Wall corner component with self-centering energy dissipation, assembled shear wall, and construction method

Abstract

The present disclosure relates to an assembled shear wall, specifically a wall corner component with self-centering energy dissipation, including an upper connector, a middle connector, a lower connector and a foamed aluminum block. The upper connector is connected to the middle connector through an energy dissipation steel bar, and the middle connector is connected to the lower connector through a shape memory alloy bar. The bottom of the foamed aluminum block is offset from the bottom of the lower connector, and the top of the foamed aluminum block runs through a first limit hole and offsets the lower side of the middle connector. The wall corner components provided by the present disclosure have both energy dissipation capacity and self-centering ability, which is helpful to realize the rapid recovery of the post-earthquake use function of the shear wall.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of assembled shear walls, especially to a wall corner component with self-centering energy dissipation, an assembled shear wall, and a construction method.BACKGROUND

[0002] With the rise in labor costs and the growing awareness of environmental protection and sustainable development, industrial production has become an inevitable trend in the construction industry. The assembled reinforced concrete shear wall offers advantages such as standardized production, energy efficiency, environmental friendliness, and a short construction period, aligning well with the development goals of the construction sector. However, previous seismic damage observations indicate that the wall corner of shear walls often sustains severe damage during earthquakes, leading to the loss of structural functionality and making post-earthquake repair either difficult or prohibitively expensive.

[0003] The recoverable functional structure incorporating replaceable components is a novel structural system developed in recent years. Its core design principle is that under seismic action, the replaceable components installed in the structure absorb and dissipate seismic energy, thereby concentrating damage within these components and protecting the main structure from serious harm. After an earthquake, structural function can be restored simply by replacing the damaged replaceable parts, avoiding the high costs associated with demolishing and rebuilding traditional structures.

[0004] In current research and practical applications, replaceable components often utilize energy dissipation devices (such as metal dampers or friction dampers). However, these devices tend to experience significant residual deformation during energy dissipation, making post-earthquake replacement challenging and consequently impeding the recovery of structural functionality.SUMMARY

[0005] The purpose of the present disclosure is to provide a wall corner component with self-centering energy dissipation, an assembled shear wall, and a construction method, the wall corner component has both energy dissipation capacity and self-centering capacity, which is helpful to realize the rapid recovery of the use function of the shear wall after the earthquake.

[0006] In order to achieve the above purpose, the present disclosure provides a wall corner component with self-centering energy dissipation, including an upper connector, a middle connector, a lower connector and a foamed aluminum block, the upper connector is connected to the middle connector through an energy dissipation steel bar, the energy dissipation steel bar includes first anchoring sections and an energy dissipation section, the first anchoring sections are set at both ends of the energy dissipation section, the first anchoring section is a cylindrical structure with a thread, and the energy dissipation section is an hourglass structure; the middle connector is connected to the lower connector through a shape memory alloy bar, the shape memory alloy bar is dumbbell-shaped, including second anchoring sections and a deformation section, the second anchoring sections are set at both ends of the deformation section, and the second anchoring section is provided with a thread connected to a nut; a middle part of the lower connector is provided with a first limit hole, and the foamed aluminum block is set in the first limit hole, a bottom of the foamed aluminum block is connected to a bottom of the lower connector, a top of the foamed aluminum block runs through the first limit hole and attaches a lower side of the middle connector.

[0007] In some embodiments, the upper connector is a T-shaped structure, including a first flange plate set horizontally at a top and a first web vertically connected to a lower side of the first flange plate, multiple first connecting holes are provided on the first flange plate, and multiple first connecting holes are evenly distributed on both sides of the first web, multiple second limit holes are provided on the first web, and a middle part of the energy dissipation steel bar is set inside the second limit hole.

[0008] In some embodiments, the middle connector is a U-shaped structure, including a second flange plate set horizontally at the bottom and a second web vertically connected to the upper side of the second flange plate, a middle part of the second flange plate is provided with a limit slot, and two sides of the limit slot are connected to the shape memory alloy bar, a second connecting hole is connected to a middle part of the U-shaped structure and attaches the limit slot, a second web is provided with a third limit hole corresponding to the second limit hole, and the two ends of the energy dissipation steel bar are connected to nuts through the third limit hole.

[0009] In some embodiments, the lower connector includes a third flange plate and a fourth flange plate, the third flange plate and the fourth flange plate are arranged in parallel vertically, a middle of the third flange plate is provided with a first limit hole, and the two sides of the first limit hole are provided with third connecting holes connected to the shape memory alloy bar, multiple stiffening plates are set between the third flange plate and the fourth flange plate, multiple fourth connecting holes are set on the fourth flange plate, and the fourth connecting holes are set alternately with the stiffening plates.

[0010] In some embodiments, the energy dissipation steel bar is made of mild steel with low yield point, a minimum section diameter of the energy dissipation section is 0.5 times a diameter of the anchoring section, and a length of the energy dissipation section is less than or equal to 5 times the minimum section diameter, so as to ensure that the energy dissipation steel bar has good hysteretic energy dissipation capacity and fatigue resistance.

[0011] In some embodiments, by applying torque to the nut, a tensile force can be applied to the shape memory alloy bar, thereby providing self-centering ability for the wall corner components.

[0012] In some embodiments, a length of the deformation section is less than or equal to 2 times a thickness of the shear wall.

