A prefabricated concrete shear wall structure with replaceable steel energy-dissipating connections

Abstract

The present invention relates to an assembled concrete shear wall structure with replaceable steel energy-absorbing connections, comprising a prefabricated shear wall, a replaceable steel connection component and a foundation. A U-shaped steel plate is embedded in the lower end of the prefabricated shear wall, and the vertical steel bars of the shear wall are welded to the flanges on both sides of the embedded U-shaped steel plate, and a number of studs are welded on the flanges on both sides of the embedded U-shaped plate; the replaceable steel connection component comprises compression-only pads at both ends, a middle pad beam, a tension-only connection end plate, a shear-type energy-absorbing connection plate, a connection angle steel and a number of bolts. Under the action of seismic loads, the seismic force is decoupled by the compression pads being only subjected to pressure, the tension-type connection end plates being only subjected to tension, and the shear-type energy-absorbing connection plates being only subjected to shear, thereby avoiding damage to the upper shear wall. The new assembled shear wall ensures that the upper shear wall can remain intact by concentrating the damage to the replaceable steel connection parts. By replacing the damaged steel connectors, the structure can quickly restore its seismic performance and realize the recoverability of the structural function.

Description

Technical Field

[0001] The invention belongs to the field of assembled concrete shear walls, and in particular relates to a replaceable assembled steel connection shear wall structure and a construction method thereof. Background Art

[0002] Prefabricated structures have the advantages of low energy consumption, guaranteed engineering quality, low safety hazards, high production efficiency, low labor costs, energy conservation and environmental protection, and reduced pollution. They are called green buildings and are an important development direction in the engineering field. However, in the design of traditional prefabricated reinforced concrete structures, the design principle is equivalent to cast-in-place integral structures. At present, it can only achieve strength and stiffness equivalent to cast-in-place structures, and the seismic performance is usually poor. The connection area of ​​the prefabricated structure is often a weak link, which can easily cause damage to the connection of the prefabricated shear wall structure, thereby causing damage to the overall structure. Therefore, the connection of the prefabricated concrete shear wall structure needs to be optimized and improved, and a new high-performance prefabricated concrete shear wall connection method needs to be developed. While meeting the convenience of construction, the recoverability of the structural function should also be considered, that is, it can continue to be put into use after a simple repair and replacement after a disaster. Therefore, the prefabricated concrete shear wall connection method is required to be detachable and replaceable.

[0003] Concentrating the damage of the structure in the replaceable area and replacing the replaceable components in time when they are damaged can quickly restore the usability of the structure. This design has been gradually applied and is an important development trend in the field of prefabricated shear wall structures. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an assembled concrete structure with replaceable steel energy-absorbing connections. The connection structure is rigid in normal use and is in an elastic stage even under small earthquakes. Under moderate or large earthquakes, the energy-absorbing and shock-absorbing elements at the connection parts enable the structure to have good energy-absorbing capacity and the main structure is not damaged. At the same time, it can provide replaceable and repairable functions after moderate or large earthquakes, thereby ensuring the seismic safety of the structure and reducing the cost of post-disaster repair. The structure can be widely used in assembled shear wall structures in earthquake zones.

[0005] To achieve the above problems.

[0006] The solution of the present invention is:

[0007] An assembled concrete shear wall structure with replaceable steel energy-absorbing connections comprises a prefabricated shear wall, which is connected to a foundation via an energy-absorbing connection component;

[0008] A U-shaped steel plate is installed at the lower end of the prefabricated shear wall;

[0009] The energy-absorbing connection components include compression-only pads, tension-only connection end plates, and shear-type energy-absorbing connection plates; compression-only pads are placed at both ends of the connection between the prefabricated shear wall and the foundation, and an intermediate pad beam is provided between the two compression-only pads;

[0010] The tension-only connection end plates are located on both sides of the compression-only pads, and the upper ends of the tension-only connection end plates are fixed to the prefabricated shear wall, and the lower ends are fixed to the foundation;

[0011] The shear type energy absorbing connecting plates are located on both sides of the middle cushion beam, the upper ends of the shear type energy absorbing connecting plates are fixed to the prefabricated shear wall, and the lower ends are fixed to the foundation.

[0012] Furthermore, circular bolt holes are provided on the flanges on both sides of the embedded U-shaped steel plate for bolt connection, and studs are provided on the flanges on both sides of the embedded U-shaped steel plate to facilitate better transmission of the upper shear force downward.

[0013] Furthermore, the connections between the prefabricated shear wall, the energy-absorbing connection components and the foundation are all connected and fixed by high-strength bolts through corresponding bolt holes.

