step 3) can be omitted);
4) placing the steel frame on a mould table; fixing a horizontal steel bar 3 and a vertical steel bar 4 on the steel frame; bending two end parts of a horizontal steel bar 3 respectively to pass through steel bar holes formed in webs of two stand columns 2, bending the upper end part of a vertical steel bar 4 to pass through the steel bar hole formed in a central rib plate of an end cross beam, and bending the lower end part of the vertical steel bar 4 to pass through the steel bar hole formed in a rib plate of a connecting steel plate base 5;
5) pouring concrete between the two upright posts 2 by taking the two inner side flange plates as side molds, and placing aerated concrete blocks when a rib structure is adopted; vibrating while pouring; a process groove for mounting the bolt or the nut is arranged at a position corresponding to the bolt mounting hole of the end cross beam, so that the bolt or the nut is conveniently mounted;
6) and curing the concrete after pouring. And a pouring reserved section is reserved in the middle of the concrete 7 formed by pouring and is used for in-situ pouring. The prefabricated concrete blocks 7 surround the steel frame in sections.
As shown in fig. 3, after the multi-layer prefabricated steel reinforced concrete shear wall structure is transported to the site, the multi-layer prefabricated steel reinforced concrete shear wall structure is installed by the following method:
1) installing a lower-layer shear wall structure B; the method comprises the following steps of (1) fixing by using temporary supports, respectively connecting T-shaped beam supports 6 and connecting plates 8 at two ends of a steel beam 1 of a multilayer prefabricated section steel concrete shear wall structure with a lower flange and a web of a peripheral steel beam 11, and arranging an L-shaped connecting piece 9 to be connected with an upper flange of the peripheral steel beam 11;
2) installing each horizontal floor in a multi-layer prefabricated section steel concrete shear wall structure, and sequentially arranging reinforcing steel bars of each horizontal floor;
3) pouring laminated concrete of each floor slab of the lower shear wall structure B and pouring a reserved section;
4) connecting a connecting steel plate seat 5 at the lower end of the upper-layer shear wall structure A with a connecting steel plate seat 5 at the upper end of the lower-layer shear wall structure B by using high-strength bolts, and connecting the cross beam with a peripheral steel beam 11;
5) pouring a reserved section at the joint, wherein horizontally distributed reinforcing steel bars of a floor slab are arranged in the reserved section at the joint;
6) installing a horizontal prefabricated floor slab of the upper-layer shear wall structure A, and sequentially arranging horizontal floor slab reinforcing steel bars;
7) pouring concrete to fill the floor slab;
finishing the installation of the upper-layer shear wall structure A and the lower-layer shear wall structure B; and (5) repeating the steps 1) to 7) until all the layers of shear wall structures are installed.
Compared with the prior art, the prefabricated reinforced concrete shear wall structure only takes one structural layer height as a prefabricated unit, so that the number of connecting joints is large, and the construction efficiency is not high; the invention uses the built-in steel frame as the bearing framework during construction, realizes that a plurality of structural layer heights are used as a prefabricated unit, greatly reduces the number of connecting joints and can greatly improve the construction efficiency. The peripheral steel frame columns adopt hot-rolled H-shaped steel, so that the steel frame columns are conveniently connected with the steel beams through full bolts; the thickness of the peripheral steel frame column is the same as that of the shear wall, the out-of-plane bending resistance bearing capacity of the shear wall is higher, and the connection with the steel beam is more convenient. The web plate and the inner side flange of the peripheral steel frame upright post and the inner side of the outer side flange are coated in the concrete, so that the area of the anticorrosion fireproof coating is greatly reduced, and the expense of the anticorrosion coating is saved. The outer side of the outer side flange of the peripheral steel frame upright post is exposed outside the concrete, so that the outer side flange is conveniently connected with the peripheral steel beam. The vertical connection of the prefabricated reinforced concrete shear wall structure usually adopts a steel bar lapping or grouting sleeve connection mode, and the connection mode has higher requirement on the processing precision of prefabricated parts and difficult field construction; the sleeve grouting is a concealed project, the grouting quality is difficult to guarantee, and the cost of the steel bar connecting sleeve is high. The invention comprises the following steps: 1) the upper prefabricated shear wall is used for connecting the steel plate seat with the lower prefabricated shear wall peripheral steel frame through the high-strength bolts, so that the problem of vertical steel bar connection is solved; 2) the prefabricated shear wall is connected with the steel beam through the high-strength bolt. Because the steel structure has high processing precision, the connection mode of the invention can ensure the on-site construction quality; meanwhile, the connection mode has no hidden engineering, and the quality is easy to guarantee. According to the invention, the horizontally distributed reinforcing steel bars and the vertically distributed reinforcing steel bars of the shear wall, and the reinforcing steel bars between the upper prefabricated shear wall and the lower prefabricated shear wall are connected with the built-in steel frame or the connecting reinforcing steel bar seat through the perforated steel plate, and the PBL shear connector is formed after concrete is poured, so that force transmission is realized, welding is avoided, factory processing is greatly facilitated, welding procedures are saved, quality is easy to guarantee, and the defect that welding connection quality is difficult to control is avoided. The peripheral steel frame can play a role in bearing the framework during installation, connecting pieces connected with the upper layer of installation units and the peripheral steel beams 11, can restrain concrete, and can bear load together with the reinforced concrete part, so that the structural bearing capacity is higher, the seismic performance is better, and the steel frame is suitable for high seismic intensity areas.
