Force separation-adaptive collaborative control of fabricated self-resetting shear wall

Abstract

The application provides an assembled self-resetting shear wall with stress separation and self-adaptive cooperative control, which comprises a shear wall main body, two post-earthquake self-resetting friction energy dissipation devices, a state-adjustable yield energy dissipation device and a stress separation type matrix limiting device; the two post-earthquake self-resetting friction energy dissipation devices are respectively arranged on the two sides of the bottom of the shear wall main body and comprise a friction damping assembly and a shock insulation pre-pressing disc spring assembly; the stress separation type matrix limiting device comprises a steel support fixedly connected with the bottom of the shear wall main body, a load-bearing hinge support for hingedly connecting the steel support with a foundation and two or more shear-resistant hinge supports symmetrically arranged on the two sides of the load-bearing hinge support; and the state-adjustable yield energy dissipation device comprises a plurality of low-yield-point steel plates arranged at intervals, and the upper and lower ends of the low-yield-point steel plates are respectively connected with the top of the steel support and the foundation. The embodiment realizes the self-adaptive control of the four-level performance targets of small earthquakes, medium earthquakes, large earthquakes and giant earthquakes.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology, and in particular to a prefabricated self-resetting shear wall with force separation-adaptive cooperative control. Background Technology

[0002] Prefabricated buildings have developed rapidly in my country in recent years, with increasing demand. As the main system of prefabricated buildings, prefabricated shear walls are widely used due to their high stiffness and strength, and are often used as the main lateral force resisting components of structures, demonstrating good socio-economic benefits and application prospects.

[0003] Currently, prefabricated shear walls primarily utilize traditional wet connections such as grouted sleeves, and existing designs ensure sufficient strength and stiffness through the concept of equivalent cast-in-place construction. However, with increasing earthquake intensity, the insufficient ductility and difficulty in controlling plastic deformation of traditional prefabricated shear walls are becoming increasingly apparent. Under strong earthquakes, they are prone to irreparable damage and significant residual deformation, such as crushing of the concrete at the wall base, buckling of longitudinal reinforcement, and connection failure. This leads to difficulties in restoring the structure's function after an earthquake, resulting in severe economic losses.

[0004] Therefore, controlling the plastic damage and residual deformation of prefabricated shear walls and improving their seismic performance and post-earthquake recoverability are key issues that urgently need to be addressed. Summary of the Invention

[0005] The summary section of this invention provides a brief overview of the concepts, which will be described in detail in the detailed description section that follows. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] Some embodiments of the present invention provide prefabricated self-resetting shear walls with force separation-adaptive cooperative control to solve the technical problems mentioned in the background section above.

[0007] The prefabricated self-resetting shear wall with force separation-adaptive collaborative control includes a shear wall body, two post-earthquake self-resetting friction energy dissipation devices, a state-adjustable yield energy dissipation device, and a force separation matrix limiting device.

[0008] The two post-earthquake self-resetting friction energy dissipation devices are respectively installed on both sides of the bottom of the shear wall body; each post-earthquake self-resetting friction energy dissipation device includes, from top to bottom, a friction damping component for dissipating vibration energy and a seismic isolation preload disc spring component for seismic isolation and resetting, the friction damping component is hinged to the bottom of the shear wall body, and the seismic isolation preload disc spring component is hinged to the foundation.

[0009] The force-separating matrix limiting device includes a steel support fixedly connected to the bottom of the shear wall body, a load-bearing hinge support that hinges the steel support to the foundation, and two or more shear-resistant hinge supports symmetrically arranged on both sides of the load-bearing hinge support; the load-bearing hinge support is used to bear vertical pressure, and the shear-resistant hinge support is used to bear lateral shear force and limit the sway angle of the shear wall body.

[0010] The adjustable yield point energy dissipation device includes multiple low yield point steel plates spaced apart. The upper and lower ends of the low yield point steel plates are respectively connected to the top of the steel support and the foundation. The low yield point steel plates are used to deform and dissipate vibration energy when the steel support is torn.

