A low prestressed green assembled self-resetting wall

Abstract

The present invention relates to a low-prestressed green prefabricated self-resetting wall, comprising a hinged wall, a hinged column, a steel chute horizontal force transmission key, a low-prestressed demand self-resetting shear device and a concrete base. The hinged wall and the hinged column are fixed on the concrete base, and the low-prestressed demand self-resetting shear device and the steel chute horizontal force transmission key are staggered to connect the bottom hinged wall and the hinged column. The low-prestressed demand self-resetting shear device is arranged between different floors, while the steel chute horizontal force transmission key is arranged at the floor height. Under seismic loads, the lateral force causes the hinged wall and the hinged column to rotate around their respective manifested hinge supports. At this time, the steel chute horizontal force transmission key only controls the rotation coordination of the bottom hinged wall and the hinged column, and the low-prestressed demand self-resetting shear device not only controls the rotation coordination of the bottom hinged wall and the hinged column, but also dissipates the input energy and realizes the self-resetting of the structure.

Description

Technical Field

[0001] The present invention is used for the seismic design of new buildings and the seismic reinforcement of existing buildings. Background Art

[0002] Green prefabricated self-righting walls are a new type of high-performance structural technology, possessing the key attributes of being both environmentally friendly and seismically resistant. Existing self-righting walls can be divided into 1) prefabricated self-righting walls with bottom seams that utilize a flexible rocking mechanism to facilitate component prefabrication, assembly, and minimize wall damage; and 2) prefabricated self-righting walls that utilize self-righting and energy-absorbing devices to resist lateral forces and control residual displacement. Green prefabricated self-righting walls can be divided into prefabricated self-righting walls with bottom seams and prefabricated self-righting walls with bottom hinges. Both prefabricated self-righting walls can achieve rigid-body-like rotation under horizontal loads, offer a clear assembly concept, and significantly reduce wall damage compared to conventional shear walls.

[0003] However, existing green prefabricated self-resetting walls face key bottlenecks in terms of green full assembly, reset mechanism, and swing mechanism, which significantly reduce their green environmental protection and seismic resilience. In terms of green full assembly, the assembly process of the bottom-seam prefabricated self-resetting wall still requires on-site processes such as post-tensioning prestressed tendon anchor end grouting wet connection and actuator prestressing. The bottom-hinged prefabricated self-resetting wall requires replacement of the entire self-resetting and energy-dissipating devices after an earthquake. In terms of reset mechanism, both types of green prefabricated self-resetting walls rely on high-level prestressed reset, which increases the difficulty of component assembly and reduces the wall's deformation capacity. Long-term problems are difficult to resolve, easily causing local damage and reducing the wall's seismic reliability. The bottom-hinged swing mechanism is severely affected by the second-order effect of gravity, resulting in weak anti-collapse ability. Once a device is damaged, the lateral resistance will rapidly decrease. Summary of the Invention

[0004] To address the above-mentioned shortcomings of existing prefabricated self-resetting walls, the present invention proposes a low-prestress, green prefabricated self-resetting wall. This solves the problem of self-resetting walls requiring high levels of prestress, avoids the disadvantage of prefabricated self-resetting walls experiencing localized damage due to lifting and collision at corners under earthquake loads, which reduces the wall's subsequent seismic redundancy. Furthermore, damaged energy-consuming components are easily replaced, allowing for rapid post-earthquake restoration. This prefabricated structure can be industrially produced in a factory and quickly installed at the construction site, resulting in a low cost and energy-saving and environmentally friendly solution.

[0005] In order to achieve the above objectives, the present invention provides the following technical solutions:

[0006] A low prestressed green assembled self-resetting wall is characterized by comprising a hinged wall (1), a hinged support (2), a steel chute horizontal force transmission key (3), a low prestressed demand self-resetting shearing device (4), and a concrete base (5), wherein:

[0007] Hinge pillars (2) are arranged on both sides of the hinged wall (1), and steel slideway horizontal force transmission keys (3) and low prestressed demand self-resetting shearing devices (4) are arranged alternately between the hinged wall (1) and the hinged pillars (2);

[0008] The hinged wall (1) and the hinged support (2) are hingedly connected to the concrete base (5) at the bottom;

[0009] Under earthquake load, the action of lateral force allows the hinged wall (1) and the hinged column (2) to rotate at the same angle through the steel chute horizontal force transmission key (3) and the low prestress demand self-resetting shear device (4); the steel chute horizontal force transmission key (3) and the low prestress demand self-resetting shear device (4) jointly control the rotation coordination of the hinged wall (1) and the hinged column (2), and the low prestress demand self-resetting shear device (4) dissipates the energy input to the structure and reduces the residual displacement of the structure after the earthquake through the self-resetting of the device.

[0010] The present invention provides a low-prestressed green prefabricated self-resetting wall. The wall consists of a hinged wall, a hinged column, a steel chute horizontal force transmission key, a low-prestressed demand self-resetting shearing device and a concrete base. The hinged wall and the hinged column are fixed on the concrete base, and the low-prestressed demand self-resetting shearing device and the steel chute horizontal force transmission key are staggered to connect the bottom hinged wall and the hinged column. Under seismic loads, the lateral force causes the hinged wall and the hinged column to rotate around their respective manifested hinge supports. At this time, the steel chute horizontal force transmission key only controls the rotation coordination of the bottom hinged wall and the hinged column, and the low-prestressed demand self-resetting shearing device not only controls the rotation coordination of the bottom hinged wall and the hinged column, but also dissipates the energy of the input component and realizes the self-resetting of the structure. The present invention offers low construction difficulty and does not require the post-tensioning of the entire wall with a large amount of prestress to achieve self-reset. This avoids the loss of prestress caused by the prolonged application of high levels of prestress to prefabricated self-reset walls, which can lead to unstable seismic performance. It also avoids the problem of prefabricated self-reset walls lifting and colliding under seismic loads, and the resulting local damage, which can reduce subsequent seismic redundancy. The present invention can effectively control the inter-story displacement angles of each floor of the structure to be the same under seismic loads, avoiding a significant decrease in the overall seismic performance of the structure due to excessive lateral displacement of a single floor. It can also effectively reduce the residual displacement response of the structure after an earthquake, shortening the time it takes to repair the structure after an earthquake. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The overall structure of the low prestressed green assembled self-resetting wall of the present invention and its deformation mode under earthquake load;