[0013] In some embodiments, the foamed aluminum block is a block made of porous metal materials with aluminum or aluminum alloy as a matrix and containing a large number of connected or closed pores, it has the characteristics of light weight, high specific strength, high specific stiffness, high damping and shock absorption performance; a top and a bottom of the foamed aluminum block are in contact with the middle connector and the lower connector respectively to provide a compressive bearing capacity of the wall corner components.

[0014] An assembled shear wall includes the above-mentioned wall corner components with self-centering energy dissipation, a bottom compressive block, prefabricated wall panels, a steel connector, post-cast floor and foundation; the wall corner components and the bottom compressive block are located at a bottom of the assembled shear wall, the wall corner components are set on both sides of the bottom compressive block; a bottom of the wall corner component and the bottom compressive block are fixedly connected to a top of the foundation, a bottom of the bottom prefabricated wall panel is fixedly connected to a top of the wall corner components and the bottom compressive block; a top of the bottom prefabricated wall panel is fixedly connected to a rest of the prefabricated wall panels through bolts and steel connectors, a post-cast floor is located at a connection of each prefabricated wall panel and integrated with steel connector by pouring.

[0015] In some embodiments, the bottom compressive block includes a box, an end plate, an outer steel plate, a tension steel bar and concrete, the end plate is equipped with an elliptical fifth connecting hole connected to a bolt, a box is an open structure, a top of the box is located on one side of the fifth connecting hole and is fixedly connected to a bottom of the end plate, a side of the box is connected to the outer steel plate, an outer steel plate is wrapped on a circumference of the box, a bottom of the outer steel plate is fixedly connected to the end plate, multiple evenly distributed tension steel bars are arranged in the outer steel plate, and an inner cavity of the outer steel plate is poured with concrete.

[0016] In some embodiments, the prefabricated wall panel includes a longitudinal reinforcement, stirrups, a bolt sleeve and concrete, the longitudinal reinforcement and stirrups are vertically connected to each other, concrete is poured outside of longitudinal reinforcement and stirrups, the longitudinal reinforcement includes edge member longitudinal reinforcements, web longitudinal reinforcement and force transmission longitudinal reinforcement, both ends of edge member longitudinal reinforcements are connected to bolt sleeves through threads, and an outer end of force transmission longitudinal reinforcement is connected to bolt sleeves through threads.

[0017] In some embodiments, the steel connector is a rectangular steel pipe structure, an upper end and a lower end of a contact between the steel connector and the prefabricated wall panel are equipped with bolt holes, the bolt hole realizes a connection between the steel connector and the prefabricated wall panel through the bolt. Steel connectors are generally arranged at a floor height of a shear wall structure, and a height of the steel connector is consistent with a thickness of the floor.

[0018] In some embodiments, the post-cast floor includes a longitudinal reinforcement, stirrups, and concrete, the longitudinal reinforcement and stirrups are vertically connected to each other, and the concrete is poured outside of the longitudinal reinforcement and stirrups. The cast-in-place floor can adopt a construction form of prefabricated floor+post-cast concrete layer or integral casting of the floor. Among them, the longitudinal reinforcement of the post-cast floor can penetrate an inner cavity of the steel connector and enhance an integrity of the floor and wall panels.

[0019] The foundation also includes longitudinal steel bars, stirrups, and concrete, the longitudinal steel bars and stirrups are vertically connected to each other, and the concrete is poured outside of the longitudinal steel bars and stirrups. In an area connected to the wall corner components with self-centering energy dissipation, a foundation should also be pre-buried with a force-transfer steel bar with a bolt sleeve at one end to ensure a reliable connection between the wall corner component with self-centering energy dissipation and the foundation; for an area in contact with the bottom compressive block, a 20 mm deep slot should be set for a base bed-mortar in an installation of the bottom compressive block.

[0020] The above construction method for the assembled shear wall includes the following steps,

[0021] S1, completing a processing of the wall corner component with self-centering energy dissipation, bottom compressive block, prefabricated wall panels, steel connectors, and all kinds of embedded parts;

[0022] S2, arranging the longitudinal reinforcement and bolt sleeve in the embedded parts in a foundation formwork, in which the longitudinal reinforcement with bolt sleeve is welded with a foundation reinforcement cage, and then pouring concrete required for the foundation and maintaining to complete a foundation construction;

[0023] S3, installing the wall corner component with self-centering energy dissipation in a specified area of a top surface of the foundation, and fixedly connecting to the foundation through the fourth connecting hole of fourth flange plate of the lower connector by bolts; placing the bottom compressive block in the specified area of the top surface of the foundation, and performing a bed-mortar operation between the bottom compressive block and the foundation; after the bed-mortar reaches a design strength, hoisting the prefabricated wall panel of the bottom layer to a top of the wall corner component and the bottom compressive block with self-centering energy dissipation, and fixing to the first connecting hole of the first flange plate of the wall corner component and a fifth connecting hole of the end plate of the bottom compressive block through a corresponding connection structure of the prefabricated wall panel by the bolt to complete an installation of the bottom layer of the assembled shear wall;

[0024] S4, placing the steel connector on a top of the bottom prefabricated wall panel, connecting and fixing to a bolt sleeve of the bottom prefabricated wall panel by the bolt through a corresponding hole position of the steel connector; subsequently, hoisting an upper prefabricated wall panel above the steel connector, and connecting to the steel connector through a corresponding structure of the upper prefabricated wall panel by the bolt, repeating the step to complete an installation of each layer of prefabricated wall panel in turn;

[0025] S5, arranging the longitudinal reinforcement and stirrups required for the post-cast floor between the prefabricated wall panels of each layer, where the longitudinal reinforcement of the post-cast floor penetrates an inner cavity of the steel connector. After the reinforcement of the floor is lashed, pouring the concrete for the floor, when a concrete hardening reaches a design strength, the post-cast floor is completed, and an overall construction of the assembled shear wall is completed.

