A multi-story cold-formed thin-walled steel building with earthquake toughness defense and a prefabrication and assembly method

Abstract

This invention discloses a multi-story cold-formed thin-walled steel building with earthquake toughness defense and a prefabrication and assembly method. The building includes steel-concrete composite walls, ordinary skin walls, and composite floor slabs. Ordinary skin walls are installed on both sides of the steel-concrete composite walls and are fixedly connected to the steel-concrete composite walls via skin wall-composite wall connectors. The composite floor slabs are fixedly connected to the steel-concrete composite walls and ordinary skin walls of each floor via steel-concrete composite wall connectors and floor-composite wall connectors, forming a multi-story cold-formed thin-walled steel building. The method includes prefabricating steel-concrete composite walls, composite walls, ordinary skin walls, and composite floor slabs, and selecting the above-mentioned prefabricated modules to complete the assembly between the modules according to the needs of on-site construction. This invention can significantly improve the earthquake toughness of multi-story cold-formed thin-walled steel structures, and all components can be prefabricated in a factory, resulting in high construction efficiency.

Description

Technical Field

[0001] This invention relates to building structure technology, and in particular to a multi-story cold-formed thin-walled steel building with earthquake toughness defense and a prefabrication and assembly method. Background Technology

[0002] Cold-formed thin-walled steel structures are a type of lightweight steel keel composite shear wall structure system that uses cold-formed thin-walled steel basic components and structural plates as the main structural components. For many years, cold-formed thin-walled steel structures have been widely used due to their advantages such as light weight, environmentally friendly and recyclable materials, high degree of prefabrication, and short construction period.

[0003] The main load-bearing and lateral-resistance components of cold-formed thin-walled steel structures are composite walls, whose lateral-resistance primarily stems from the skin effect of the facing panels. However, due to the low load-bearing capacity of the composite wall's studs and the fact that most facing panels are brittle materials with poor energy dissipation, the skin effect of the composite wall is easily weakened or even completely lost under seismic loads due to column buckling, wall panel cracking, and failure of the panel-stud screw connections. This results in damage patterns that are difficult to repair or extremely costly to repair. Clearly, traditional cold-formed thin-walled steel structures, with their insufficient energy dissipation and large damaged areas, lack the ability to quickly recover their functionality after an earthquake. There is an urgent need to develop cold-formed thin-walled steel structure systems that go beyond simply meeting the seismic requirements of "major earthquake safety" to achieving "low-carbon toughness" and recoverable functionality. Summary of the Invention

[0004] Purpose of the invention: The present invention aims to provide a multi-story cold-formed thin-walled steel building with earthquake toughness defense; another purpose of the present invention is to provide a prefabrication and assembly method for a multi-story cold-formed thin-walled steel building with earthquake toughness defense.

[0005] Technical solution: The present invention provides a multi-story cold-formed thin-walled steel building with earthquake toughness defense, comprising a steel tube concrete bundle-composite wall, a common skin wall, and a composite floor slab; the common skin wall is disposed on both sides of the steel tube concrete bundle-composite wall and is fixedly connected to the steel tube concrete bundle-composite wall through skin wall-composite wall connectors; the composite floor slab is fixedly connected to the steel tube concrete bundle-composite wall and the common skin wall of each floor through steel tube concrete bundle connectors and floor slab-composite wall connectors, forming a multi-story cold-formed thin-walled steel building;

[0006] The steel-concrete composite wall comprises a composite wall body and steel-concrete composite bundles arranged on both sides of the composite wall body. The composite wall body is fixedly connected to the steel-concrete composite bundles through a first column-wall energy dissipation component and a second column-wall energy dissipation component. The steel-concrete composite bundles are formed by splicing multiple cold-formed thin-walled steel components to form irregular columns and then filling them with fine aggregate concrete. Each bundle includes a central column and auxiliary columns located on both sides of the central column. The auxiliary columns are shorter than the central column, with their tops flush with the central column and their bottoms shorter than the central column. Reinforcing steel plates are provided on the outer side of the bottom of the auxiliary columns, and bearing steel plates are pre-embedded within the auxiliary columns. The composite wall includes a grid-like wall frame, lightweight concrete blocks, and high-strength concrete. The wall structure consists of high-strength concrete, an FRP reinforcement layer, and a second cladding panel. The grid-like wall frame includes cold-formed thin-walled steel horizontal joists, vertical joists, and horizontal braces. Multiple vertical and horizontal joists are arranged in a grid pattern, with the vertical joists fixedly connected to the horizontal joists at their upper and lower ends. Lightweight concrete blocks are embedded within the grid-like frame, with a space reserved around the perimeter for post-grouting. High-strength concrete is located within the post-grouting space, and the FRP reinforcement layer is adhered to the outside of the high-strength concrete. The second cladding panel is fixedly installed on both sides of the grid-like frame.

[0007] Optionally, the steel-concrete composite tube bundle connector includes a first connector, a second connector, and a third connector. All three connectors are integral steel components welded from steel plates. The first connector is located at the center of adjacent steel-concrete composite tube bundles and is used to connect the upper and lower center columns, forming a continuous component. The second connectors are arranged in pairs on both sides of the first connector and are fixedly connected to it. Simultaneously, the second connector is embedded within the composite floor slab, located directly above the lower auxiliary column, and is fixedly connected to both the composite floor slab and the top of the lower auxiliary column. The third connector is located at the bottom of the upper auxiliary column and is fixedly connected to it via a reset disc spring and an auxiliary column energy-dissipating component. The third connector is also fixedly connected to the second connector.

[0008] The floor-to-composite wall connector is a cold-formed thin-walled angle steel located at the top and bottom of the composite wall, used to connect the composite wall and the composite floor.

[0009] Optionally, the auxiliary column energy-consuming component includes a first corrugated steel plate, a second corrugated steel plate, and a pad. The first corrugated steel plate and the pad are fixedly connected to the side wall of the auxiliary column, and the second corrugated steel plate is fixedly connected to the side plate of the third connector.

[0010] Optionally, the skin wall-composite wall connector is a double-section cold-formed thin-walled I-beam, located between the steel tube concrete bundle-composite wall and the ordinary skin wall, and is fixedly connected to both the steel tube concrete bundle-composite wall and the ordinary skin wall to form a weak connection between the steel tube concrete bundle-composite wall and the ordinary skin wall.