[0012] Figure 2 This is a structural diagram of a hinged wall;

[0013] Figure 3 This is a structural diagram of the hinged support;

[0014] Figure 4 This is the structural diagram of the horizontal force transmission key of the steel slide;

[0015] Figure 5 This is the exploded structural diagram of the horizontal force transmission key of the steel slide;

[0016] Figure 6 This is a structural diagram of a self-resetting shear device with low prestress requirement;

[0017] Figure 7 It is a cross-sectional view of a self-resetting shear device with low prestressing requirement.

[0018] Figure 8 This is a structural diagram of the bracket and the connecting parts of the transmission mechanism of the low prestress demand self-resetting shear device;

[0019] Figure 9 This is a cross-sectional view of the bracket and the connecting parts of the transmission mechanism of the self-resetting shear device with low prestress requirement;

[0020] Figure 10 This is a structural diagram of the upper connection component of the self-resetting shear device with low prestressing requirements;

[0021] Figure 11 This is a cross-sectional view of the upper connection component of the self-resetting shear device with low prestressing requirements;

[0022] Figure 12 Structural diagram of the left and right end connecting components of the self-resetting shear device with low prestressing requirements;

[0023] Figure 13 This is a structural diagram of the lower end connection component of the self-resetting shear device with low prestressing requirements;

[0024] Figure 14 Schematic diagram of the disc spring assembly connected to the disc spring baffle of the self-resetting shear device with low prestressing requirements;

[0025] Figure 15 Schematic diagram of the energy-dissipating steel rod of the self-resetting shear device with low prestressing requirements;

[0026] Figure 16 A schematic diagram showing the structure and state comparison of a self-locking clamp of an embodiment of a self-resetting shearing device with low prestress requirements;

[0027] Figure 17 Schematic diagram of the deconstruction of the self-resetting shear device with low prestressing requirements;

[0028] Figure 18 It is the deformation and energy consumption mechanism of the self-resetting shear device with low prestress demand.

[0029] Reference numerals:

[0030] Hinge wall (1), wall part (1-1), prestressed tendons (1-2), bottom visible hinge support (1-3);

[0031] Hinge support (2), column body (2-1), column foot manifesting hinge support (2-2);

[0032] Steel slide horizontal force transmission key (3), rod (3-1), left component (3-2), right component (3-3);

[0033] Low prestressing demand self-resetting shear device (4),

[0034] Energy-absorbing steel rod (4-1), core energy-absorbing section (4-1-1), connecting section (4-1-2),

[0035] Self-locking clamp (4-2), anchor ring (4-2-1), clip (4-2-2), O-type rubber ring (4-2-3), return spring (4-2-4), cover assembly (4-2-5),

[0036] High-strength steel rod (4-3), prestressed screw (4-4), disc spring assembly (4-5), disc spring baffle (4-6),

[0037] Upper connecting part (4-7), top connecting plate (4-7-1), upper cavity (4-7-2), lower cavity (4-7-3), middle plate (4-7-4);

[0038] Left end connecting component (4-8), first cylinder (4-8-1), first wing (4-8-2), first connecting plate (4-8-3);

[0039] Right end connecting component (4-9), second cylinder (4-9-1), second wing (4-9-2), second connecting plate (4-9-3);

[0040] Intermediate connecting member (4-10);

[0041] Lower end connecting component (4-11), cylindrical rod (4-11-1), bottom connecting plate (4-11-2)

[0042] Concrete base (5). DETAILED DESCRIPTION

[0043] The technical solution of the present invention is further described below with reference to the accompanying drawings.

[0044] Figure 1As shown, a low prestressed green assembled self-resetting wall comprises a hinged wall (1), a hinged support column (2), a steel chute horizontal force transmission key (3), a low prestressed demand self-resetting shearing device (4) and a concrete base (5). The steel chute horizontal force transmission key (3) and the low prestressed demand self-resetting shearing device (4) are arranged alternately between the hinged wall (1) and the hinged support column (2), and the bottoms of the hinged wall (1) and the hinged support column (2) are fixed on the concrete base (5).

[0045] Figure 2 As shown, the hinged wall portion (1) includes a wall portion (1-1), prestressed tendons (1-2), and a bottom manifest hinge support (1-3): the wall portion (1-1) is the main body, the prestressed tendons (1-2) are tensioned inside the wall portion (1-1), the bottom manifest hinge support (1-3) is set on a concrete base (5), the wall portion (1-1) is connected to the bottom manifest hinge support (1-3) through steel sections, the bottom manifest hinge support (1-3) has a small stiffness, and under the action of lateral force, the wall portion (1-1) will rotate around its bottom manifest hinge support (1-3).

[0046] Figure 3 As shown, the hinge pillar (2) includes a column part (2-1) and a column foot manifest hinge support (2-2): the column part (2-1) is the main body, the column foot manifest hinge support (2-2) is set on the concrete base (5), the column part (2-1) is connected to the column foot manifest hinge support (2-2), the column foot manifest hinge support (2-2) has a small rigidity, and under the action of lateral force, the column part (2-2) rotates around its column foot manifest hinge support (2-2).

[0047] Furthermore, the hinged wall (1) and the hinged support (2) have the same height H. Under the action of lateral force, the hinged wall (1) and the hinged support (2) rotate around their respective bottom hinge supports at an angle of , the wall top displacement of the present invention is .