[0026] In some embodiments, the assembly process of the wall corner component with self-centering energy dissipation in S1 is as follows: firstly, placing the foamed aluminum block in the first limit hole of the lower connector, and then placing the middle connector on a top of the foamed aluminum block, so that the top of the foamed aluminum block is offset with a lower side of the middle connector; then, passing through the second connecting hole of the middle connector and the third connecting hole of the lower connector through the shape memory alloy bar, and realizing a connection between the middle connector and the lower connector by nut fastening; meanwhile, applying a rated torque to the nut to pre-tension the shape memory alloy bar; then, placing the first web of the upper connector in the limit slot of the middle connector and offsetting each other, placing the energy dissipation steel bar through the second limit hole of the upper connector and the third limit hole of the middle connector, and fixing an end of the energy dissipation steel bar by the nut.

[0027] The present disclosure adopts the above-mentioned wall corner component with self-centering energy dissipation, an assembled shear wall, and a construction method, and has the following beneficial effects:

[0028] (1) The present disclosure exhibits excellent seismic performance. By installing the wall corner components with self-centering energy dissipation on both sides at the bottom of the shear wall structure, it not only ensures stable loading-bearing capacity but also provides strong energy dissipation capability. Under compression, the components bear loads through foamed aluminum blocks, which are lightweight, high-strength, and can maintain a stable bearing capacity even after reaching their peak load, undergoing only compressive deformation. This ensures consistent load output under compression and prevents shear wall collapse due to loss of compressive capacity. Under tension, the components are supported by energy-dissipating steel bars and shape memory alloy bars, providing sufficient tensile capacity and a degree of redundancy. Even if individual energy-dissipating steel bars or shape memory alloy bars lose loading-bearing capacity under large deformation, the remaining components continue to function stably, ensuring reliable performance. Additionally, materials used in the wall corner components, such as aluminum foam, low-yield-point mild steel, and shape memory alloy, exhibit high energy absorption rates, effectively absorbing and dissipating seismic energy input into the shear wall structure during earthquakes, thereby enhancing structural safety. Moreover, the bottom compressive block of the shear wall structure is connected to the foundation only through grout, allowing separation from the foundation when the shear wall undergoes significant lateral displacement. This prevents bending failure of the module during an earthquake. Furthermore, the bottom compressive block adopts an encased steel plate configuration with opposing tension steel bars, providing high compressive bearing capacity and resistance to crushing failure.

[0029] (2) The present disclosure exhibits strong seismic resilience. During an earthquake, damage and plastic deformation of the shear wall are primarily concentrated in the wall corner components with self-centering energy dissipation, while the remaining parts remain largely intact. Thus, only the damaged wall corner components need replacement after an earthquake to restore the functionality of the shear wall structure. Within these components, plastic deformation mainly occurs in the energy-dissipating steel bars. The pre-tensioned shape memory alloy bars arranged around the components effectively reduce residual deformation, enabling self-centering of the components after an earthquake. This self-centering capability facilitates the shear wall's return to its original position, simplifying post-earthquake replacement of the replaceable wall corner components. Additionally, the wall corner components are connected to the upper wall and foundation using bolted joints, making the replacement process simple, quick, and labor-efficient, thereby enabling rapid recovery of the shear wall's functionality after an earthquake.

[0030] (3) The present disclosure supports modular production and prefabricated assembly of the structure. The primary components of the shear wall (excluding the foundation and post-cast floor) can be prefabricated in a factory, ensuring precision and quality control during manufacturing. Each component features regular dimensions, facilitating modular production and adaptability to shear wall structures with varying planar layout requirements. Furthermore, after transporting the prefabricated components to the construction site, the shear wall structure can be quickly assembled using bolted connections. This approach not only simplifies construction and ensures controllable connection quality, but also effectively guarantees structural safety. It significantly reduces labor requirements and shortens construction cycles, greatly improving construction efficiency and offering broad application potential.

[0031] The following is a further detailed description of the technical scheme of the present disclosure through drawings and implementation examples.BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG. 1 is a three-dimensional schematic diagram of the wall corner component with self-centering energy dissipation in Embodiment 1 of the present disclosure;

[0033] FIG. 2 is a side view of the wall corner component with self-centering energy dissipation in Embodiment 1 of the present disclosure;

[0034] FIG. 3 is an explosion diagram of the wall corner component with self-centering energy dissipation in Embodiment 1 of the present disclosure;

[0035] FIG. 4 is a side view of the energy dissipation steel bar in Embodiment 1 of the present disclosure.