[0011] Optionally, the first column-wall energy dissipation component is located at the top of the steel-concrete composite bundle and the composite wall, and is composed of angle steel, friction plates and T-shaped steel plates. The angle steel and T-shaped steel plates are fixedly connected to the auxiliary column and the composite wall. The friction plates are arranged in pairs on both sides of the web of the T-shaped steel plates and are connected to the angle steel and T-shaped steel plates to form friction energy dissipation connectors. The second column-wall energy dissipation component is a U-shaped steel plate, which is located between the steel-concrete composite bundle and the composite wall. The flange of the U-shaped steel plate is fixedly connected to the steel-concrete composite bundle and the composite wall.

[0012] Optionally, the ordinary skin wall includes an ordinary skin wall frame, a cladding panel, and infill material; the ordinary skin wall frame is formed by connecting several C-shaped cold-formed thin-walled steel columns and cold-formed thin-walled steel-wood composite guide rails arranged at equal intervals; the cladding panel is fixed to the outside of the ordinary skin wall frame; and the infill material is located in the cavity formed by the ordinary skin wall frame and the cladding panel; the cold-formed thin-walled steel-wood composite guide rail is provided with reserved bolt holes for the connection between the ordinary skin wall and the composite floor slab.

[0013] Optionally, the composite floor slab includes a composite floor slab frame, cold-formed thin-walled steel-wood composite beams, structural slabs, a concrete layer, and a decorative surface layer. The composite floor slab frame is formed by connecting cold-formed thin-walled steel support beams, cold-formed thin-walled steel support beam guide rails, and floor cross braces. The cold-formed thin-walled steel-wood composite beams are composed of cold-formed thin-walled steel components and wooden beams. The cold-formed thin-walled steel-wood composite beams are located above and below the cold-formed thin-walled steel support beam guide rails and are fixedly connected. The structural slab is divided into a first structural slab and a second structural slab. The first structural slab and the second structural slab are respectively fixed above and below the composite floor slab frame. The concrete layer is located directly above the first structural slab, and the decorative surface layer is located directly above the concrete layer.

[0014] Based on the same inventive concept, the present invention provides a prefabrication and assembly method for a multi-story cold-formed thin-walled steel building with earthquake toughness defense, comprising the following steps:

[0015] First, prefabricate the steel-concrete composite bundles, composite walls, ordinary skin walls, and composite floor slabs according to the requirements.

[0016] Then, the prefabricated components are installed on the construction site. The installation process is as follows:

[0017] Installation of the first-floor steel-concrete composite wall and ordinary skin wall: After installing the steel-concrete composite wall at the designed position, fix the steel-concrete composite wall to the foundation using the first connector, the third connector, the reset disc spring, and the auxiliary column energy dissipation component; install the composite wall between adjacent steel-concrete composite walls and fix it to the foundation using the column-wall energy dissipation component; after fixing the cold-formed thin-walled steel-wood composite beam to the foundation at the target installation position of the ordinary skin wall, install the ordinary skin wall directly above the cold-formed thin-walled steel-wood composite beam, so that the bottom guide rail of the ordinary skin wall is engaged with the cold-formed thin-walled steel-wood composite beam and fixedly connected; fix the ordinary skin wall and the steel-concrete composite wall using double-jointed cold-formed thin-walled I-beams to complete the installation of the first-floor steel-concrete composite wall and ordinary skin wall;

[0018] Installation of the composite floor slab: Install the first connector in the center of the steel-concrete composite bundle and fix it to the top of the central column; after installing the composite floor slab directly above the steel-concrete composite wall and the ordinary skin wall, snap the cold-formed thin-walled steel-wood composite top guide rail of the ordinary skin wall with the cold-formed thin-walled steel-wood composite beam and fix it; above each auxiliary column, arrange the second connectors in pairs inside the cold-formed thin-walled steel floor slab support beam guide rail and fix them to the web of the cold-formed thin-walled steel floor slab support beam guide rail, and fix the second connectors to the first connectors and the top of the auxiliary columns; install the cold-formed thin-walled angle steel on the top of the composite wall and fix the top of the composite wall and the composite floor slab to complete the installation of the composite floor slab;

[0019] Installation of the second layer of steel-concrete composite wall and ordinary skin wall: After installing the second layer of steel-concrete composite wall directly above the first layer of steel-concrete composite wall, fix the bottom of each central column of the second layer to the top of the first layer central column with the first connector; after installing the third connector directly below each auxiliary column of the second layer, fix the top plate of the second connector directly above the first layer auxiliary column, the composite floor slab, and the bottom plate of the third connector directly below the second layer auxiliary column, and seal the reserved space for subsequent installation in the composite floor slab; after fixing the bottom of the second layer auxiliary column to the top plate of the third connector directly below it with a reset disc spring, fix the first corrugated steel plate and pad to the side wall of the second layer auxiliary column, and fix the second corrugated steel plate to the side plate of the third connector; install the second layer composite wall and ordinary skin wall in the same way as the first layer of steel-concrete composite wall and ordinary skin wall, and complete the installation of the second layer of steel-concrete composite wall and ordinary skin wall;

[0020] Install the remaining layers of steel-concrete composite walls, ordinary skin walls, and composite floor slabs following the steps described above to complete the installation of the overall structure.

[0021] Furthermore, precast steel-concrete composite structures, composite walls, ordinary skin walls, and composite floor slabs specifically include:

[0022] Multiple cold-formed thin-walled steel components are spliced ​​together to form an irregular column with a flat top and a central column that is longer than the auxiliary columns on both sides. Then, a reinforcing steel plate is installed at the bottom of the irregular column, and the pre-embedded bolts and bearing steel plates are installed in the cavity of the irregular column according to the design requirements. Finally, fine stone concrete is poured into the irregular column to complete the prefabrication of the steel tube concrete bundle.