[0011] The above embodiments of the present invention have the following beneficial effects: The prefabricated self-resetting shear wall with force separation-adaptive collaborative control of the present invention provides vertical stiffness by setting up a seismic isolation preload disc spring assembly, playing a seismic isolation role in minor earthquakes. During moderate earthquakes, the aforementioned friction damping assembly can dissipate vibration energy. During major earthquakes, since the aforementioned state-adjustable yield energy dissipation device includes multiple spaced low-yield-point steel plates, when the shear wall body drives the steel support to torsion, the low-yield-point steel plates deform to dissipate vibration energy and perform passive adaptive control. During mega-earthquakes, the aforementioned load-bearing hinge supports bear vertical pressure, and the shear hinge supports provide a limiting function to prevent the wall from swaying uncontrollably and collapsing. After the earthquake, the aforementioned seismic isolation preload disc spring assembly provides self-resetting capability to control overall residual deformation.

[0012] In this way, adaptive control of the "four levels" performance targets of minor earthquakes, moderate earthquakes, major earthquakes and mega earthquakes is achieved.

[0013] The prefabricated self-resetting shear wall with force separation and adaptive collaborative control is a prefabricated structure. The self-resetting friction energy dissipation device and the state-adjustable yield energy dissipation device can be quickly replaced and repaired after the earthquake, which is highly economical. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to the present invention;

[0016] Figure 2This is a schematic diagram of a structure of one embodiment of the post-earthquake self-resetting friction energy dissipation device of the present invention;

[0017] Figure 3 This is an exploded view of an embodiment of the vibration isolation preloaded disc spring assembly of the present invention;

[0018] Figure 4 This is a schematic diagram of a structure of an embodiment of the force-separated matrix limiting device of the present invention;

[0019] Figure 5 This is a schematic diagram of one embodiment of the state-adjustable yield energy dissipation device of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1: Shear wall main body; 11: Precast RC wall; 12: Embedded steel beam;

[0022] 2: Foundation; 21: Pad;

[0023] 3: Post-earthquake self-resetting friction energy dissipation device; 31: Upper hinge seat; 32: Lower hinge seat; 33: Seismic isolation preload disc spring assembly; 331: Preload disc spring; 3311: Upper fixed plate; 3312: Upper sliding plate; 3313: Lower sliding plate; 3314: Lower fixed plate; 332: Top plate; 333: Side plate; 334: Lower support; 335: Limiting strip; 336: Upper support; 34: Friction damping assembly;

[0024] 4: Force-separated matrix limiting device; 41: Steel support; 42: First rotating seat; 43: First fixed seat; 44: First hinge shaft; 45: First strip-shaped through hole; 46: Second rotating seat; 47: Second fixed seat; 48: Second hinge shaft; 49: First arc-shaped through hole;

[0025] 5: Adjustable yield energy dissipation device; 51: Low yield point steel plate; 52: Upper side beam; 53: Lower side beam; 54: Pin component; 55: Second strip-shaped through hole; 56: Second arc-shaped through hole. Detailed Implementation

[0026] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Please refer to the following first. Figure 1 , Figure 1 This is a structural schematic diagram of an embodiment of the prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to the present invention. Figure 1 As shown, the prefabricated self-resetting shear wall includes a shear wall body 1, two post-earthquake self-resetting friction energy dissipation devices 3, a state-adjustable yield energy dissipation device 5, and a force-separated matrix limiting device 4.

[0031] To improve the stiffness of the shear wall body 1, enabling it to rotate rigidly during an earthquake, such as... Figure 1As shown, the shear wall body 1 may include a precast RC (Reinforced Concrete) wall 11 and embedded steel beams 12 at the upper and lower ends of the precast RC wall 11. Further, multiple studs are provided on the side of the embedded steel beams 12 facing the precast RC wall 11. The use of these studs improves the shear and stripping resistance of the shear wall body 1. In addition, the two post-earthquake self-resetting friction energy dissipation devices 3 and the force-separating matrix limiting device 4 are all connected to the bottom of the shear wall body 1. Compared to a shear wall made solely of concrete, the embedded steel beams 12 enhance the connection strength and prevent irreparable damage and significant residual deformation at the bottom of the shear wall body 1, such as concrete crushing, longitudinal reinforcement buckling, and connection failure.