[0014] Furthermore, the compression-only pad is made of H-shaped steel, stiffening ribs are arranged on both sides of the H-shaped steel web, and holes are opened in the middle of the web and the stiffening ribs to weaken the compression-only pad, so that the compression-only pad is destroyed before the upper concrete.

[0015] Furthermore, the middle cushion beam is made of H-shaped steel, and stiffening ribs are arranged on both sides of the H-shaped steel web.

[0016] Furthermore, bolt holes are provided on the upper end of the tension-only connection end plate and corresponding to the embedded U-shaped steel plate.

[0017] Furthermore, the tension-only connection end plate is weakened by opening a slit in the middle, so that the tension-only connection end plate yields before the vertical force-bearing steel bars of the prefabricated shear wall hidden column; further, a vertical elliptical bolt hole is provided at the lower end of the tension-only connection end plate, so that the tension-only connection end plate on the compression side can release pressure by vertical sliding under the action of horizontal thrust, so that the tension-only connection end plate is only subjected to tension.

[0018] Furthermore, bolt holes are arranged at the upper end of the shear type energy dissipation connecting plate corresponding to the embedded U-shaped steel plate, and round bolt holes are arranged at the lower end.

[0019] Furthermore, the shear-type energy-absorbing connecting plate is weakened in the middle by at least one of a circular hole, a vertical slit, and a horizontal slit.

[0020] Furthermore, the tension-type connecting end plate and the lower end of the shear-type energy-absorbing connecting plate are connected and fixed by connecting angle steel and a foundation.

[0021] The present invention provides an assembled concrete structure with replaceable steel energy-absorbing connections. Under the action of an earthquake, the seismic force can be decoupled by subjecting only the compression-type pads to compression, only the tension-type connection end plates to tension, and the shear-type energy-absorbing connection plates to shear, so that the main structure is not damaged. After the earthquake, the damaged components of the replaceable steel connection parts can be replaced and repaired in time, so that the structure can be quickly put into use. Compared with previous connection methods, the construction is more convenient and faster, and the complexity of post-earthquake repair is reduced.

[0022] Compared with existing connection technologies, this discovery has the following advantages:

[0023] 1. The assembled concrete shear wall structure with replaceable steel energy-absorbing connections of the present invention ensures that the main structure is not damaged by first yielding and absorbing energy in the replaceable steel connection area, and after an earthquake, only the damaged components in the replaceable steel connection area need to be repaired or replaced to restore the structure to its functional use.

[0024] 2. The present invention provides a prefabricated concrete shear wall structure with replaceable steel energy-absorbing connections. By opening a vertical elliptical bolt hole at the lower end of the tension-type connection end plate, the tension-type connection end plate at the compression end can release pressure through vertical sliding, ensuring that the tension-type connection end plate is only subjected to tension but not pressure.

[0025] 3. The assembled concrete shear wall structure with replaceable steel energy-absorbing connections of the present invention performs different weakening patterns on the components in the replaceable steel connection area to ensure that the replaceable steel connection components are destroyed before the main structure, thereby achieving the purpose of replacement and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Front view of the assembled concrete shear wall structure with replaceable steel energy-absorbing connections Figure 1 .

[0027] Figure 2 Front view of the assembled concrete shear wall structure with replaceable steel energy-dissipating connections according to the present invention Figure 2 .

[0028] Figure 3 for Figure 1 Middle AA section view.

[0029] Figure 4 for Figure 2 Intended for compression-only pads.

[0030] Figure 5 for Figure 2 Schematic diagram of the middle pad beam.

[0031] Figure 6 for Figure 2Middle BB cross-section.

[0032] Figure 7 for Figure 1 Plan view of the end plate of the tension-only connection.

[0033] Figure 8 for Figure 1 Plan view of medium shear type energy dissipation connection plate.

[0034] Fig. 9 for Figure 1 Schematic diagram of connecting angle steel at both ends.

[0035] Fig.10 for Figure 1 Schematic diagram of the middle connecting angle steel.

[0036] Fig.11 for Figure 3 Schematic diagram of embedded steel plate.

[0037] Explanation of the numbers in the figure: 01—prefabricated shear wall; 02—embedded U-shaped steel plate; 03—tension-only connection end plate; 04—shear-type energy-absorbing connection plate; 05—compression-only pad; 06—middle pad; 07—connection angle steel at both ends; 08—middle connection angle steel; 09—foundation; 010—circular bolt hole; 011—vertical elliptical bolt hole; 012—tension high-strength bolt; 013—high-strength bolt; 014—embedded high-strength bolt; 015—embedded steel plate; 016—first vertical seam; 017—circular hole; 018—horizontal seam; 019—vertical seam 2; 020—semicircular hole; 021—stiffener 1; 022—stiffener 2; 023—stiffener 3; 024—stud; 025—shear wall vertical reinforcement.