[0023] After inserting several cold-formed thin-walled steel vertical keels at equal intervals into the bottom cold-formed thin-walled steel horizontal keels of the grid-like wall frame and fixing them in place, install the first row of lightweight concrete filler blocks, reserving space for post-grouting; slot the cold-formed thin-walled steel horizontal braces at the designed positions, and pass the cold-formed thin-walled steel vertical keels through the cold-formed thin-walled steel horizontal braces, so that the first row of lightweight concrete filler blocks is embedded in the cold-formed thin-walled steel horizontal braces; install the remaining rows of lightweight concrete filler blocks and cold-formed thin-walled steel horizontal braces in sequence, reserving space for post-grouting, and then install the top cold-formed thin-walled steel horizontal keels of the grid-like wall frame; pour high-strength concrete into the post-grouting space, and attach an FRP reinforcement layer to the outside of the high-strength concrete; install the second covering panels on both sides of the grid-like wall frame to complete the prefabrication of the composite wall;

[0024] Wooden beams are pasted onto the designed positions of the cold-formed thin-walled steel components to form a cold-formed thin-walled steel-wood composite guide rail; then, C-shaped cold-formed thin-walled steel columns are inserted at equal intervals into the cold-formed thin-walled steel-wood composite guide rail and fixedly connected to form a common skin wall frame; cover panels are installed on both sides of the common skin wall frame, and filling material is embedded into the common skin wall frame to complete the prefabrication of the common skin wall;

[0025] After the cold-formed thin-walled steel support beams, cold-formed thin-walled steel support beam guide rails, and floor cross braces are fixedly connected to form the composite floor slab framework, the cold-formed thin-walled steel-wood composite beams are fixedly connected to the upper and lower flanges of the cold-formed thin-walled steel support beam guide rails; the first structural slab and the second structural slab are fixedly connected to the composite floor slab framework, and after reserving space for subsequent installation on the composite floor slab, concrete is poured on top of the first structural slab and a decorative surface layer is installed to complete the prefabrication of the composite floor slab.

[0026] Furthermore, the fixed connections between the structural components include pre-embedded bolts or bolt-fixed connections.

[0027] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0028] (1) Based on the concept of steel tube concrete bundle and composite wall synergistic lateral resistance, this invention sets a variety of easily replaceable energy-consuming components at the bottom of the steel tube concrete bundle and at the connection between the steel tube concrete bundle and the composite wall to improve the energy consumption capacity of cold-formed thin-walled steel structure under seismic action, which can avoid large-area damage that is difficult to repair caused by the nonlinear deformation energy consumption of the composite wall through the plate-keel screw connector.

[0029] (2) The grid-like wall frame and lightweight concrete filler used in the composite wall in this invention can avoid large-area damage to the board-keel screw connection caused by the incoordination of the wall frame and the panel deformation. In addition, the high-strength concrete reinforcement zone around the wall can avoid pressure damage to vulnerable parts such as the corners of the wall, and can achieve low damage or even no damage to the composite wall. Furthermore, the steel tube concrete bundles on both sides of the composite wall not only enhance the vertical bearing capacity and stability of the wall, but the disc springs at the bottom of the bundles also give the steel tube concrete bundles the characteristics of reset and swing, so that the steel tube concrete bundle-composite wall has a dual lateral resistance mechanism of swing and shear, which can effectively control the development of earthquake damage in cold-formed thin-walled steel structures and improve the seismic toughness of the structure.

[0030] (3) The ordinary skin wall in this invention has the functions of vertical load bearing and space division. The ordinary skin wall adopts cold-formed thin-walled steel-wood composite guide rail, and the ordinary skin wall and the steel tube concrete bundle-composite wall adopt a weak connection. This approach can make the load bearing function division and force transmission mechanism between the ordinary skin wall and the steel tube concrete bundle-composite wall clearer. In addition, when installing the ordinary skin wall and the composite floor, it is only necessary to snap the cold-formed thin-walled steel-wood composite guide rail to the cold-formed thin-walled steel-wood composite beam of the composite floor. The connection between the ordinary skin wall and the composite floor can be completed from the side of the wall. There is no need to reserve additional post-installation space, which solves the problems of difficulty in aligning bolt holes between components and complicated installation procedures, and greatly simplifies the prefabrication and installation procedures of the ordinary skin wall and the composite floor.

[0031] (4) Each component of the present invention can be prefabricated in the factory, and on-site assembly only requires sealing the reserved installation space of the combined floor slab, which greatly improves construction efficiency. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of a multi-story cold-formed thin-walled steel building with earthquake toughness defense in this invention;

[0033] Figure 2 This is a schematic diagram of the structure of the steel-concrete composite tube in this invention;

[0034] Figure 3 This is a schematic diagram of the structure of the composite wall in this invention;

[0035] Figure 4 This is a schematic diagram of the structure of a conventional skin wall in this invention;

[0036] Figure 5 This is a schematic diagram of the structure of the combined floor slab in this invention;

[0037] Figure 6This is a schematic diagram of the connector structure in this invention; wherein (a) is a schematic diagram of the steel tube concrete bundle connector structure; and (b) is a schematic diagram of the skin wall-composite wall connector structure.

[0038] Figure 7 This is a schematic diagram of the structure of the energy-consuming component in this invention; wherein, (a) is a schematic diagram of the auxiliary column energy-consuming component; (b) is a schematic diagram of the first column-wall energy-consuming component; and (c) is a schematic diagram of the second column-wall energy-consuming component.

[0039] Figure 8 This is a schematic diagram showing the connection between the steel-concrete composite wall, the ordinary skin wall, and the composite floor slab in this invention;

[0040] Figure 9 This is a cross-sectional view of the connection between the cold-formed thin-walled steel-wood composite beam, the composite floor support beam guide rail, and the ordinary skin walls of the upper and lower layers in this invention.

[0041] Figure 10 This is a detailed diagram showing the connection between the first-layer steel-concrete composite wall, the ordinary skin wall, and the foundation in this invention;