[0032] Please refer to the following. Figure 2 , Figure 3 And continue to refer to Figure 1 , Figure 2 This is a schematic diagram of a structure of one embodiment of the post-earthquake self-resetting friction energy dissipation device of the present invention; Figure 3 This is an exploded view of one embodiment of the vibration-isolation preloaded disc spring assembly of the present invention. Figure 1 , Figure 2 and Figure 3 As shown, the two post-earthquake self-resetting friction energy dissipation devices 3 are respectively installed on both sides of the bottom of the shear wall body 1. Specifically, each post-earthquake self-resetting friction energy dissipation device 3 can be connected to the two side edges of the bottom of the lower embedded steel beam 12. The upper and lower ends of each post-earthquake self-resetting friction energy dissipation device 3 are hinged to the bottom of the shear wall body 1 and the foundation 2, respectively.

[0033] Specifically, the post-earthquake self-resetting friction energy dissipation device 3 comprises, from top to bottom, a friction damping assembly 34 and a seismic isolation preload disc spring assembly 33 connected together. The friction damping assembly 34 is hinged to the bottom of the shear wall body 1 via an upper hinge seat 31. The seismic isolation preload disc spring assembly 33 is hinged to the foundation 2 via a lower hinge seat 32.

[0034] The aforementioned seismic isolation preload disc spring assembly 33 is used for seismic isolation during an earthquake and for resetting the shear wall body 1 after an earthquake. The seismic isolation preload disc spring assembly 33, from top to bottom, includes an upper support 336 connected to the aforementioned friction damping assembly 34, an upper fixed plate 3311, an upper sliding plate 3312, a preload disc spring 331, a lower sliding plate 3313, a lower fixed plate 3314, and a lower support 334 hinged to the aforementioned foundation 2. The upper support 336 is fixedly connected to the upper fixed plate 3311, and the upper fixed plate 3311 and the upper sliding plate 3312 are stacked. The upper sliding plate 3312 is fixedly connected to the top of the pre-compressed disc spring 331, the lower sliding plate 3313 is fixedly connected to the bottom of the pre-compressed disc spring 331, the lower sliding plate 3313 is stacked with the lower fixing plate 3314, and the lower fixing plate 3315 is fixedly connected to the lower support 334.

[0035] Furthermore, the post-earthquake self-resetting friction energy dissipation device 3 also includes a limiting component for restricting the deformation direction of the seismic isolation preload disc spring assembly 33 and the friction damping assembly 34. The limiting component includes a top plate 332 connected to the upper hinge seat 31, two side plates 333 spaced apart to the bottom of the top plate 332, and upper and lower limiting grooves formed by limiting strips 335 connecting the two side plates 333. The two limiting grooves are slidably connected to the upper fixed plate 3311, the upper sliding plate 3312, the lower sliding plate 3313, and the lower fixed plate 3314, respectively.

[0036] The friction damping assembly 34 can be a friction damper, including a fixed end and a movable end, the fixed end and the movable end being slidably connected, and it can be made of frictional steel plate. The fixed end of the friction damping assembly is fixedly connected to the upper support 336, and the movable end of the friction damping assembly is fixedly connected to the bottom of the top plate 332.

[0037] During minor earthquakes, the top plate 332 and the two side plates 333 exert downward forces on the preloaded disc spring 331 after being subjected to stress, causing the preloaded disc spring 331 to enter the critical state of compression, while the shear wall body 1 remains elastic as a whole. During moderate earthquakes, the frictional steel plate, acting as an energy-dissipating damper, yields and dissipates energy. After the earthquake, the aforementioned seismic isolation preloaded disc spring assembly 33 provides self-resetting capability to control overall residual deformation.

[0038] Please refer to the following. Figure 4 , Figure 4 This is a schematic diagram of a structure of an embodiment of the force-separated matrix limiting device of the present invention. Figure 4 and Figure 1As shown, the aforementioned force-separated matrix limiting device 4 includes a steel support 41 fixedly connected to the bottom of the shear wall body 1, a load-bearing hinge support that hinges the steel support 41 to the foundation 2, and two shear-resistant hinge supports symmetrically arranged on both sides of the load-bearing hinge support. It should be noted that, although... Figure 1 and Figure 4 The example shown uses two shear hinge supports, but those skilled in the art can set multiple symmetrically arranged shear hinge supports according to the width of the shear wall body.

[0039] The aforementioned load-bearing hinge support is used to withstand vertical pressure. This load-bearing hinge support includes a first rotating seat 42, a first fixed seat 43, and a first hinge shaft 44. The first fixed seat 43 has a horizontal first strip-shaped through hole 45, through which the first hinge shaft 44 passes, allowing the first fixed seat 43 and the first rotating seat 42 to be rotatably connected. The first fixed seat 43 is connected to the foundation 2, and the first rotating seat 42 is connected to the bottom of the steel support 41.