[0048] Figure 4 、 Figure 5 As shown, the horizontal force transmission key (3) includes a rod (3-1), a left part (3-2), and a right part (3-3), wherein: the rod (3-1) is realized by a screw and a nut, the left part (3-2) is designed in a T-shape, and the right part (3-3) is designed in a π-shape, the tongue of the T-shaped left part (3-2) is longitudinally provided with a long slot, and the two tongues of the π-shaped right part (3-3) are respectively provided with round holes; the rod (3-1) passes through the first round hole of the right part (3-3), the long slot of the left part (3-2), and the second round hole of the right part (3-3) in sequence through the screw, and is tightened and fixed with a nut at the other end;

[0049] The horizontal force transmission key (3) is fixed between the hinged wall (1) and the hinged support column (2) through its left part (3-2) and right part (3-3);

[0050] In practical applications, the positional relationship between the left component (3-2) and the right component (3-3) can be exchanged;

[0051] Under earthquake load, the lateral force causes the hinged wall (1) and the hinged support (2) to rotate around their respective bottom visible hinged supports, and the left component (3-2) and the right component (3-3) connecting the two are shear dislocated. At this time, the rod (3-1) (3-1) slides freely in the vertical direction in the long groove of the left component (3-2), only transmitting horizontal force, controlling the rotation coordination of the hinged wall (1) and the hinged support (2), and ensuring that the hinged wall (1) and the hinged support (2) have no out-of-plane offset.

[0052] The following Figures 6-17 Detailed introduction to low prestressing demand self-resetting shear device (4):

[0053] The low prestressing requirement self-resetting shearing device (4) is composed of a self-resetting prestressing system, an energy dissipation system, and a bracket and a transmission mechanism for installing the self-resetting prestressing system and the energy dissipation system. The three form an integrated body, which is connected to the outside through the bracket and the transmission mechanism to introduce energy; when the hinged wall (1) and the hinge pillar (2) rotate around their respective manifested hinge supports under earthquake loads, the device undergoes shear deformation (loading), and the energy dissipation system therein undergoes tensile yield deformation. At the same time, the prestressed screw in the self-resetting prestressing system undergoes tensile elastic deformation, and the disc spring group undergoes compressive elastic deformation. The device completes the reset through the restoring force generated by the deformation of the self-resetting prestressing system during the shear deformation (loading) process.

[0054] The bracket and transmission mechanism include an upper connecting component (4-7), a left connecting component (4-8), a right connecting component (4-9), an intermediate connecting component (4-10) and a lower connecting component (4-11): wherein the upper connecting component (4-7), the intermediate connecting component (4-10) and the lower connecting component (4-11) constitute a bracket for installing the self-resetting prestressed system and the energy dissipation system; wherein the two end surfaces of the upper connecting component (4-7) and the lower connecting component (4-11) determine the initial length L before the shear energy dissipation device is separated in the length direction;

[0055] The left end connecting component (4-8) and the right end connecting component (4-9) form a movable nested structure, which is located between the upper end connecting component (4-7) and the middle connecting component (4-10), and is connected to the hinged wall (1) and the bottom hinged column part (2) through the wings, and is used to input the shear dislocation and energy generated when the hinged wall (1) and the bottom hinged column part (2) rotate around their respective manifested hinge supports under the action of lateral force;

[0056] The movable shaft of the movable nesting structure is arranged in the cavity of the upper connecting part (4-7), and the two wings extend from the side wall of the cavity. The upper and lower ends of the movable shaft are in rigid contact with the upper connecting part (4-7) and the lower connecting part (4-11) respectively. After input shear dislocation, the movable nesting structure slides axially relative to each other, thereby pushing the upper connecting part (4-7) and the lower connecting part (4-11) to separate relatively.

[0057] Specifically, the upper end connecting component (4-7) has a main body that is a hollow cylinder, which is divided into two upper and lower open cavities by an intermediate plate (4-7-4), wherein a top connecting plate (4-7-1) is fixed at the top opening of the upper cavity (4-7-2), and the lower cavity (4-7-3) has an open bottom and side walls that are symmetrically grooved along the central axis of the cavity;

[0058] The lower end connecting component (4-11) comprises a cylindrical rod (4-11-1) and a bottom connecting plate (4-11-2) fixed to the bottom of the cylindrical rod (4-11-1);

[0059] The middle connecting component (4-10) is provided with an opening in the center thereof for the lower cavity (4-7-3) of the upper connecting component (4-7) to pass through;

[0060] The movable nested structure includes a left end connecting component (4-8) and a right end connecting component (4-9), and takes the insertion of the right end connecting component (4-9) into the left end connecting component (4-8) as an example;

[0061] The left end connecting component (4-8) comprises a first cylinder (4-8-1) with a slotted side wall, a first wing (4-8-2) and a first connecting plate (4-8-3), the first connecting plate (4-8-3) being connected to the wall (1-1) of the hinged wall (1) or the column (2-1) of the hinged support (2) by bolts, the first wing (4-8-2) being fixed to the outer wall of the first cylinder (4-8-1), and the side wall of the first cylinder (4-8-1) being provided with a slot;

[0062] The right end connecting component (4-9) comprises a second cylinder (4-9-1), a second wing (4-9-2) and a second connecting plate (4-9-3); the second connecting plate (4-9-3) is connected to the wall (1-1) of the hinged wall (1) or the column (2-1) of the hinge support (2) by bolts; and the second wing (4-9-2) is fixed to the outer wall of the second cylinder (4-9-1);

[0063] The first cylinder (4-8-1) and the second cylinder (4-9-1) are at the same height;

[0064] The second cylinder (4-9-1) is placed inside the first cylinder (4-8-1) to form a movable shaft body of a movable nested structure, and the second wing portion (4-9-2) extends from a groove on the side wall of the first cylinder (4-8-1), thereby forming a pair of wings of the movable nested structure together with the first wing portion (4-8-2) on the other side of the movable shaft body;

[0065] Conversely, the positions of the left and right end connecting parts are interchanged, and vice versa.