[0038] Specific construction method The present invention is further described in detail below with reference to the accompanying drawings and specific construction methods.

[0039] like Figure 1-11 As shown, the present invention provides a prefabricated concrete shear wall structure with replaceable steel energy-absorbing connections, including a prefabricated shear wall 01, replaceable steel connection components and a foundation 09. The replaceable steel connection part includes a compression-only pad 05, a tension-only connection end plate 03, and a shear-type energy-absorbing connection plate 04.

[0040] The prefabricated shear wall 01 and the components of the steel connection area are all processed and manufactured in the factory, and after being manufactured, they are transported to the construction site for installation.

[0041] like Figure 3As shown, the vertical steel bars 025 of the prefabricated shear wall 01 are welded to the flanges at both ends of the embedded U-shaped steel plate 02. The embedded U-shaped steel plate 02 and the prefabricated shear wall 01 are cast together. Studs 024 are arranged on the two flanges of the embedded U-shaped steel plate 02 to facilitate better downward transmission of the upper shear force, and circular bolt holes 010 are arranged at the designed position.

[0042] like Figure 4 , 6 As shown, the compression-only pad 05 is only placed at both ends of the connection between the prefabricated shear wall 01 and the foundation 09. The compression-only pad 05 adopts H-shaped steel, and stiffening ribs 021 are set on both sides of the H-shaped steel web, and semicircular holes 020 are opened at the same position between the web and the stiffening rib to weaken the compression-type pad.

[0043] like Figure 5 , 6 As shown, the middle cushion beam 06 is made of H-shaped steel, and stiffening ribs 022 are arranged on both sides of the H-shaped steel web.

[0044] like Figure 7 As shown, the tension-only connecting end plate 03 is placed outside two compression-only pads 05, and a circular bolt hole 010 is set at the same position of the upper end 03 of the tension-only connecting end plate and the embedded U-shaped steel plate 02, and is fixedly connected by tension high-strength bolts 012. The tension-only connecting end plate 03 is opened in the middle with a first vertical seam 016 to weaken it, and a vertical elliptical bolt hole 011 is set at the lower end.

[0045] like Figure 8 As shown, a circular bolt hole 010 is provided at the upper end of the shear type energy absorbing connecting plate 04 relative to the embedded U-shaped steel plate 02, and is fixedly connected by pulling high-strength bolts 012. A circular bolt hole 010 is also provided at the corresponding position of the lower end. The shear type energy absorbing connecting plate 04 is provided with three weakening forms in the middle, namely, a circular hole 017, a vertical seam 018 and a horizontal seam 019.

[0046] like Fig. 9 , 10 As shown, the connecting angle steels 07 at both ends and the middle connecting angle steel 08 are provided with circular bolt holes 010 at positions corresponding to the lower ends of the tension-type connecting end plate and the shear-type energy-absorbing connecting plate on one side, and are fixedly connected by high-strength bolts 013; circular bolt holes 010 are provided at positions corresponding to the embedded steel plates 015 on the other side, and the connecting angle steels 07 at both ends and the middle connecting angle steel 08 are fixed to the foundation 09 by high-strength bolts 014 embedded in the foundation 09, and stiffening ribs 023 are provided on the connecting angle steels 07 at both ends and the middle connecting angle steel 08.

[0047] like Fig.11As shown, the upper surface of the embedded steel plate 015 is flush with the upper surface of the foundation, and is used to fix the verticality of the embedded high-strength bolts 014.

[0048] The foundation 09 is pre-embedded with high-strength bolts 014 at corresponding positions, and the verticality of the pre-embedded high-strength bolts 014 is ensured by pre-embedded steel plates 015. When the assembled concrete shear wall with replaceable steel energy-absorbing connection is assembled on site, the tension-only connecting end plate 03, the lower end of the shear-type energy-absorbing connecting plate 04 and the connecting angle steels 07 at both ends and the middle connecting angle steel 08 on one side of the assembled shear wall can be first fixed with high-strength bolts 013, and then the connecting angle steels 07 at both ends, the middle connecting angle steel 08 and the foundation 09 are fixed by the pre-embedded high-strength bolts 014 pre-embedded in the foundation 09, and then the compression-only pad block 00 can be hoisted. 5. Pad beam 06 and prefabricated shear wall 01, and then fix the tension-only connecting end plate 03, the lower end of the shear-type energy-absorbing connecting plate 04 and the connecting angle steels 07 at both ends and the middle connecting angle steel 08 on the other side through high-strength bolts 013, and then fix the connecting angle steels 07 at both ends, the middle connecting angle steel 08 and the foundation 09 through the pre-embedded high-strength bolts 014 embedded in the foundation 09, and finally fix the tension-only connecting end plate 03, the upper end of the shear-type energy-absorbing connecting plate 04 and the prefabricated shear wall 01 through the tension high-strength bolts 012 to complete the assembly of the prefabricated concrete shear wall with replaceable steel energy-absorbing connection.