[0036] FIG. 5 is a side view of the shape memory alloy bar in Embodiment 1 of the present disclosure;

[0037] FIG. 6 is a three-dimensional schematic diagram of the fabricated shear wall of Embodiment 2 of the present disclosure;

[0038] FIG. 7 is an explosion diagram of the fabricated shear wall in Embodiment 2 of the present disclosure;

[0039] FIG. 8 is a schematic diagram of the bottom compressive block of Embodiment 2 of the present disclosure;

[0040] FIG. 9 is a schematic diagram of the prefabricated wall panel of Embodiment 2 of the present disclosure;

[0041] FIG. 10 is a schematic diagram of the internal structure of the prefabricated wall panel in Embodiment 2 of the present disclosure;

[0042] FIG. 11 is a schematic diagram of the steel connector of Embodiment 2 of the present disclosure.MARKS IN THE FIGURES1, upper connector; 11, first flange plate; 111, first connecting hole; 12, first web; 121, second limit hole;

[0044] 2, the central connector; 21, second flange plate; 211, second connecting hole; 22, second web; 221, third limit hole; 23, limit slot;

[0045] 3, lower connector; 31, first limit hole; 32, third flange plate; 321, connecting hole three; 33, fourth flange plate; 331, fourth connecting hole; 34, stiffening plate;

[0046] 4, foamed aluminum block; 5, energy dissipation steel bar; 51, first anchoring section; 52, energy dissipation section; 6, shape memory alloy bar; 61, second anchoring section; 62, deformation section; 7, wall corner component;

[0047] 8, bottom pressure bearing module; 81, box; 82, end plate; 821, fifth connecting hole; 83, outsourcing steel plate; 84, pull steel bar;

[0048] 9, prefabricated wall panel; 91, longitudinal reinforcement; 911, edge member longitudinal reinforcement; 912, web longitudinal reinforcement; 913, force transmission longitudinal reinforcement; 92, stirrups; 93, bolt sleeve; 94, concrete;

[0049] 10, steel connector; 101, bolt hole; 11, post-cast floor; 120, foundation.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] The following is a further description of the present disclosure in combination with drawings and implementation examples. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with general skills in the field to which the present disclosure belongs. The above features mentioned in the present disclosure or the features mentioned in specific examples can be arbitrarily combined. These specific implementation examples are only used to illustrate the present disclosure and are not used to limit the scope of the present disclosure.Embodiment 1

[0051] As shown in FIG. 1 to FIG. 5, the present disclosure provides a wall corner component 7 with self-centering energy dissipation, including upper connector 1, middle connector 2, lower connector 3, and foamed aluminum block 4. The upper connector 1 is connected to the middle connector 2 through the energy dissipation steel bar 5, and the middle connector 2 is connected to the lower connector 3 through the shape memory alloy bar 6. The middle part of the lower connector 3 is provided with a first limit hole 31, and the foamed aluminum block 4 is set in the first limit hole 31. The bottom of the foamed aluminum block 4 is equal to the bottom of the lower connector 3, and the top of the foamed aluminum block 4 is equal to the lower side of the middle connector 2 through the first limit hole 31.

[0052] The upper connector 1 is a T-shaped structure, including a first flange plate 11 set transversely at the top and a first web 12 vertically connected to the lower side of the first flange plate 11. There are multiple first connecting holes 111 on the flange plate 11, and multiple first connecting holes 111 are evenly distributed on both sides of the first web 12, which is used to achieve a reliable connection with the prefabricated wall panel 9 through high-strength bolts. There are multiple second limit holes 121 on the first web 12, and the middle of the energy dissipation steel bar 5 is set in the second limit hole 121 to realize the limit and force transmission of the energy dissipation steel bar 5.

[0053] The middle connector 2 is a U-shaped structure, including a second flange plate 21 set horizontally at the bottom and a second web 22 vertically connected to the upper side of the second flange plate 21. The middle of the second flange plate 21 is provided with a limit slot 23. The size of the limit slot 23 is adapted to the size of the first web 12 of the upper connector 1. The first web 12 is connected to the middle of the U-shaped structure and offsets the limit slot 23. The two sides of the limit slot 23 are provided with a second connecting hole 211 connected to the shape memory alloy bar 6, which is used for the installation and fixation of the shape memory alloy bar 6. There is a third limit hole 221 corresponding to the second limit hole 121 on the second web 22. The two ends of the energy dissipation steel bar 5 run through the third limit hole 221 and are connected to the nut. The axial limit of the energy dissipation steel bar 5 is realized by the nut to prevent it from slipping.

[0054] The lower connector 3 includes the third flange plate 32, and the fourth flange plate 33, and the third flange plate 32 and the fourth flange plate 33 are arranged in parallel. There is a first limit hole 31 in the middle of the third flange plate 32, and the size of the first limit hole 31 is consistent with the plane size of the foamed aluminum block 4, which is used to limit the foamed aluminum block 4 and prevent its lateral offset. A third connecting hole 321 connected to the shape memory alloy bar 6 is arranged on both sides of the first limit hole 31, and the lower end of the shape memory alloy bar 6 is fixed with the nut. There are multiple stiffening plates 34 between the third flange plate 32 and the fourth flange plate 33, and the stiffening plates 34 are evenly distributed to enhance the integrity and deformation resistance of the lower connector 3. There are multiple fourth connecting holes 331 on the fourth flange plate 33. The fourth connecting holes 331 and the stiffening plates 34 are arranged alternately. It is used to connect to the foundation 120 through high-strength bolts to ensure the reliable fixation of the wall corner components 7 and the foundation 120.

[0055] The energy dissipation steel bar 5 is made of low-yield-point mild steel. The low-yield-point mild steel has good plastic deformation ability and can absorb and dissipate seismic energy through continuous shear plastic deformation. The energy dissipation steel bar 5 includes the anchoring section 51, and the energy dissipation section 52, and the anchoring section 51 is set at both ends of the energy dissipation section 52. The anchoring section 51 is a cylindrical structure with threads, which is easy to fix with the nut. The energy dissipation section 52 is an hourglass structure. The minimum section diameter of the energy dissipation section 52 is 0.5 times the diameter of the anchoring section, and the length of the energy dissipation section 52 is less than or equal to 5 times the minimum section diameter, so as to ensure that the energy dissipation steel bar 5 has good hysteretic energy dissipation capacity and fatigue resistance, and avoid premature fracture failure under earthquake action.