[0066] In the axial direction, i.e., the length direction, the movable nesting structure is placed in the lower cavity (4-7-3) of the upper connecting part (4-7), and the first wing (4-8-2) and the second wing (4-9-2) extend from the slots on both sides of the lower cavity (4-7-3) for connection to the outside; the top of the movable shaft body of the movable nesting structure is in rigid contact with the middle plate (4-7-4) of the upper connecting part (4-7), and the bottom of the movable shaft body is placed on the top of the cylindrical rod (4-11-1) of the lower connecting part (4-11) and in rigid contact; the movable shaft body and the cylindrical rod (4-11-1) overlapped with each other are inserted together and confined in the lower cavity (4-7-3); under the input of external energy, the movable nesting structure slides against each other in the axial direction to promote the relative displacement of the upper connecting part (4-7) and the lower connecting part (4-11).

[0067] Furthermore, the width W of the first wing (4-8-2) 4-8,2 It must be smaller than the slot width W of the lower cavity (4-7-3) of the upper connecting part (4-7) 4-7 , the width W of the second wing (4-9-2) 4-9 It must also be smaller than the slot width W of the first cylinder (4-8-1) of the left end connecting component (4-8) 4-8,1 The slot width W of the lower cavity (4-7-3) of the upper connecting part (4-7) is 4-7 To ensure that the left end connecting component (4-8) and the right end connecting component (4-9) can shift relative to each other in the lower cavity (4-7-3).

[0068] Furthermore, the height H of the cylindrical rod (4-11-1) 4-11 The height H of the movable shaft 4-8 The sum of the heights H should be slightly greater than the height H of the lower cavity (4-7-3) of the upper connecting part. 4-7 In order to ensure that the cylindrical rod (4-11-1) is always in the lower cavity (4-7-3) of the upper end connecting part (4-7) during operation, the height H of the movable shaft is twice as high as 4-8 Need to be smaller than the height H of the lower cavity (4-7-3) 4-7 , satisfying the following relationship: .

[0069] The energy dissipation system includes two or more energy dissipation steel bars (4-1);

[0070] The upper and lower ends of the energy-absorbing steel rod (4-1) are respectively fixed on the top connecting plate (4-7-1) of the upper end connecting component (4-7) and the middle connecting component (4-10).

[0071] During use, the energy-consuming steel rod (4-1) is a consumable item and can be replaced.

[0072] Specifically, if Figure 15 As shown, the energy-absorbing steel rod (4-1) is divided into three sections, the middle section is the core energy-absorbing section (4-1-1), and the upper and lower sections are the connecting sections (4-1-2). The core energy-absorbing section (4-1-1) will yield and dissipate energy when subjected to tension, while the connecting section (4-1-2) has a larger diameter to ensure that it will not yield during loading.

[0073] Furthermore, as an embodiment, the connecting section (4-1-2) of the energy-absorbing steel rod (4-1) is engraved with threads, and the upper and lower ends of the energy-absorbing steel rod (4-1) can be fixed to the top connecting plate (4-7-1) of the upper end connecting component and the middle connecting component (4-10) respectively by nuts.

[0074] The self-resetting prestressing system includes a prestressing system and a self-resetting system, which are installed on the bracket and the transmission mechanism:

[0075] Among them, Figure 6 、 Figure 14 As shown, the prestressed system includes a prestressed screw (4-4), a disc spring baffle (4-6) and a disc spring group (4-5), wherein the disc spring baffle (4-6) is arranged at the top of the disc spring group (4-5); the disc spring group (4-5) is composed of a plurality of disc springs connected in parallel, and the disc spring group (4-5) and the disc spring baffle (4-6) are arranged in the upper cavity (4-7-2) of the upper connecting component; the top connecting plate (4-7-1) of the upper end connecting component (4-7) and the right end connecting plate (4-7-1) of the upper end connecting component (4-7) are connected to the disc spring group (4-5) and the right end connecting plate (4-7-1) of the upper end connecting component (4-7) are connected to the disc spring group (4-5) and the disc spring baffle (4-6) are arranged in the upper cavity (4-7-2) of the upper end connecting component (4-7) Through holes are reserved in the center of the second cylinder (4-9-1) of the connecting component (4-9), the cylindrical rod (4-11-1) of the lower connecting component (4-11), and the bottom connecting plate (4-11-2) of the lower connecting component (4-11). The upper end of the prestressed screw (4-4) is fixed to the disc spring baffle (4-6), passes through the disc spring group (4-5) and the through holes of each connecting component in sequence, and then passes through the bottom connecting plate (4-11-2) of the lower connecting component (4-11);

[0076] Furthermore, as an embodiment, the prestressed screw rod (4-4) can be fixed to the top disc spring baffle (4-6) and the bottom connecting plate (4-11-2) of the lower end connecting component (4-11) by bolts respectively.

[0077] The self-resetting system comprises a self-locking clamp (4-2) and a high-strength steel rod (4-3); the self-locking clamp (4-2) is fixed on the middle connecting component (4-11), and the high-strength steel rod (4-3) is arranged between the middle connecting component (4-11) and the lower end connecting component (4-11). Figure 6 As shown; specifically, the upper end of the high-strength steel rod (4-3) is connected to the self-locking clamp (4-2), and the lower end of the high-strength steel rod (4-3) is fixed to the bottom connecting plate (4-11-2) of the lower end connecting component (4-11), together forming a one-way force transmission element.

[0078] Furthermore, as an embodiment, the self-locking clamp (4-2) can be fixed on the middle connecting component (4-11); the high-strength steel rod (4-3) can be fixed to the bottom connecting plate (4-11-2) of the lower connecting component (4-11) through a nut.

[0079] Specifically, if Figure 16 As shown, in the embodiment, the self-locking clamp (4-2) in the self-resetting system includes an anchor ring (4-2-1), a clamp (4-2-2), an O-type rubber ring (4-2-3), a reset spring (4-2-4) and a gland assembly (4-2-5), wherein:

[0080] The clips (4-2-2) are multiple pieces, built into the anchor ring (4-2-1) and enclosed outside the high-strength steel rod (4-3). A groove is reserved at the end thereof and an O-type rubber ring (4-2-3) is provided, so that the clips can work stably in the gap cavity between the anchor ring (4-2-1) and the high-strength steel rod (4-3).