[0042] In the diagram: 1. Steel-concrete composite wall; 11. Steel-concrete composite bundle; 111. Cold-formed thin-walled steel component; 112. Fine aggregate concrete; 113. Central column; 114. Auxiliary column; 115. Reinforcing steel plate; 116. Bearing steel plate; 12. Composite wall; 121. Grid wall frame; 121. Cold-formed thin-walled steel horizontal joists; 1212. Cold-formed thin-walled steel vertical joists; 1213. Cold-formed thin-walled steel horizontal braces; 1214. Post-grouting space; 122. Lightweight concrete filler block; 123. High-strength concrete; 124. FRP reinforcement layer; 125. Second cover panel; 13. Reset disc spring; 14. Energy dissipation component; 141. Auxiliary column energy dissipation component; 141. First corrugated steel plate; 1411. Second corrugated steel plate; 1412. Pad; 1413. Column-wall energy dissipation component; 142. First column-wall energy dissipation component; 1421. Angle steel; 1421a. Friction. Plate 1421b, T-shaped steel plate 1421c, second column-wall energy-consuming component 1422, ordinary skin wall 2, ordinary skin wall frame 21, C-shaped cold-formed thin-walled steel column 211, cold-formed thin-walled steel-wood composite guide rail 212, covering panel 22, filling material 23, composite floor slab 3, composite floor slab frame 31, cold-formed thin-walled steel support beam 311, cold-formed thin-walled steel support beam guide rail 312, floor cross brace 313, cold-formed thin-walled steel-wood composite beam 32, structural plate 33, first structural plate 331, second structural plate 332, concrete layer 34, decorative surface layer 35, connector 4, steel pipe concrete bundle connector 41, first connector 411, second connector 412, third connector 413, wall connector 42, skin wall-composite wall connector 421, floor-composite wall connector 422. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0044] like Figure 1 , 4 As shown in Figures 6 and 8, a multi-story cold-formed thin-walled steel building with earthquake toughness defense according to the present invention includes a steel tube concrete bundle-composite wall 1, a common skin wall 2, a composite floor slab 3, and connectors 4. The common skin wall 2 is located on both sides of the steel tube concrete bundle-composite wall 1 and is fixedly connected to the steel tube concrete bundle-composite wall 1 through connectors 4. The composite floor slab 3 is fixedly connected to each layer of the steel tube concrete bundle-composite wall 1 and the common skin wall 2 through connectors 4. The steel tube concrete bundle-composite wall 1 includes a steel tube concrete bundle 11, a composite wall body 12, a reset disc spring 13, and an energy dissipation component 14. The common skin wall 2 includes a common skin wall frame 21, a covering panel 22, and a filling material 23. The composite floor slab 3 includes a composite floor slab frame 31, a cold-formed thin-walled steel-wood composite beam 32, a structural slab 33, a concrete layer 34, and a decorative surface layer 35. The connectors 4 include a steel tube concrete bundle connector 41 and a wall connector 42.

[0045] like Figure 2 As shown, the steel-concrete composite tube bundle 11 is formed by splicing multiple cold-formed thin-walled steel components 111 to form an irregular column, which is then filled with fine aggregate concrete 112. It includes a central column 113 and auxiliary columns 114 located on both sides of the central column 113, with the auxiliary columns 114 being shorter than the central column 113. Pre-embedded bolts are installed inside the steel-concrete composite tube bundle 11, and the bottom end of the bundle 11 is encased in a reinforcing steel plate 115, which is fixedly connected to the pre-embedded bolts. Furthermore, a bearing steel plate 116 is pre-embedded inside the auxiliary columns 114 and fixedly connected to the pre-embedded bolts. The cross-sectional forms of the cold-formed thin-walled steel components include, but are not limited to, C-shaped, U-shaped, Z-shaped, bow-shaped, and straight-line shapes.

[0046] like Figure 3 As shown, the composite wall 12 includes a grid-like wall frame 121, lightweight concrete filler blocks 122, high-strength concrete 123, FRP reinforcing layer 124, second covering panel 125, and embedded bolts. The grid-like wall frame 121 includes cold-formed thin-walled steel horizontal joists 1211, cold-formed thin-walled steel vertical joists 1212, and cold-formed thin-walled steel horizontal braces 1213. The lightweight concrete filler blocks 122 are embedded inside the grid-like wall frame 121, and a post-grouting space 1214 is reserved around the perimeter of the composite wall 12. The high-strength concrete 123 is located in the post-grouting space 1214, and the FRP reinforcing layer 124 is adhered to the outside of the high-strength concrete 123. The second covering panel 125 is located on both sides of the grid-like wall frame 121 and is fixedly connected to the grid-like wall frame 121 by self-tapping screws.

[0047] like Figure 4As shown, the ordinary skin wall 2 includes an ordinary skin wall frame 21, a cladding panel 22, and infill material 23. The ordinary skin wall frame 21 is formed by connecting several C-shaped cold-formed thin-walled steel columns 211 and cold-formed thin-walled steel-wood composite guide rails 212 arranged at equal intervals with self-tapping screws. The cladding panel 22 is fixed to the outside of the ordinary skin wall frame 21 with self-tapping screws. The infill material 23 is located in the cavity formed by the ordinary skin wall frame 21 and the cladding panel 22. The cold-formed thin-walled steel-wood composite guide rails 212 are provided with reserved bolt holes for the connection between the ordinary skin wall 2 and the composite floor slab 3.

[0048] like Figure 5 , 8 As shown, the composite floor slab 3 includes a composite floor slab frame 31, cold-formed thin-walled steel-wood composite beams 32, structural slabs 33, a concrete layer 34, and a decorative surface layer 35. The composite floor slab frame 31 is formed by connecting cold-formed thin-walled steel support beams 311, cold-formed thin-walled steel support beam guide rails 312, and floor cross braces 313 with self-tapping screws. The cold-formed thin-walled steel-wood composite beams 32 are formed by bonding cold-formed thin-walled steel components 111 and wooden beams with structural adhesive. The cold-formed thin-walled steel-wood composite beams 32 are located above and below the cold-formed thin-walled steel support beam guide rails 312 and are fixedly connected by bolts. The structural slab 33 is divided into a first structural slab 331 and a second structural slab 332. The first structural slab 331 and the second structural slab 332 are fixed above and below the composite floor slab frame 31 with self-tapping screws, respectively. The concrete layer 34 is located directly above the first structural slab 331, and the decorative surface layer 35 is located directly above the concrete layer 34.