[0056] The shape memory alloy bar 6 is dumbbell-shaped, including the second anchoring section 61 and the deformation section 62, and the second anchoring section 61 is set at both ends of the deformation section 62. There is a thread connected to the nut on the second anchoring section 61, which is fixed by the nut with the middle connector 2 and the lower connector 3. By applying a torque to the nut, a tensile force can be applied to the shape memory alloy bar 6, thereby providing a self-centering capability for the wall corner component 7. The length of the deformation section 62 is less than or equal to 2 times the thickness of the shear wall. This length can ensure that the shape memory alloy bar 6 has enough deformation space under the action of an earthquake, and avoid the stability problem caused by being too long.

[0057] The foamed aluminum block 4 is a block made of porous metal materials with a large number of connected or closed pores based on aluminum or aluminum alloy. It has the characteristics of light weight, high specific strength, high specific stiffness, high damping, and shock absorption performance. The top and bottom of the foamed aluminum block 4 are in contact with the middle connector 2 and the lower connector 3, respectively, which are mainly used to provide the compressive bearing capacity of the wall corner component 7 to meet the bearing requirements of the shear wall corner under self-weight and seismic compression conditions.

[0058] The self-centering energy dissipation mechanism of the wall corner component 7 with self-centering energy dissipation:

[0059] The wall corner component 7 with self-centering energy dissipation is connected to the prefabricated wall panel 9 and the foundation 120 through high-strength bolts. Considering that the shear wall corner is similar to the axial force when subjected to earthquake action, and the demand for compressive bearing capacity is much higher than the demand for tensile bearing capacity, the wall corner component 7 with self-centering energy dissipation is designed as an axial force component with asymmetric tension and compression.

[0060] When the wall corner component 7 with self-centering energy dissipation is tensioned, the upper connector 1 (T-shaped steel member) is tensioned and lifted, and its first web 12 drives the middle connector 2 (U-shaped steel member) through the hinged energy dissipation steel bar 5 to lift synchronously. In this process, the upper connector 1 and the middle connector 2 maintain elastic deformation and no plastic damage. After the middle connector 2 is lifted, its bottom is out of contact with the top surface of the foamed aluminum block 4, and the foamed aluminum block 4 withdraws from the tensile force system. The energy dissipation section 52 of the energy dissipation steel bar 5 produces shear deformation under the action of tension. Because the low-yield-point mild steel has good plastic deformation ability, it can absorb and dissipate the energy input by the earthquake through continuous shear plastic deformation, and the hourglass-shaped structure of the energy dissipation section 52 ensures that it has stable hysteretic energy dissipation ability and fatigue resistance to avoid premature fracture failure.

[0061] Meanwhile, the shape memory alloy bar 6 is further elongated with the lifting of the middle connector 2, and its two ends are fastened with the middle connector 2 and the lower connector 3 through the high-strength nut, and the pre-tensioning has been achieved by applying the rated torque to the nut in the assembly stage of the component. The shape memory alloy has the superelastic characteristics of restoring the original shape after being deformed, and the reset force will be restored to the original length after being stretched. Meanwhile, the pre-tension state makes the shape memory alloy bar 6 always maintain a certain tensile force, which can offset the residual deformation caused by part of the energy dissipation steel bar 5, and promote the upper connector 1 and the middle connector 2 to return to the initial position to realize the self-reset of the component.

[0062] When the wall corner component 7 with self-centering energy dissipation is under pressure, the upper connector 1 is under pressure, and the bottom surface of the first web 12 is in close contact with the second flange plate 21 of the middle connector 2, which drives the middle connector 2 to press down synchronously, so that the bottom of the middle connector 2 is in close contact with the top surface of the foamed aluminum block 4, and the foamed aluminum block 4 enters the compression force system.

[0063] The foamed aluminum block 4 has the characteristics of light weight, high specific strength, and stable compressive bearing capacity. When it is compressed, the block produces compressive deformation, and the internal pores are gradually compacted. However, after reaching the peak bearing pressure, the bearing capacity can be maintained for a long time, so as to avoid the collapse of the shear wall caused by the sudden drop of the compressive bearing capacity, and meet the demand of 7 pairs of high compressive bearing capacity of the wall corner components. Meanwhile, the material gap is gradually compacted to dissipate the energy of the earthquake input and the structure, which is beneficial to the seismic resistance of the structure.