[0081] The return spring (4-2-4) is arranged on the upper part of the clamp (4-2-2), and the high-strength steel rod (4-3) passes through the return spring (4-2-4);

[0082] The gland assembly (4-2-5) is arranged on the upper part of the anchor ring (4-2-1) and is used to support the return spring (4-2-4) to ensure axial stability during operation;

[0083] The above design enables the self-locking clamp (4-2) to bear the force by engaging the multiple enclosed clamping pieces (4-2-2) with the high-strength steel rod (4-3) when under tension; and when under compression, the clamping pieces (4-2-2) and the high-strength steel rod (4-3) are loosened, and relative sliding occurs between the clamping pieces (4-2-2) and the high-strength steel rod (4-3) without bearing the force.

[0084] In the embodiment, the self-locking clamp structure and working principle are as follows Figure 16 The device of the invention is in the energy consumption stage, such as Figure 16(a) shows the state of the high-strength steel rod anchoring (load-bearing): the clip (4-2-2) will bite the high-strength steel rod (4-3) and bear the load, thereby stretching the energy-dissipating steel rod (4-1) to dissipate energy; and in the reset stage, as shown in Figure 16 (b) shows the sliding (non-load-bearing) state of the high-strength steel bar:

[0085] The clamp (4-2-2) no longer bites the high-strength steel rod (4-3), the clamp reset spring (4-2-4) is compressed, the high-strength steel rod (4-3) and the clamp (4-2-2) no longer bear force, and the self-locking clamp (4-2) and the middle connecting component (4-10) slide toward the lower end connecting component (4-11), thereby preventing the energy-consuming steel rod (4-1) in a stretched state during the energy-consuming stage from being compressed.

[0086] comparison Figure 1 The figure shows the working state changes (initial state, loading state, reset state) of the integral shear wall and the horizontal force transmission key (3) of the present invention, and the corresponding comparison Figure 18 , which shows the working state changes (initial state, loading state, reset state) of the low prestress demand self-resetting shear device (4);

[0087] The details are as follows:

[0088] 1) The overall shear wall is in the initial static state, such as Figure 1 (a), No external force input.

[0089] Among them, the initial state of the shear device (4) is as follows Figure 18 (a): The top of the movable shaft of the movable nested structure composed of the left end connecting part (4-8) and the right end connecting part (4-9) is close to the middle plate (4-7-4) of the upper end connecting part (4-7); the disc spring group (4-5) is in a slightly compressed state in this initial state due to the need for prestressing; the energy-absorbing steel rod (4-1) is stationary on the device; the self-locking clamp (4-2) bites the high-strength steel rod (4-3).

[0090] At this time, the distance between the upper connecting part (4-7) and the lower connecting part (4-11) is , wherein: the distance between the upper connecting part (4-7) and the middle connecting part (4-10) is L 1. The distance between the middle connecting part (4-10) and the lower connecting part (4-11) is L 2.

[0091] Among them, the initial static state of the horizontal force transmission key (3) is as follows: Figure 1 (a) There is no external force input. At this time, the screw of the rod (3-1) is stable in the middle position of the long slide groove of the left component (3-2).

[0092] 2) Shear deformation occurs due to external lateral force input loading:

[0093] The state of the overall shear wall is as follows Figure 1 (b) (i.e. loaded state), the hinged wall (1) and the hinged support (2) rotate around their respective bottom hinged supports at an angle of .

[0094] Among them, the state of the shear device (4) is as follows Figure 18 (b) (i.e. loading state):

[0095] The left end connecting part (4-8) and the right end connecting part (4-9) of the bracket and the transmission mechanism are mutually displaced due to the rotation of the hinged wall (1) and the hinged support (2), pushing the upper end connecting part (4-7) and the lower end connecting part (4-11) to undergo axial relative displacement. At this time, the disc spring group (4-5) in the prestressed system is continuously compressed and stores energy in the upper cavity (4-7-2); at the same time, the high-strength steel rod (4-3) in the self-resetting system is engaged with the self-locking clamp (4-2) (clamping state) to exert a self-locking function; at the same time, the energy-absorbing steel rod (4-1) outside the upper cavity (4-7-2) enters the energy-absorbing mechanism, and the energy-absorbing material is stretched and deformed. , energy dissipation under tensile yield;

[0096] The self-locking clamp (4-2) continuously engages the high-strength steel rod (4-3), that is, the high-strength steel rod (4-3) moves along with the lower end connecting component (4-11) (displaced in a direction away from the upper end connecting component (4-7)).

[0097] During this period, the distance between the middle connecting part (4-10) and the lower connecting part (4-11) remains unchanged. L 2. At this time, the distance between the upper connecting part (4-7) and the middle connecting part (4-10) increases to At the same time, the left part (3-2) and the right part (3-3) of the steel slide horizontal force transmission key (3) are dislocated, and the relative displacement of the dislocation is .

[0098] Among them, the loading state of the horizontal force transmission key (3) is as follows: Figure 1 (b) Due to the input of external force, the hinged wall (1) and the hinged support (2) rotate and shift relative to each other. At this time, the left component (3-2) and the right component (3-3) shift relative to each other, and the relative displacement of the shift is .

[0099] 3) Due to unloading of external lateral force, it reaches the fully reset state:

[0100] The hinged wall (1) and the hinged support (2) of the integral shear wall rotate around their respective bottom hinged supports at a reduced angle. The state of the integral shear wall after unloading is as follows: Figure 1 (c) shown.

[0101] Among them, the state of the shear device (4) is as follows Figure 18 (c):

[0102] The displacement of the left-end connecting component (4-8) and the right-end connecting component (4-9) enters a decreasing trend. At this time, the prestressed system composed of the prestressed screw (4-4) and the disc spring group (4-5) in series will undergo a reset action due to compression; along with the reset process of the prestressed system, the high-strength steel rod (4-3) and the self-locking clamp (4-2) in the self-reset system play an unlocking function and can slide relative to each other. The high-strength steel rod (4-3) extends out of the self-locking clamp (4-2). Since friction resistance is avoided during the sliding reset, a small amount of prestress can achieve the reset goal.