The invention relates to an all-bolt connection multilayer prefabricated section steel concrete shear wall structure and a preparation and construction method thereof, wherein the preparation and construction method comprises the following steps:
(1) the prefabrication degree of a factory is high, and the field wet operation is less. The multilayer prefabricated steel reinforced concrete shear wall structure is integrally prefabricated in a factory by taking a plurality of structural layer heights as an installation unit, the number of joints is reduced by 2/3, and the field work efficiency is greatly improved.
(2) The prefabricated shear wall has no ribs at the end part, is convenient for industrial production and has high production efficiency.
(3) And the construction efficiency is obviously improved in the assembly construction. The multilayer prefabricated section steel concrete shear wall structure, the steel beam and the upper layer of multilayer prefabricated section steel concrete shear wall structure are connected in a full-bolt mode, the site operation speed is high, and the construction efficiency can be improved by 3 times.
(4) Good corrosion and fire resistance and low cost. Most of the steel structure part in the multilayer prefabricated steel reinforced concrete shear wall structure is coated in concrete, so that the corrosion and fire resistance is good, and the corrosion and fire prevention cost is greatly reduced.
(5) The structure, the enclosure, the heat preservation and the decoration are integrated. The multi-layer prefabricated section steel concrete shear wall structure has the functions of bearing the structure and enclosing the building, meanwhile, the heat insulation layer can be compounded with the multi-layer prefabricated section steel concrete shear wall structure in a factory, the outer surface of the outer leaf plate of the structure can realize the effects of fair-faced concrete and decorative concrete, the integration of structure, enclosing, heat insulation and decoration is realized, the cost is more saved, and the heat insulation performance is better.
(6) The multi-ribbed structure reduces the concrete consumption by more than 40%, saves concrete materials, reduces the cost, improves the heat preservation and heat insulation performance of the structure by the autoclaved aerated concrete blocks filled among the multi-ribbed structure, and can consume earthquake energy through the damage of the autoclaved aerated concrete blocks during earthquake resistance.
(7) The steel reinforced concrete shear wall has good anti-seismic performance, is suitable for high-intensity areas, and has large applicable height.
And the method has a plurality of advantages, can be applied to multi-story high-rise steel structure buildings, and particularly has better popularization and application prospects in steel structure houses.
The above examples are only for illustrating the present invention, and besides, there are many different embodiments, which can be conceived by those skilled in the art after understanding the idea of the present invention, and therefore, they are not listed here.
Claims (5)
1. A preparation method of an all-bolt connection multilayer prefabricated section steel concrete shear wall structure is characterized by comprising the following steps:
1) in a factory, welding a beam and an upright post made of section steel into a steel frame, wherein the beam at the end part of the steel frame is arranged at a position between 1/4 and 1/3 floor heights away from the end surface of the upright post, and the end parts of the two ends of the upright post are welded with connecting steel plate seats; a bolt mounting hole is formed in the outer side flange plate of the connecting steel plate seat;
2) placing the steel frame on a mould table; fixing horizontal steel bars and vertical steel bars on the steel frame; respectively welding two ends of a horizontal steel bar on outer side flange plates of the two stand columns, respectively bending two ends of the vertical steel bar, and then penetrating through a steel bar hole formed in a central rib plate of the end cross beam of each layer of the steel frame, or respectively welding the two ends of the vertical steel bar on a rib plate of the end cross beam and a rib plate of the connecting steel plate seat;
3) pouring concrete between the two upright columns, and vibrating while pouring;
4) and curing the concrete after pouring.
2. The method for preparing a multi-layered prefabricated section steel concrete shear wall structure according to claim 1, wherein the step 1) further comprises welding stiffening ribs between the column flanges at the node area of the beam column.
3. The method for manufacturing the multilayer prefabricated section steel concrete shear wall structure as claimed in claim 2, wherein the step 1) further comprises welding beam fixing seats and connecting steel plates at two ends of the beam, and processing L-shaped connecting pieces.
4. The construction method of the all-bolt connection multi-layer prefabricated section steel concrete shear wall structure according to any one of claims 1 to 3, characterized by comprising the following steps:
1) installing a next-layer multilayer prefabricated section steel concrete shear wall structure; fixing by using temporary supports, respectively connecting T-shaped beam supports and connecting plates at two ends of a cross beam of the multi-layer prefabricated steel reinforced concrete shear wall structure with a lower flange and a web of a peripheral steel beam, and arranging an L-shaped connecting piece to be connected with an upper flange of the peripheral steel beam;
2) installing each horizontal floor in the next multi-layer prefabricated steel reinforced concrete shear wall structure, and sequentially arranging the reinforcing steel bars of each horizontal floor;
3) pouring laminated concrete of each floor slab and pouring a reserved section;
4) connecting the connecting steel plate bases between the upper and lower layers of the multi-layer prefabricated steel reinforced concrete shear wall structures through high-strength bolts;
5) horizontally distributed steel bars are arranged in the pouring reserved section at the joint, and the pouring reserved section at the joint is poured;
6) installing each horizontal prefabricated floor slab in the upper multi-layer prefabricated steel reinforced concrete shear wall structure, and arranging horizontal floor slab reinforcing steel bars;
7) pouring concrete to fill the floor slab;
and (5) repeating the steps 1) to 7) until all the layers of the multilayer prefabricated section steel concrete shear wall structures are installed.
5. The construction method of the multi-layered prefabricated section steel concrete shear wall structure as claimed in claim 4, wherein the T-shaped beam supports, the connecting plates and the L-shaped connecting members at both ends of the cross beam are connected with the peripheral steel beams by high-strength bolts.
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