[0049] like Figure 6 , 8As shown, the connector 4 includes a steel tube concrete bundle connector 41 and a wall connector 42. The steel tube concrete bundle connector 41 includes a first connector 411, a second connector 412, and a third connector 413. The first connector 411, the second connector 412, and the third connector 413 are all steel components welded from steel plates. The first connector 411 is located in the center of the adjacent layer of steel tube concrete bundle 11 and is used to connect the upper and lower layer center columns 113 to form a continuous component. The second connectors 412 are arranged in pairs on both sides of the first connector 411 and are fixedly connected to the first connector 411 by bolts. At the same time, the second connector 412 is embedded in the cold-formed thin-walled steel support beam guide rail 312 and is located directly above the auxiliary column 114 after being fixedly connected to the cold-formed thin-walled steel support beam guide rail 312 by bolts. The second connector 412 is fixedly connected to the pre-embedded bolts at the top of the auxiliary column 114. The third connector 413 is located at the bottom of the auxiliary column 114 and is fixedly connected to the auxiliary column 114 by a reset disc spring 13 and an energy-dissipating component 14. The third connector 413 is fixedly connected to the second connector 412 by bolts. The wall connector 42 includes a skin wall-composite wall connector 421 and a floor-composite wall connector 422 with a weak zone set in the web. The skin wall-composite wall connector 421 is a double-section cold-formed thin-walled I-beam, and the floor-composite wall connector 422 is a cold-formed thin-walled angle steel. The double-section cold-formed thin-walled I-beam is located between the steel tube concrete bundle-composite wall 1 and the ordinary skin wall 2, and is connected to the steel tube concrete bundle-composite wall 1 and the ordinary skin wall 2 by bolts and self-tapping screws, respectively, to form a weak connection between the steel tube concrete bundle-composite wall 1 and the ordinary skin wall 2. The cold-formed thin-walled angle steel is located at the top of the composite wall 12 and is used to connect the composite wall 12 and the composite floor 3.

[0050] like Figure 7 , 8As shown, the energy-consuming component 14 includes an auxiliary column energy-consuming component 141 and a column-wall energy-consuming component 142. The column-wall energy-consuming component 142 is further divided into a first column-wall energy-consuming component 1421 and a second column-wall energy-consuming component 1422. The auxiliary column energy-consuming component 141 includes a first corrugated steel plate 1411, a second corrugated steel plate 1412, and a pad 1413. The second corrugated steel plate 1412 has slotted holes, while the first corrugated steel plate 1411 and the pad 1413 have ordinary bolt holes. The first corrugated steel plate 1411 and the pad 1413 are fixedly connected to the side wall of the auxiliary column 114 by pre-embedded bolts. The second corrugated steel plate 1412 is fixedly connected to the side plate of the third connecting component 413 by bolts. The first column-wall energy-consuming component 1421 is located at... The top of the steel-concrete composite tube bundle 11 and the composite wall 12 is composed of angle steel 1421a, friction plate 1421b and T-shaped steel plate 1421c. The angle steel 1421a and T-shaped steel plate 1421c are fixedly connected to the auxiliary column 114 and the composite wall 12 by pre-embedded bolts. The friction plate 1421b is arranged in pairs on both sides of the web of the T-shaped steel plate 1421c and is bolted to the angle steel 1421a and T-shaped steel plate 1421c to form a friction energy dissipation connector. The second column-wall energy dissipation component 1422 is a U-shaped steel plate. The U-shaped steel plate is located between the steel-concrete composite tube bundle 11 and the composite wall 12. The flange of the U-shaped steel plate is fixedly connected to the steel-concrete composite tube bundle 11 and the composite wall 12 by pre-embedded bolts.

[0051] A prefabrication method for a multi-story cold-formed thin-walled steel house with earthquake toughness defense includes the following steps:

[0052] Step 1, Precast steel-concrete composite bundle 11: (e.g.) Figure 2 As shown, multiple cold-formed thin-walled steel components 111 are spliced ​​together to form an irregular column with a flush top and a central column 113 with a lower end longer than the auxiliary columns 114 on both sides. Then, a reinforcing steel plate 115 is installed at the bottom of the irregular column, and the pre-embedded bolts and bearing steel plate 116 are installed in the cavity of the irregular column according to the design requirements. Finally, fine stone concrete 112 is poured into the irregular column to complete the prefabrication of the steel tube concrete bundle 11.

[0053] Step 2, Precast composite wall 12: such as Figure 3As shown, firstly, several cold-formed thin-walled steel vertical keels 1212 are inserted at equal intervals into the bottom of the grid-like wall frame 121, and then the cold-formed thin-walled steel horizontal keels 1211 are fixedly connected with self-tapping screws. Then, the first row of lightweight concrete filler blocks 122 is installed, and a space 1214 for subsequent grouting is reserved. Secondly, grooves are cut into the cold-formed thin-walled steel horizontal supports 1213 at the designed positions, and the cold-formed thin-walled steel vertical keels 1212 are passed through the cold-formed thin-walled steel horizontal supports 1213, so that the first row of lightweight concrete filler blocks 122 are embedded within the cold-formed thin-walled steel horizontal supports 1213. Thirdly... After installing the remaining rows of lightweight concrete filler blocks 122 and cold-formed thin-walled steel cross braces 1213 in sequence and reserving a grouting space 1214, install the top cold-formed thin-walled steel cross braces 1211 of the grid-like wall frame 121; fifth, after installing the pre-embedded bolts in the design position, pour high-strength concrete 123 into the grouting space 1214, and attach an FRP reinforcing layer 124 to the outside of the high-strength concrete 123; sixth, use self-tapping screws to install the second cover panels 125 on both sides of the grid-like wall frame 121 to complete the prefabrication of the composite wall 12;

[0054] Step 3, Prefabricated ordinary skin wall 2: such as Figure 4 , 9 As shown, firstly, wooden beams are pasted onto the designed positions of cold-formed thin-walled steel components 111 to form a cold-formed thin-walled steel-wood composite guide rail 212; then, C-shaped cold-formed thin-walled steel columns 211 are inserted into the cold-formed thin-walled steel-wood composite guide rail 212 at equal intervals and fixedly connected with self-tapping screws to form a common skin wall frame 21; covering panels 22 are installed on both sides of the common skin wall frame 21 using self-tapping screws, and filling material 23 is embedded into the common skin wall frame 21 to complete the prefabrication of the common skin wall 2;

[0055] Step 4, Precast composite floor slab 3: as shown Figure 5 , 8 As shown in Figure 9, firstly, the cold-formed thin-walled steel support beam 311, the cold-formed thin-walled steel support beam guide rail 312, and the floor cross brace 313 are fixedly connected with self-tapping screws to form a composite floor slab frame 31. Then, the cold-formed thin-walled steel-wood composite beam 32 is fixedly connected to the upper and lower flanges of the cold-formed thin-walled steel support beam guide rail 312 with bolts. Then, the first structural plate 331 and the second structural plate 332 are fixedly connected to the composite floor slab frame 31 with self-tapping screws. After reserving space for subsequent installation in the composite floor slab 3, concrete 34 is poured above the first structural plate 331 and the decorative surface layer 35 is installed to complete the prefabrication of the composite floor slab 3.