[0103] At this time, the left end connecting part (4-8), the right end connecting part (4-9) and the disc spring group (4-5) of the shearing device are restored to the initial state, and the distance between the upper end connecting part (4-7) and the lower end connecting part (4-11) is restored to the initial state. , while the distance between the upper connecting part (4-7) and the middle connecting part (4-10) is kept at , the distance between the middle connecting parts (4-10) and the lower end connecting parts (4-11) is reduced to .

[0104] Among them, the horizontal force transmission key (3) returns to the initial static state after being completely reset. Figure 1 (c) At this time, the screw of the rod (3-1) is stabilized in the middle position of the long sliding groove of the left component (3-2).

[0105] When in use, the low prestress demand self-resetting shear device has three states: state one (initial state), state two (loaded state), and state three (reset state). Correspondingly, the reset spring of the self-locking clamp is in different degrees of compression: maintaining engagement (force transmission) to maintain and ensure stiffness; and being able to adapt to the transition from state one to state two, that is, the high-strength steel rod moves with the lower end connection component (displacement away from the upper end connection component 1).

[0106] Specifically:

[0107] State 1 (initial state): The return spring is in a compressed state, exerting pressure on the clip; at this time, the clip squeezes the wedge-shaped inner wall of the anchor ring and bites the high-strength steel rod.

[0108] State 2 (loaded state): The return spring is in a compressed state, exerting the same degree of pressure on the clip; the high-strength steel rod tends to move downward, and the friction between the clip and the clip causes the clip to squeeze the wedge-shaped inner wall of the anchor ring more severely than in state 1, causing the clip to continue to bite the high-strength steel rod.

[0109] State 3 (reset state): the reset spring is still in the compressed state (the degree of compression is slightly increased); the high-strength steel rod tends to move upward. At this time, the friction between the clip and the clip makes the clip less squeeze the wedge-shaped inner wall of the anchor ring than in state 1, or even no squeeze at all, causing the clip to no longer bite the high-strength steel rod. Figure 16 shown.

[0110] The function of the return spring is to prevent the high-strength steel rod from moving upward and driving the clip to move upward together.

[0111] In order to achieve the self-resetting characteristic, the initial prestress of the present invention is applied to the low prestress requirement self-resetting shear device, and the sum of the initial prestresses applied to the low prestress requirement self-resetting device only needs to be 2-3% of the yield strength of the self-resetting shear wall.

[0112] Note: In this field, the so-called high-level prestressing refers to the initial prestressing that needs to be applied to the self-righting shear wall, which is about 50% of its yield strength.

[0113] Therefore, the present invention proposes a low-prestress, green, prefabricated, self-resetting wall. This solves the problem of self-resetting walls requiring high levels of prestress. It also avoids the disadvantage of prefabricated self-resetting walls experiencing localized damage due to lifting and collision at corners under earthquake loads, which reduces the wall's subsequent seismic redundancy. Furthermore, damaged components are easily replaced, allowing for rapid post-earthquake restoration. This prefabricated structure can be industrially produced in a factory and quickly installed on-site, resulting in a low cost and energy-saving and environmentally friendly solution.

[0114] The advantages of the present invention are:

[0115] (1) The construction difficulty is relatively low, and there is no need to post-tension the wall with a large amount of prestress to achieve self-reset;

[0116] (2) It avoids the loss of prestress caused by the long-term application of high-level prestress in prefabricated self-resetting walls, which leads to unstable seismic performance;

[0117] (3) Avoid the problem of prefabricated self-centering walls lifting and colliding under earthquake loads, and the resulting local damage, which may lead to a reduction in subsequent seismic redundancy;

[0118] (4) The walls and columns are connected to each floor of the building, which can effectively control the inter-story displacement angle of each floor under seismic loads to be the same, avoiding the overall seismic performance of the structure being reduced due to excessive lateral displacement of a certain floor;

[0119] (5) After the earthquake, the structural repair can be completed by replacing the energy-consuming components in the low-prestressed green prefabricated self-resetting wall, which reduces the cost of structural repair and shortens the repair time.

[0120] The above are typical examples of the present invention, and the implementation of the present invention is not limited to them.

[0121] The present invention has low construction difficulty and does not require a large amount of prestress to be applied to the entire wall to achieve self-reset. This avoids the loss of prestress caused by the long-term application of high-level prestress to the prefabricated self-reset wall, which leads to unstable seismic performance. It also avoids the problem of the prefabricated self-reset wall lifting and colliding under seismic loads, and the resulting local damage, which leads to a subsequent reduction in seismic redundancy. The walls and columns of the present invention are connected to each floor of the building, which can effectively control the structure to have the same inter-story displacement angle on each floor under seismic loads, avoiding a significant decrease in the overall seismic performance of the structure due to excessive lateral displacement of a certain floor. At the same time, it can effectively reduce the residual displacement response of the structure after an earthquake, shortening the time it takes to repair the structure after an earthquake.