[0049] The working principle of the present invention is as follows: Under the action of an earthquake, the prefabricated concrete shear wall structure with replaceable steel energy-absorbing connections of the present design can decouple the seismic force by only subjecting the compression-type pads to pressure, only subjecting the tension-type connection end plates to tension, and subjecting the shear-type energy-absorbing connection plates to shear, so as to concentrate the earthquake damage on the replaceable steel connection components and ensure that the upper shear wall is not damaged; after the earthquake, only the damaged replaceable steel connection components need to be replaced to quickly restore the use function of the prefabricated shear wall, which greatly reduces the workload and difficulty of post-earthquake repair.

[0050] The above description of the embodiments is to facilitate the understanding and application of the present technology by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present technology is not limited to the embodiments herein, and improvements and modifications made to the present technology by those skilled in the art based on the disclosure of the present invention should be within the scope of protection of this patent.

Claims

1. An assembled concrete shear wall structure with replaceable steel energy-dissipating connections, characterized in that: It includes a prefabricated shear wall, which is connected to the foundation through an energy-absorbing connection component; a U-shaped steel plate is installed at the lower end of the prefabricated shear wall; The energy-absorbing connection components include compression-only pads, tension-only connection end plates, and shear-type energy-absorbing connection plates; the compression-only pads are made of H-shaped steel, and the compression-only pads are placed at both ends of the connection between the prefabricated shear wall and the foundation, and an intermediate pad beam is provided between the two compression-only pads; The tension-only connection end plates are located on both sides of the compression-only pads, and the upper ends of the tension-only connection end plates are fixed to the prefabricated shear wall, and the lower ends are fixed to the foundation; A vertical elliptical bolt hole is arranged at the lower end of the tension-only connection end plate, and under the action of horizontal thrust, the tension-only connection end plate on the compression side releases pressure by vertical sliding, so that the tension-only connection end plate is only subjected to tension; The shear type energy absorbing connecting plate is located on both sides of the middle cushion beam, the upper end of the shear type energy absorbing connecting plate is fixed to the prefabricated shear wall, and the lower end is fixed to the foundation; The shear type energy dissipation connecting plate is weakened in the middle by at least one of a circular hole, a vertical slit, and a horizontal slit.

2. The assembled concrete shear wall structure with replaceable steel energy-dissipating connections according to claim 1, characterized in that: The connections between prefabricated shear walls, energy-absorbing connecting components and foundations are all fixed by high-strength bolts through corresponding bolt holes.

3. The assembled concrete shear wall structure with replaceable steel energy-dissipating connections according to claim 1, characterized in that: The compression-only pad is provided with stiffening ribs on both sides of the H-shaped steel web, and a hole is opened in the middle of the web and the stiffening ribs to weaken the compression-only pad, so that the compression-only pad is destroyed before the upper concrete.

4. The assembled concrete shear wall structure with replaceable steel energy-dissipating connections according to claim 1, characterized in that: The middle cushion beam is made of H-shaped steel, and stiffening ribs are arranged on both sides of the H-shaped steel web.

5. The assembled concrete shear wall structure with replaceable steel energy-dissipating connections according to claim 1, characterized in that: Bolt holes are arranged on the upper end of the tension-only connection end plate and corresponding to the embedded U-shaped steel plate.

6. The assembled concrete shear wall structure with replaceable steel energy-dissipating connections according to claim 1, characterized in that: The tension-only connection end plate is weakened by opening a slit in the middle, so that the tension-only connection end plate yields before the vertical force-bearing steel bars of the prefabricated shear wall hidden column.

7. The assembled concrete shear wall structure with replaceable steel energy-dissipating connections according to claim 1, characterized in that: Bolt holes are arranged at the upper end of the shear type energy dissipation connecting plate corresponding to the embedded U-shaped steel plate, and round bolt holes are arranged at the lower end.

8. The assembled concrete shear wall structure with replaceable steel energy-dissipating connections according to claim 1, characterized in that: The lower ends of the tension-type connection end plates and the shear-type energy-absorbing connection plates are connected and fixed by connecting angle steels and a foundation.

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