[0056] The on-site installation of a multi-story cold-formed thin-walled steel house with earthquake toughness defense, based on the prefabricated steel-concrete composite bundles 11, composite walls 12, ordinary skin walls 2, and composite floor slabs 3 in the above steps, includes the following assembly methods:

[0057] Step 1: Install the first-floor steel-concrete composite wall 1 and ordinary skin wall 2: (e.g.) Figure 8-10 As shown, firstly, after the steel-concrete composite bundle 11 is installed at the designed position, it is fixedly connected to the foundation by pre-embedded bolts, first connector 411, third connector 413, reset disc spring 13, and auxiliary column energy dissipation component 141; secondly, the composite wall 12 is installed between adjacent steel-concrete composite bundles 11 and fixedly connected by column-wall energy dissipation component 142; thirdly, after the cold-formed thin-walled steel-wood composite beam 32 is fixedly connected to the foundation by pre-embedded bolts in the foundation at the target installation position of the ordinary skin wall 2, the ordinary skin wall 2 is installed directly above the cold-formed thin-walled steel-wood composite beam 32, so that the cold-formed thin-walled steel-wood composite bottom guide rail of the ordinary skin wall 2 is engaged with the cold-formed thin-walled steel-wood composite beam 32 and fixedly connected by bolts; fourthly, the ordinary skin wall 2 and the steel-concrete composite bundle 11 are fixedly connected by double-jointed cold-formed thin-walled I-beams, completing the installation of the first-floor steel-concrete composite bundle-composite wall 1 and ordinary skin wall 2;

[0058] Step 2, Install the combined floor slab 3: (e.g.) Figure 8-9 As shown, firstly, the first connector 411 is installed in the center of the steel-concrete composite bundle 11 and fixedly connected to the pre-embedded bolts at the top of the central column 113; secondly, after the composite floor slab 3 is installed directly above the steel-concrete composite bundle-composite wall 1 and the ordinary skin wall 2, the cold-formed thin-walled steel-wood composite top guide rail of the ordinary skin wall 2 is snapped into the cold-formed thin-walled steel-wood composite beam 32 and fixedly connected by bolts; thirdly, above each auxiliary column 114, the second connector 412 is arranged in pairs inside the cold-formed thin-walled steel support beam guide rail 312 and fixedly connected to the web of the cold-formed thin-walled steel support beam guide rail 312 by bolts, while the second connector 412 is fixedly connected to the first connector 411 and the top of the auxiliary column 114; fourthly, the cold-formed thin-walled angle steel is installed on the top of the composite wall 12 and fixedly connected to the top of the composite wall 12 and the composite floor slab 3 by self-tapping screws, thus completing the installation of the composite floor slab 3;

[0059] Step 3: Install the second layer of steel-concrete composite wall 1 and ordinary skin wall 2: (e.g.) Figure 8-9As shown, firstly, after installing the second-layer steel-concrete composite bundle 11 directly above the first-layer steel-concrete composite bundle 11, the bottom of each central column 113 of the second layer is fixedly connected to the first connecting piece 411 at the top of the central column 113 of the first layer; secondly, after installing the third connecting piece 413 directly below each auxiliary column 114 of the second layer, bolts are sequentially passed through the top plate of the second connecting piece 412 directly above the auxiliary column 114 of the first layer, the composite floor slab 3, and the bottom plate of the third connecting piece 413 directly below the auxiliary column 114 of the second layer and fixedly connected, and the reserved space of the composite floor slab 3 is then installed. The space is sealed off; third, after the bottom of the second-layer auxiliary column 114 is fixedly connected to the top plate of the third connector 413 directly below it through the reset disc spring 13, the first corrugated steel plate 1411 and the pad 1413 are fixedly connected to the side wall of the second-layer auxiliary column 114 through the pre-embedded bolts, and the second corrugated steel plate 1412 is fixedly connected to the side plate of the third connector 413 through bolts; fourth, the second-layer composite wall 12 and ordinary skin wall 2 are installed according to the method in step 5, and the installation of the second-layer steel pipe concrete bundle-composite wall 1 and ordinary skin wall 2 is completed;

[0060] Step 4: Install the remaining layers of steel pipe concrete bundle-composite wall 1, ordinary skin wall 2 and composite floor slab 3 according to the above steps to complete the installation of the overall structure.

Claims

1. A multi-story cold-formed thin-walled steel building with earthquake toughness defense, characterized in that, It includes a steel tube concrete bundle-composite wall (1), a common skin wall (2), and a composite floor slab (3); the common skin wall (2) is set on both sides of the steel tube concrete bundle-composite wall (1) and is fixedly connected to the steel tube concrete bundle-composite wall (1) through a skin wall-composite wall connector (421); the composite floor slab (3) is fixedly connected to the steel tube concrete bundle-composite wall (1) and the common skin wall (2) of each floor through a steel tube concrete bundle connector (41) and a floor slab-composite wall connector (422) to form a multi-story cold-formed thin-walled steel building; The steel-concrete composite wall (1) includes a composite wall (12) and steel-concrete composite bundles (11) arranged on both sides of the composite wall (12). The composite wall (12) is fixedly connected to the steel-concrete composite bundles (11) through a first column-wall energy dissipation component (1421) and a second column-wall energy dissipation component (1422). The steel-concrete composite bundles (11) are formed by splicing multiple cold-formed thin-walled steel components (111) to form an irregular column and then filling it with fine stone concrete (112). The central column (113) and auxiliary columns (114) located on both sides of the central column (113) are provided. The length of the auxiliary columns (114) is less than that of the central column (113), and the top of the auxiliary columns (114) is flush with the central column (113), while the bottom is shorter than that of the central column (113). A reinforcing steel plate (115) is provided on the outer side of the bottom of the auxiliary columns (114), and a pressure-bearing steel plate (116) is embedded in the auxiliary columns (114). The composite wall (12) includes a grid-like wall frame (121) and lightweight concrete filler blocks (114). 22) High-strength concrete (123), FRP reinforcement layer (124), and second cladding panel (125); wherein, the grid-like wall frame (121) includes cold-formed thin-walled steel horizontal keel (1211), cold-formed thin-walled steel vertical keel (1212), and cold-formed thin-walled steel horizontal brace (1213), and multiple cold-formed thin-walled steel vertical keels (1212) and multiple cold-formed thin-walled steel horizontal braces (1213) are arranged in a grid pattern, and multiple cold-formed thin-walled steel vertical keels (1211) are arranged in a grid pattern. 2) The upper and lower ends are fixedly connected to the cold-formed thin-walled steel horizontal keel (1211); the lightweight concrete filler block (122) is embedded in the mesh frame (121), and a post-grouting space (1214) is reserved around the composite wall (12); the high-strength concrete (123) is located in the post-grouting space (1214), and the FRP reinforcement layer (124) is pasted on the outside of the high-strength concrete (123); the second cover panel (125) is fixedly set on both sides of the mesh frame (121).