[0064] Moreover, during the compression process, the energy dissipation steel bar 5 has no additional deformation (because the upper connector 1 and the middle connector 2 transmit the pressure through direct contact, no shear force is generated on the energy dissipation steel bar 5), and no new residual deformation is generated. The shape memory alloy bar 6 gradually recovers to the original length before the pre-tension is not applied with the compression of the middle connector 2. The tensile force disappears and withdraws from the stress state, and there is no need to provide additional restoring force to ensure that the larger vertical load transmitted from the upper wall to the component under compression is borne by the foamed aluminum block, avoiding the compression damage of the shape memory alloy bar 6, and the seismic energy is also dissipated by the foamed aluminum block during compression.Embodiment 2

[0065] As shown in FIG. 6 to FIG. 11, the present disclosure provides a fabricated shear wall, including the wall corner component 7 with self-centering energy dissipation, the bottom compressive block 8, the prefabricated wall panel 9, the steel connector 10, the post-cast floor 11, and the foundation 120 described in Embodiment 1. The wall corner component 7 and the bottom compressive block 8 are located at the bottom of the fabricated shear wall, and the wall corner component 7 is arranged on both sides of the bottom compressive block 8 to form a symmetrical stress structure. The wall corner component 7 is fixedly connected to the top of the foundation 120 through the fourth connecting hole 331 of the fourth flange plate 33 of the lower connector 3 through the high-strength bolt, and the bottom compressive block 8 is fixedly connected to the top of the foundation 120 through the bed-mortar. The bottom end of the prefabricated wall panel 9 at the bottom layer passes through its corresponding connection structure through high-strength bolts, and is fixedly connected to the first connecting hole 111 of the first flange plate 11 of the wall corner component 7 and the end plate 82 of the fifth connecting hole 821 of the bottom compressive block 8, respectively. The top of the bottom prefabricated wall panel 9 is fixedly connected to the other prefabricated wall panel 9 through bolts and a steel connector 10 to form a reliable force transmission between the upper and lower wall panels. The post-cast floor 11 is located at the connection of each prefabricated wall panel 9 and is integrated with the steel connector 10 to enhance the integrity of the shear wall and the floor.

[0066] The bottom compressive block 8 includes box 81, end plate 82, outer steel plate 83, opposite tensile steel bar 84, and concrete 94. The end plate 82 is equipped with an elliptical fifth connecting hole 821 connected to the bolt. The box 81 is an open structure. The top of the box 81 is located on the side of the fifth connecting hole 821 and is fixedly connected to the bottom of the end plate 82. The side of the box 81 is connected to the outer steel plate 83, which provides space for construction and later maintenance of high-strength bolts used to connect the bottom compressive block 8 and the prefabricated wall plate 9.

[0067] The outer steel plate 83 is wrapped around the side of the box 81. The bottom of the outer steel plate 83 is fixedly connected to the end plate 82. The outer steel plate 83 is equipped with several evenly distributed tension reinforcement 84. The tension reinforcement 84 is welded to the inner side of the outer steel plate 83, which is used to improve the integrity of the outer steel plate 83 and prevent it from buckling under pressure. The inner cavity of the outer steel plate 83 is poured with concrete 94, and the strength of concrete 94 can be designed to be equal or higher than the strength of concrete 94 of the prefabricated wall panel 9 to ensure the high compressive bearing capacity of the bottom compressive block 8.

[0068] The prefabricated wall panel 9 includes longitudinal reinforcement 91, stirrups 92, bolt sleeve 93, and concrete 94. The longitudinal reinforcement 91 and stirrups 92 are vertically connected to each other to form the reinforcement cage skeleton. The concrete 94 is poured outside the longitudinal reinforcement 91 and stirrups 92, and the reinforcement cage is wrapped to form the main body of the wall panel. The longitudinal reinforcement 91 includes the edge member longitudinal reinforcement 911, the web longitudinal reinforcement 912, and the force transmission longitudinal reinforcement 913. The two ends of the edge member longitudinal reinforcement 911 are connected to the bolt sleeve 93 through the thread. The outer end of the force transmission longitudinal reinforcement 913 is connected to the bolt sleeve 93 through the thread. The force transmission path of the steel bar-bolt sleeve 93-high-strength bolt can be realized through the high-strength bolt, forming a dry connection system of bolt connection, avoiding the problems of long curing time and large field operation of traditional wet connection.

[0069] The steel connector 10 is a rectangular steel tube structure, and the rectangular steel tube has good bending and shear resistance. The upper and lower ends of the contact between the steel connector 10 and the prefabricated wall panel 9 are provided with bolt hole 101, and the bolt hole 101 realizes the connection between the steel connector 10 and the prefabricated wall panel 9 through bolts. The steel connector 10 is generally arranged at the height of the floor of the shear wall structure. The height of the steel connector 10 is consistent with the thickness of the floor, so that the steel connector 10 and the floor form a whole, without taking up additional building space.

[0070] The post-cast floor 11 includes longitudinal reinforcement 91, stirrups 92, and concrete 94. The longitudinal reinforcement 91 and stirrups 92 are vertically connected to each other to form the floor reinforcement skeleton. The concrete 94 is poured on the outside of the longitudinal reinforcement 91 and stirrups 92 to form the floor structure. The post-cast floor 11 can adopt the construction form of precast floor+post-cast concrete layer or integral pouring of floor, which can reduce the workload of on-site formwork support and improve the construction efficiency. Among them, the longitudinal reinforcement 91 of the post-cast floor 11 can penetrate the inner cavity of the steel connector 10 during construction, enhance the integrity of the floor and the wall panel, and improve the lateral displacement resistance of the structure.