Claims

1. A low prestressed green prefabricated self-resetting wall, characterized by: It comprises a hinged wall (1), a hinged support (2), a steel chute horizontal force transmission key (3), a low prestressed demand self-resetting shearing device (4), and a concrete base (5), wherein: Hinge pillars (2) are arranged on both sides of the hinged wall (1), and steel slideway horizontal force transmission keys (3) and low prestressed demand self-resetting shearing devices (4) are arranged alternately between the hinged wall (1) and the hinged pillars (2); The hinged wall (1) and hinged support pillar (2) are hinged on the concrete base (5) at the bottom; Under earthquake load, the action of lateral force allows the hinged wall (1) and the hinged column (2) to rotate at the same angle through the steel chute horizontal force transmission key (3) and the low prestress demand self-resetting shear device (4); the steel chute horizontal force transmission key (3) and the low prestress demand self-resetting shear device (4) jointly control the rotation coordination of the hinged wall (1) and the hinged column (2), and the low prestress demand self-resetting shear device (4) dissipates the energy input to the structure and reduces the residual displacement of the structure after the earthquake through the self-resetting of the device; The low prestressing requirement self-resetting shearing device (4) is composed of a self-resetting prestressing system, an energy dissipation system, and a bracket and a transmission mechanism for installing the self-resetting prestressing system and the energy dissipation system; the three form an integrated body, and are connected to the outside to introduce energy through the bracket and the transmission mechanism; when the hinged wall (1) and the hinged support (2) rotate around their respective manifested hinge supports under earthquake loads, the device undergoes shear deformation, and the energy dissipation system therein undergoes tensile yield deformation, while the prestressed screw in the self-resetting prestressing system undergoes tensile elastic deformation and the disc spring group undergoes compressive elastic deformation, and reset is completed by the restoring force generated by the deformation of the self-resetting prestressing system during the shear deformation process; The bracket and transmission mechanism include an upper connecting component (4-7), a left connecting component (4-8), a right connecting component (4-9), an intermediate connecting component (4-10) and a lower connecting component (4-11): wherein the upper connecting component (4-7), the intermediate connecting component (4-10) and the lower connecting component (4-11) constitute a bracket for installing the self-resetting prestressed system and the energy dissipation system; wherein the two end surfaces of the upper connecting component (4-7) and the lower connecting component (4-11) determine the initial length L before the shear energy dissipation device is separated in the length direction; The left end connecting component (4-8) and the right end connecting component (4-9) form a movable nested structure, which is located between the upper end connecting component (4-7) and the middle connecting component (4-10), and is connected to the hinged wall (1) and the bottom hinged support (2) through the wings, and is used to input the shear dislocation and energy generated when the hinged wall (1) and the bottom hinged support (2) rotate around their respective manifested hinge supports under the action of lateral force; The movable shaft of the movable nesting structure is arranged in the cavity of the upper connecting part (4-7), and the two wings extend from the side wall of the cavity. The upper and lower ends of the movable shaft are in rigid contact with the upper connecting part (4-7) and the lower connecting part (4-11) respectively. After input shear dislocation, the movable nesting structure slides axially relative to each other, thereby pushing the upper connecting part (4-7) and the lower connecting part (4-11) to separate relatively.

2. The low prestressed green prefabricated self-resetting wall according to claim 1 is characterized in that: The hinged wall (1) comprises a wall portion (1-1), prestressed tendons (1-2), and a bottom manifest hinge support (1-3): the wall portion (1-1) is the main body, the prestressed tendons (1-2) are tensioned inside the wall portion (1-1), the bottom manifest hinge support (1-3) is arranged on a concrete base (5), the wall portion (1-1) is connected to the bottom manifest hinge support (1-3) through a steel section, the bottom manifest hinge support (1-3) has a small rigidity, and under the action of a lateral force, the wall portion (1-1) will rotate around its bottom manifest hinge support (1-3).

3. The low prestressed green prefabricated self-resetting wall according to claim 1 is characterized in that: The hinge pillar (2) comprises a column part (2-1) and a column foot manifest hinge support (2-2): the column part (2-1) is the main body, the column foot manifest hinge support (2-2) is arranged on a concrete base (5), the column part (2-1) is connected to the column foot manifest hinge support (2-2), the column foot manifest hinge support (2-2) has a small rigidity, and under the action of lateral force, the column part (2-1) rotates around its column foot manifest hinge support (2-2).

4. The low prestressed green prefabricated self-resetting wall according to claim 1 is characterized in that: The horizontal force transmission key (3) comprises a rod (3-1), a left part (3-2), and a right part (3-3), wherein: the rod (3-1) is realized by a screw and a nut, the left part (3-2) is designed in a T-shape, and the right part (3-3) is designed in a π-shape, the tongue of the T-shaped left part (3-2) is longitudinally provided with a long sliding groove, and the two tongues of the π-shaped right part (3-3) are respectively provided with round holes; the rod (3-1) passes through the first round hole of the right part (3-3), the long sliding groove of the left part (3-2), and the second round hole of the right part (3-3) in sequence through the screw, and is tightened and fixed with a nut at the other end; The horizontal force transmission key (3) is fixed between the hinged wall (1) and the hinged support column (2) through its left part (3-2) and right part (3-3); Under earthquake load, the lateral force causes the hinged wall (1) and the hinged support (2) to rotate around their respective bottom manifested hinged supports, and the left component (3-2) and the right component (3-3) connecting the two are shear-displaced. At this time, the rod (3-1) slides freely in the vertical direction in the long groove of the left component (3-2), only transmitting horizontal force, controlling the rotation coordination of the hinged wall (1) and the hinged support (2), and ensuring that the hinged wall (1) and the hinged support (2) have no out-of-plane offset.

5. The low prestressed green prefabricated self-resetting wall according to claim 1, characterized in that: The upper end connecting component (4-7) has a main body that is a hollow cylinder, which is divided into two upper and lower open cavities by an intermediate plate (4-7-4), wherein a top connecting plate (4-7-1) is fixed at the top opening of the upper cavity (4-7-2), and the lower cavity (4-7-3) has an open bottom and side walls that are symmetrically grooved along the central axis of the cavity; The lower end connecting component (4-11) comprises a cylindrical rod (4-11-1) and a bottom connecting plate (4-11-2) fixed to the bottom of the cylindrical rod (4-11-1); The middle connecting component (4-10) is provided with an opening in the center thereof for the lower cavity (4-7-3) of the upper connecting component (4-7) to pass through; The movable nested structure comprises a left end connecting component (4-8) and a right end connecting component (4-9), wherein the right end connecting component (4-9) is inserted into the left end connecting component (4-8); The left end connecting component (4-8) comprises a first cylinder (4-8-1) with a slotted side wall, a first wing (4-8-2) and a first connecting plate (4-8-3), wherein the first connecting plate (4-8-3) is connected to the wall portion (1-1) of the hinged wall (1) or the column portion (2-1) of the hinged support (2) by bolts, and the first wing (4-8-2) is fixed to the outer wall of the first cylinder (4-8-1), and the side wall of the first cylinder (4-8-1) is provided with a slot; The right end connecting component (4-9) comprises a second cylinder (4-9-1), a second wing (4-9-2) and a second connecting plate (4-9-3); the second connecting plate (4-9-3) is connected to the wall portion (1-1) of the hinged wall (1) or the column portion (2-1) of the hinged support (2) by bolts; and the second wing (4-9-2) is fixed to the outer wall of the second cylinder (4-9-1); The first cylinder (4-8-1) and the second cylinder (4-9-1) are at the same height; The second cylinder (4-9-1) is placed inside the first cylinder (4-8-1) to form a movable shaft body of a movable nested structure, and the second wing portion (4-9-2) extends from a groove on the side wall of the first cylinder (4-8-1), thereby forming a pair of wings of the movable nested structure together with the first wing portion (4-8-2) on the other side of the movable shaft body; Alternatively, the positions of the left and right connecting parts are interchanged.