2. A multi-story cold-formed thin-walled steel building with earthquake toughness defense according to claim 1, characterized in that, The steel-concrete composite tube bundle connector (41) includes a first connector (411), a second connector (412), and a third connector (413). All three connectors are integral steel components welded from steel plates. The first connector (411) is located at the center of adjacent layers of steel-concrete composite tube bundles (11) and is used to connect the upper and lower layer center columns (113) to form a continuous component. The second connectors (412) are arranged in pairs on both sides of the first connector (411). The first connector (411) is fixedly connected to the second connector (412), which is embedded in the composite floor slab (3) and located directly above the lower auxiliary column (114). The second connector (412) is fixedly connected to both the composite floor slab (3) and the top of the lower auxiliary column (114). The third connector (413) is located at the bottom of the upper auxiliary column (114) and is fixedly connected to the upper auxiliary column (114) through a reset disc spring (13) and an auxiliary column energy dissipation component (141). The third connector (413) is fixedly connected to the second connector (412). The floor-composite wall connector (422) is a cold-formed thin-walled angle steel located at the top and bottom of the composite wall (12) and is used to connect the composite wall (12) and the composite floor (3).

3. A multi-story cold-formed thin-walled steel building with earthquake toughness defense according to claim 2, characterized in that, The auxiliary column energy-consuming component (141) includes a first corrugated steel plate (1411), a second corrugated steel plate (1412), and a pad (1413). The first corrugated steel plate (1411) and the pad (1413) are fixedly connected to the side wall of the auxiliary column (114), and the second corrugated steel plate (1412) is fixedly connected to the side plate of the third connector (413).

4. A multi-story cold-formed thin-walled steel building with earthquake toughness defense according to claim 1, characterized in that, The skin wall-composite wall connector (421) is a double-section cold-formed thin-walled I-beam (421), located between the steel tube concrete bundle-composite wall (1) and the ordinary skin wall (2), and is fixedly connected to the steel tube concrete bundle-composite wall (1) and the ordinary skin wall (2) to form a weak connection between the steel tube concrete bundle-composite wall (1) and the ordinary skin wall (2).

5. A multi-story cold-formed thin-walled steel building with earthquake toughness defense according to claim 1, characterized in that, The first column-wall energy dissipation component (1421) is located at the top of the steel-concrete composite bundle (11) and the composite wall (12), and is composed of angle steel (1421a), friction plate (1421b) and T-shaped steel plate (1421c). The angle steel (1421a) and T-shaped steel plate (1421c) are fixedly connected to the auxiliary column (114) and the composite wall (12). The friction plate (1421b) is arranged in pairs on both sides of the web of the T-shaped steel plate (1421c) and is connected to the angle steel (1421a) and T-shaped steel plate (1421c) to form a friction energy dissipation connector. The second column-wall energy dissipation component (1422) is a U-shaped steel plate. The U-shaped steel plate is located between the steel-concrete composite bundle (11) and the composite wall (12). The flange of the U-shaped steel plate is fixedly connected to the steel-concrete composite bundle (11) and the composite wall (12).

6. A multi-story cold-formed thin-walled steel building with earthquake toughness defense according to claim 1, characterized in that, The ordinary skin wall (2) includes an ordinary skin wall frame (21), a cladding panel (22), and a filling material (23). The ordinary skin wall frame (21) is formed by connecting several C-shaped cold-formed thin-walled steel columns (211) arranged at equal intervals and cold-formed thin-walled steel-wood composite guide rails (212). The cladding panel (22) is fixed to the outside of the ordinary skin wall frame (21), and the filling material (23) is located in the cavity formed by the ordinary skin wall frame (21) and the cladding panel (22). The cold-formed thin-walled steel-wood composite guide rails (212) are provided with reserved bolt holes for the connection between the ordinary skin wall (2) and the composite floor slab (3).

7. A multi-story cold-formed thin-walled steel building with earthquake toughness defense according to claim 1, characterized in that, The composite floor slab (3) includes a composite floor slab frame (31), cold-formed thin-walled steel-wood composite beams (32), structural slabs (33), a concrete layer (34), and a decorative surface layer (35); the composite floor slab frame (31) is formed by connecting cold-formed thin-walled steel support beams (311), cold-formed thin-walled steel support beam guide rails (312), and floor cross braces (313); the cold-formed thin-walled steel-wood composite beams (32) are composed of cold-formed thin-walled steel components (111) and wooden beams. The steel-wood composite beam (32) is located above and below the cold-formed thin-walled steel support beam guide rail (312) and is fixedly connected; the structural plate (33) is divided into a first structural plate (331) and a second structural plate (332). The first structural plate (331) and the second structural plate (332) are fixed above and below the composite floor frame (31) respectively. The concrete layer (34) is located directly above the first structural plate (331), and the decorative surface layer (35) is located directly above the concrete layer (34).