[0071] The foundation 120 also includes longitudinal reinforcement 91, stirrups 92, and concrete 94. The longitudinal reinforcement 91 and stirrups 92 are vertically connected to each other to form the foundation reinforcement cage. The concrete 94 is poured outside the longitudinal reinforcement 91 and stirrups 92 to form the foundation body. In the area connected to the self-centering energy dissipation wall corner component 7, the foundation 120 should also be pre-buried with the force-transmitting steel bar of the bolt sleeve 93 at the end. The force-transmitting steel bar is welded and fixed with the foundation 120 steel cage to ensure a reliable connection between the wall corner component 7 with self-centering energy dissipation and the foundation 120, so as to realize the effective transfer of force. For the area in contact with the bottom compressive block 8, a 20 mm deep channel should be set up for the foundation 120 bed-mortar during the installation of the bottom compressive block 8. The bed-mortar can fill the gap between the foundation 120 and the module to ensure uniform force on the contact surface.Embodiment 3

[0072] A construction method for an assembled shear wall described in Example 2 includes the following steps.

[0073] S1, the processing of wall corner components 7 with self-centering energy dissipation, bottom pressure bearing module 8, prefabricated wall panel 9, steel connector 10, and various embedded parts are completed in the factory.

[0074] The assembly and processing of the wall corner component 7 with self-centering energy dissipation is as follows: firstly, the foamed aluminum block 4 is placed in the first limit hole 31 of the lower connector 3, and then the middle connector 2 is placed on the top of the foamed aluminum block 4, so that the top of the foamed aluminum block 4 is offset from the lower side of the middle connector 2, and then the shape memory alloy bar 6 passes through the second connecting hole 211 of the middle connector 2 and the third connecting hole 321 of the lower connector 3, and the nut is fastened to realize the connection between the middle connector 2 and the lower connector 3. Meanwhile, the rated torque is applied to the nut to pre-tension the shape memory alloy bar 6. Then, the first web 12 of the upper connector 1 is placed in the limit slot 23 of the middle connector 2 and offset. The energy dissipation steel bar 5 passes through the second limit hole 121 of the upper connector 1 and the third limit hole 221 of the middle connector 2, and the end of the energy dissipation steel bar 5 is fixed by the nut.

[0075] S2, according to the requirements, the longitudinal reinforcement 91 and the bolt sleeve 93 in the embedded parts are arranged in the foundation formwork, in which the longitudinal reinforcement 91 with the bolt sleeve 93 is welded with the foundation reinforcement cage, and then the concrete 94 required for the foundation 120 is poured and cured to complete the foundation 120 construction.

[0076] S3, the wall corner component 7 with self-centering energy dissipation is installed in the specified area on the top surface of the foundation 120, and the fourth connecting hole 331 of the lower connector 3 fourth flange plate 33 is fixedly connected to the foundation 120 by the bolt through the fourth connecting hole 331 of the fourth flange plate 33 of the lower connector 3; the bottom compressive block 8 is placed in the designated area of the top surface of the foundation 120, and the bed-mortar operation is carried out between the bottom compressive block 8 and the foundation 120. After the bed-mortar reaches the design strength, the bottom prefabricated wall panel 9 is hoisted to the top of the wall corner component 7 and the bottom compressive block 8 with self-centering energy dissipation. The bolt passes through the prefabricated wall panel 9 corresponding to the connection structure and the wall corner component 7. The first connecting hole 111 of the first flange plate 11 and the fifth connecting hole 821 of the end plate 82 of the bottom compressive block 8 are fixed to complete the installation of the bottom layer of the assembled shear wall.

[0077] S4, the steel connector 10 is placed on the top of the bottom prefabricated wall panel 9, and the bolt sleeve 93 of the bottom prefabricated wall panel 9 is connected and fixed through the bolt through the corresponding hole position of the steel connector 10; subsequently, the upper prefabricated wall panel 9 is hoisted above the steel connector 10 and connected to the steel connector 10 by the bolt through the corresponding structure of the upper prefabricated wall panel 9, this step is repeated to complete the installation of each layer of prefabricated wall panel 9 in turn.

[0078] S5, the longitudinal reinforcement 91 and stirrups 92 required for the post-cast floor 11 are arranged between the prefabricated wall panels 9 of each layer. Among them, the longitudinal reinforcement 91 of the post-cast floor 11 penetrates the inner cavity of the steel connector 10, and after the reinforcement binding of the floor is completed, the floor concrete 94 is poured. When the concrete 94 is hardened to reach the design strength, the post-cast floor 11 is completed, and the overall construction of the assembled shear wall is completed.

[0079] Finally, it should be explained that the above embodiments are only used to explain the technical scheme of the present disclosure rather than restrict it. Although the present disclosure is described in detail with reference to the better embodiment, the ordinary technical personnel in this field should understand that they can still modify or replace the technical scheme of the present disclosure, and these modifications or equivalent substitutions cannot make the modified technical scheme out of the spirit and scope of the technical scheme of the present disclosure.