6. The low prestressed green prefabricated self-resetting wall according to claim 5, characterized in that: In the axial direction, i.e., the length direction, the movable nesting structure is placed in the lower cavity (4-7-3) of the upper connecting part (4-7), and the first wing (4-8-2) and the second wing (4-9-2) extend from the slots on both sides of the lower cavity (4-7-3) for connection to the outside; the top of the movable shaft body of the movable nesting structure is in rigid contact with the middle plate (4-7-4) of the upper connecting part (4-7), and the bottom of the movable shaft body is placed on the top of the cylindrical rod (4-11-1) of the lower connecting part (4-11) and in rigid contact; the movable shaft body and the cylindrical rod (4-11-1) overlapped with each other are inserted together and confined in the lower cavity (4-7-3); under the input of external energy, the movable nesting structure slides against each other in the axial direction to promote the relative displacement of the upper connecting part (4-7) and the lower connecting part (4-11).

7. The low prestressed green prefabricated self-resetting wall according to claim 1, characterized in that: Width W of the first wing (4-8-2) 4-8,2 Smaller than the slot width W of the lower cavity (4-7-3) of the upper connecting part (4-7) 4-7 , the width W of the second wing (4-9-2) 4-9 At the same time, it is smaller than the slot width W of the first cylinder (4-8-1) of the left end connecting part (4-8) 4-8,1 The slot width W of the lower cavity (4-7-3) of the upper connecting part (4-7) is 4-7 To ensure that the left end connecting component (4-8) and the right end connecting component (4-9) can shift relative to each other in the lower cavity (4-7-3).

8. The low prestressed green prefabricated self-resetting wall according to claim 1, characterized in that: The energy dissipation system includes two or more energy dissipation steel bars (4-1); The upper and lower ends of the energy-absorbing steel rod (4-1) are respectively fixed on the top connecting plate (4-7-1) of the upper end connecting component (4-7) and the middle connecting component (4-10).

9. The low prestressed green prefabricated self-resetting wall according to claim 1, characterized in that: The self-resetting prestressed system includes a prestressed system and a self-resetting system: The prestressed system includes a prestressed screw (4-4), a disc spring baffle (4-6) and a disc spring group (4-5), wherein the disc spring baffle (4-6) is arranged at the top of the disc spring group (4-5); the disc spring group (4-5) is composed of a plurality of disc springs connected in parallel, and the disc spring group (4-5) and the disc spring baffle (4-6) are arranged in the upper cavity (4-7-2) of the upper connecting component; the top connecting plate (4-7-1) of the upper end connecting component (4-7) and the right end connecting component Through holes are reserved in the center of the second cylinder (4-9-1) of (4-9), the cylindrical rod (4-11-1) of the lower end connecting component (4-11), and the bottom connecting plate (4-11-2) of the lower end connecting component (4-11). The upper end of the prestressed screw (4-4) is fixed to the disc spring baffle (4-6), passes through the disc spring group (4-5) and the through holes of each connecting component in sequence, and is then fixed to the bottom connecting plate (4-11-2) of the lower end connecting component (4-11); The self-resetting system includes a self-locking clamp (4-2) and a high-strength steel rod (4-3); the self-locking clamp (4-2) is fixed on the middle connecting component (4-10), and the high-strength steel rod (4-3) is arranged between the middle connecting component (4-10) and the lower connecting component (4-11); specifically, the upper end of the high-strength steel rod (4-3) is connected to the self-locking clamp (4-2), and the lower end of the high-strength steel rod (4-3) is fixed on the bottom connecting plate (4-11-2) of the lower connecting component (4-11), together forming a one-way force transmission element.

10. The low prestressed green prefabricated self-resetting wall according to claim 9, characterized in that: The self-locking clamp (4-2) in the self-resetting system includes an anchor ring (4-2-1), a clamp (4-2-2), an O-type rubber ring (4-2-3), a reset spring (4-2-4) and a pressure cover assembly (4-2-5), wherein: The clips (4-2-2) are multiple pieces, built into the anchor ring (4-2-1) and enclosed outside the high-strength steel rod (4-3). A groove is reserved at the end thereof and an O-type rubber ring (4-2-3) is provided, so that the clips can work stably in the gap cavity between the anchor ring (4-2-1) and the high-strength steel rod (4-3). The return spring (4-2-4) is arranged on the upper part of the clamp (4-2-2), and the high-strength steel rod (4-3) passes through the return spring (4-2-4); The gland assembly (4-2-5) is arranged on the upper part of the anchor ring (4-2-1) and is used to support the return spring (4-2-4) to ensure axial stability during operation; When under tension, the self-locking clamp (4-2) bears the force by engaging the multiple enclosed clamping pieces (4-2-2) with the high-strength steel rod (4-3); and when under pressure, the clamping pieces (4-2-2) and the high-strength steel rod (4-3) are loosened, and relative sliding occurs with the high-strength steel rod (4-3) without bearing the force.

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