8. A prefabrication and assembly method for a multi-story cold-formed thin-walled steel building with earthquake toughness defense, characterized in that, Includes the following steps: First, the prefabrication of steel pipe concrete bundles (11), composite walls (12), ordinary skin walls (2) and composite floor slabs (3) is completed according to requirements; Then, the prefabricated components are installed on the construction site. The installation process is as follows: Installation of the first-floor steel-concrete composite wall (1) and ordinary skin wall (2): After installing the steel-concrete composite bundle (11) at the designed position, the steel-concrete composite bundle (11) is fixedly connected to the foundation through the first connector (411), the third connector (413), the reset disc spring (13), and the auxiliary column energy dissipation component (141); the composite wall (12) is installed between adjacent steel-concrete composite bundles (11) and fixedly connected through the column-wall energy dissipation component (142); cold-cooled steel-concrete composite bundles (11) are installed at the target installation position of the ordinary skin wall (2). After the cold-formed thin-walled steel-wood composite beam (32) is fixedly connected to the foundation, the ordinary skin wall (2) is installed directly above the cold-formed thin-walled steel-wood composite beam (32), so that the cold-formed thin-walled steel-wood composite bottom guide rail of the ordinary skin wall (2) is snapped and fixedly connected to the cold-formed thin-walled steel-wood composite beam (32); the ordinary skin wall (2) and the steel pipe concrete bundle (11) are fixedly connected by double-jointed cold-formed thin-walled I-beams (421) to complete the installation of the first-floor steel pipe concrete bundle-composite wall (1) and the ordinary skin wall (2); Install the composite floor slab (3): Install the first connector (411) at the center of the steel-concrete composite bundle (11) and fix it to the top of the central column (113); after installing the composite floor slab (3) directly above the steel-concrete composite bundle-composite wall (1) and the ordinary skin wall (2), snap the cold-formed thin-walled steel-wood composite top guide rail of the ordinary skin wall (2) with the cold-formed thin-walled steel-wood composite beam (32) and fix it; directly above each auxiliary column (114), install the second connector... The connecting parts (412) are arranged in pairs inside the cold-formed thin-walled steel floor support beam guide rail (312) and are fixedly connected to the web of the cold-formed thin-walled steel floor support beam guide rail (312). At the same time, the second connecting part (412) is fixedly connected to the first connecting part (411) and the top of the auxiliary column (114). The cold-formed thin-walled angle steel (422) is installed on the top of the composite wall (12) and the top of the composite wall (12) is fixedly connected to the composite floor (3) to complete the installation of the composite floor (3). Install the second layer of steel-concrete composite wall (1) and ordinary skin wall (2): After installing the second layer of steel-concrete composite wall (11) directly above the first layer of steel-concrete composite wall (11), fix the bottom of each central column (113) of the second layer to the first connector (411) at the top of the central column (113) of the first layer; after installing the third connector (413) directly below each auxiliary column (114) of the second layer, fix the top plate of the second connector (412) directly above the auxiliary column (114) of the first layer, the composite floor slab (3), and the bottom plate of the third connector (413) directly below the auxiliary column (114) of the second layer, and fix the pre-construction of the composite floor slab (3). Leave space for later installation and seal it; after fixing the bottom of the second auxiliary column (114) to the top plate of the third connector (413) directly below it with the reset disc spring (13), fix the first corrugated steel plate (1411) and pad (1413) to the side wall of the second auxiliary column (114), and fix the second corrugated steel plate (1412) to the side plate of the third connector (413); install the second composite wall (12) and ordinary skin wall (2) in the same way as installing the first layer steel pipe concrete bundle-composite wall (1) and ordinary skin wall (2), and complete the installation of the second layer steel pipe concrete bundle-composite wall (1) and ordinary skin wall (2); Install the remaining layers of steel-concrete composite wall (1), ordinary skin wall (2) and composite floor slab (3) according to the above steps to complete the installation of the overall structure.

9. The prefabrication and assembly method for a multi-story cold-formed thin-walled steel building with earthquake toughness defense according to claim 8, characterized in that, The precast steel-concrete composite bundles (11), composite walls (12), ordinary skin walls (2), and composite floor slabs (3) are specifically as follows: Multiple cold-formed thin-walled steel components (111) are spliced ​​together to form an irregular column with a flush top and a central column (113) with a lower end longer than the auxiliary columns (114) on both sides. Then, a reinforcing steel plate (115) is installed at the bottom of the irregular column, and the pre-embedded bolts and bearing steel plate (116) are installed in the cavity of the irregular column according to the design requirements. Finally, fine stone concrete (112) is poured into the irregular column to complete the prefabrication of the steel pipe concrete bundle (11). After inserting several cold-formed thin-walled steel vertical keels (1212) at equal intervals into the bottom cold-formed thin-walled steel horizontal keels (1211) of the grid-like wall frame (121) and fixing them together, install the first row of lightweight concrete filler blocks (122) and reserve space for post-grouting (1214); slot the cold-formed thin-walled steel horizontal brace (1213) at the designed position, and pass the cold-formed thin-walled steel vertical keels (1212) through the cold-formed thin-walled steel horizontal brace (1213), so that the first row of lightweight concrete filler blocks (122) is embedded in the cold-formed thin-walled steel horizontal brace (1213). Inside; install the remaining rows of lightweight concrete filler blocks (122) and cold-formed thin-walled steel cross braces (1213) in sequence and reserve a grouting space (1214) for later grouting; install the top cold-formed thin-walled steel cross braces (1211) of the grid wall frame (121); pour high-strength concrete (123) into the grouting space (1214) and attach an FRP reinforcement layer (124) to the outside of the high-strength concrete (123); install the second cover panel (125) on both sides of the grid wall frame (121) to complete the prefabrication of the composite wall (12); Wooden beams are pasted onto the designed positions of the cold-formed thin-walled steel components to form a cold-formed thin-walled steel-wood composite guide rail (212); then, C-shaped cold-formed thin-walled steel columns (211) are inserted at equal intervals into the cold-formed thin-walled steel-wood composite guide rail (212) and fixedly connected to form a common skin wall frame (21); cover panels (22) are installed on both sides of the common skin wall frame (21), and filling material (23) is embedded into the common skin wall frame (21) to complete the prefabrication of the common skin wall (2); After the cold-formed thin-walled steel support beam (311), the cold-formed thin-walled steel support beam guide rail (312) and the floor cross brace (313) are fixedly connected to form a composite floor slab frame (31), the cold-formed thin-walled steel-wood composite beam (32) is fixedly connected to the upper and lower flanges of the cold-formed thin-walled steel support beam guide rail (312); the first structural plate (331) and the second structural plate (332) are fixedly connected to the composite floor slab frame (31), and after reserving the space for subsequent installation in the composite floor slab (3), concrete (34) is poured above the first structural plate (331) and the decorative surface layer (35) is installed to complete the prefabrication of the composite floor slab (3).

10. A prefabrication and assembly method for a multi-story cold-formed thin-walled steel building with earthquake toughness defense according to any one of claims 8 or 9, characterized in that, Fixed connections between structural components include pre-embedded bolts or bolt-fixed connections.

Images