Claims

1. A wall corner component with self-centering energy dissipation, comprising an upper connector, a middle connector, a lower connector and a foamed aluminum block, wherein the upper connector is connected to the middle connector through an energy dissipation steel bar, the energy dissipation steel bar includes first anchoring sections and an energy dissipation section, the first anchoring sections are set at both ends of the energy dissipation section, the first anchoring section is a cylindrical structure with a thread, and the energy dissipation section is an hourglass structure; wherein the middle connector is connected to the lower connector through a shape memory alloy bar, the shape memory alloy bar is dumbbell-shaped, comprising second anchoring sections and a deformation section, the second anchoring sections are set at both ends of the deformation section, and the second anchoring section is provided with a thread connected to a nut; a middle part of the lower connector is provided with a first limit hole, and the foamed aluminum block is set in the first limit hole, a bottom of the foamed aluminum block is connected to a bottom of the lower connector, a top of the foamed aluminum block runs through the first limit hole and attaches a lower side of the middle connector;wherein the upper connector is a T-shaped structure, comprising a first flange plate set horizontally at a top and a first web vertically connected to a lower side of the first flange plate, multiple first connecting holes are provided on the first flange plate, and multiple first connecting holes are evenly distributed on both sides of the first web, multiple second limit holes are provided on the first web, and a middle part of the energy dissipation steel bar is set inside the second limit hole;wherein the middle connector is a U-shaped structure, comprising a second flange plate set horizontally at the bottom and a second web vertically connected to the upper side of the second flange plate, a middle part of the second flange plate is provided with a limit slot, and two sides of the limit slot are connected to the shape memory alloy bar, a second connecting hole is connected to a middle part of the U-shaped structure and attaches the limit slot, a second web is provided with a third limit hole corresponding to the second limit hole, and two ends of the energy dissipation steel bar are connected to nuts through the third limit hole;wherein the lower connector comprises a third flange plate and a fourth flange plate, the third flange plate and the fourth flange plate are arranged in parallel vertically, a middle of the third flange plate is provided with a first limit hole, and the two sides of the first limit hole are provided with third connecting holes connected to the shape memory alloy bar, multiple stiffening plates are set between the third flange plate and the fourth flange plate, multiple fourth connecting holes are set on the fourth flange plate, and the fourth connecting holes are set alternately with the stiffening plates.

2. An assembled shear wall, comprising one or more wall corner components with self-centering energy dissipation according to claim 1, comprising a bottom compressive block, prefabricated wall panels, a steel connector, a post-cast floor and a foundation; wherein the wall corner components and the bottom compressive block are located at a bottom of the assembled shear wall, the wall corner components are set on both sides of the bottom compressive block; a bottom of the wall corner component and the bottom compressive block are fixedly connected to a top of the foundation, a bottom of the bottom prefabricated wall panel is fixedly connected to a top of the wall corner components and the bottom compressive block; a top of the bottom prefabricated wall panel is fixedly connected to a rest of the prefabricated wall panels through bolts and steel connectors, a post-cast floor is located at a connection of each prefabricated wall panel and integrated with steel connector by pouring.

3. The assembled shear wall according to claim 2, wherein the bottom compressive block comprises a box, an end plate, an outer steel plate, a tension steel bar and concrete, the end plate is equipped with an elliptical fifth connecting hole connected to a bolt, a box is an open structure, a top of the box is located on one side of the fifth connecting hole and is fixedly connected to a bottom of the end plate, a side of the box is connected to the outer steel plate, an outer steel plate is wrapped on a circumference of the box, a bottom of the outer steel plate is fixedly connected to the end plate, multiple evenly distributed tension steel bars are arranged in the outer steel plate, and an inner cavity of the outer steel plate is poured with concrete.

4. The assembled shear wall according to claim 2, wherein the prefabricated wall panel comprises a longitudinal reinforcement, stirrups, a bolt sleeve and concrete, the longitudinal reinforcement and stirrups are vertically connected to each other, concrete is poured outside of longitudinal reinforcement and stirrups, the longitudinal reinforcement comprises edge member longitudinal reinforcements, web longitudinal reinforcement and force transmission longitudinal reinforcement, both ends of edge member longitudinal reinforcements are connected to bolt sleeves through threads, and an outer end of force transmission longitudinal reinforcement is connected to bolt sleeves through threads.

5. A construction method for the assembled shear wall according to claim 4, comprising the following steps,S1, assembling a shear wall comprising a wall corner component with self-centering energy dissipation, bottom compressive block, prefabricated wall panels, steel connectors, and one or more embedded parts;S2, arranging the longitudinal reinforcement and bolt sleeve in the embedded parts in a foundation formwork, in which the longitudinal reinforcement with bolt sleeve is welded with a foundation reinforcement cage, and then pouring concrete required for the foundation and maintaining to complete a foundation construction;S3, installing the wall corner component with self-centering energy dissipation in a specified area of a top surface of the foundation, and fixedly connecting to the foundation through the fourth connecting hole of fourth flange plate of the lower connector by bolts; placing the bottom compressive block in the specified area of the top surface of the foundation, and performing a bed-mortar operation between the bottom compressive block and the foundation; after the bed-mortar reaches a design strength, hoisting the prefabricated wall panel of the bottom layer to a top of the wall corner component and the bottom compressive block with self-centering energy dissipation, and fixing to the first connecting hole of the first flange plate of the wall corner component and a fifth connecting hole of the end plate of the bottom compressive block through a corresponding connection structure of the prefabricated wall panel by the bolt to complete an installation of the bottom layer of the assembled shear wall;S4, placing the steel connector on a top of the bottom prefabricated wall panel, connecting and fixing to a bolt sleeve of the bottom prefabricated wall panel by the bolt through a corresponding hole position of the steel connector; subsequently, hoisting an upper prefabricated wall panel above the steel connector, and connecting to the steel connector through a corresponding structure of the upper prefabricated wall panel by the bolt, and repeating the step to complete an installation of each layer of prefabricated wall panel in turn;S5, arranging the longitudinal reinforcement and stirrups required for the post-cast floor between the prefabricated wall panels of each layer, where the longitudinal reinforcement of the post-cast floor penetrates an inner cavity of the steel connector. After the reinforcement of the floor is lashed, pouring the concrete for the floor, when a concrete hardening reaches a design strength, the post-cast floor is completed, and an overall construction of the assembled shear wall is completed.

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