[0040] The aforementioned shear hinge supports are used to withstand lateral shear forces and limit the sway angle of the shear wall main body. Each of the aforementioned shear hinge supports includes a second rotating seat 46, a second fixed seat 47, and a second hinge shaft 48. The aforementioned second fixed seat 47 is provided with a first arc-shaped through hole 49, which is formed by protruding from the side opposite to the aforementioned load-bearing hinge support. The aforementioned second hinge shaft 48 passes through the aforementioned first arc-shaped through hole 49, allowing the aforementioned second fixed seat 47 and the aforementioned second rotating seat 46 to be rotatably connected. The aforementioned second fixed seat 47 is connected to the aforementioned foundation 2, and the aforementioned second rotating seat 46 is connected to the bottom of the aforementioned steel support 41. When there are more than two aforementioned second fixed seats 47, the first arc-shaped through hole 49 of the second fixed seat 47 gradually becomes longer along the direction opposite to the aforementioned load-bearing hinge support.

[0041] During a major earthquake, the shear wall body 1 can rotate around the first strip-shaped through-hole 45 of the load-bearing hinge support along the first arc-shaped through-hole 49. This achieves force separation without affecting the swaying deformation mode. Its vertical deformation capacity should not be less than the product of the target rotation angle and the relative distance to the shear hinge support. The number of these through-holes can be reasonably designed according to actual needs. Even if subjected to unexpected earthquake forces, the first arc-shaped through-hole 49 can provide a limiting function to prevent uncontrolled swaying, while the load-bearing hinge support, which only bears vertical loads, always maintains normal working condition. It is evident that force separation control greatly improves the safety of the shear wall.

[0042] Please see last. Figure 5 , Figure 5 This is a schematic diagram of one embodiment of the state-adjustable yield energy dissipation device of the present invention. Figure 5 and Figure 1As shown, the adjustable yield energy dissipation device 5 comprises multiple low-yield-point steel plates spaced apart, and upper beams 52, lower beams 53, and multiple pin components 54 connecting the upper and lower ends of the aforementioned multiple low-yield-point steel plates. The upper beam 52 has a horizontal second strip-shaped through hole 55 in its center, and one or more second arc-shaped through holes 56 symmetrically arranged on both sides of the second strip-shaped through hole 55, with the second arc-shaped through holes 56 protruding upwards. One end of each pin component 54 is fixedly connected to the steel support 41, and the other end of each pin component 54 passes through the second strip-shaped through hole 55 or the second arc-shaped through hole 56. The number of the second arc-shaped through holes 56 and the number of pin components 54 can be adjusted according to the width of the shear wall body 1. During a major earthquake, the steel support 41 causes the adjustable yield energy dissipation device to deform, providing lateral stiffness for passive adaptive control of the displacement response.

[0043] The aforementioned low yield point steel plate 51 can be formed in a dumbbell shape. Those skilled in the art can determine the material of the aforementioned low yield point steel plate based on common knowledge or existing technology.

[0044] Furthermore, a pad 21 can be provided between the aforementioned load-bearing hinge support, the aforementioned shear-resistant hinge support, and the lower hinge support and the foundation 2 to improve the hinge strength.

[0045] The proposed prefabricated self-resetting shear wall with force separation and adaptive collaborative control achieves adaptive control of performance targets at four levels: minor, moderate, major, and mega-earthquakes. Based on this adaptive behavior, during minor earthquakes, the preloaded disc springs enter a critical compression state, and the shear wall as a whole remains elastic. During moderate earthquakes, the friction damping component yields and dissipates energy as an energy-dissipating damper. During major earthquakes, the state-adjustable yielding energy-dissipating device provides lateral stiffness for passive adaptive control of displacement response. During mega-earthquakes, the state-adjustable yielding energy-dissipating device yields and dissipates seismic energy, while the shear hinge support simultaneously provides a limiting function to prevent the shear wall from swaying and collapsing uncontrollably. After the earthquake, the wall basically remains elastic or suffers minimal damage, and the preloaded disc springs provide self-resetting capability to control overall residual deformation.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated self-resetting shear wall with force separation-adaptive cooperative control, characterized in that, It includes the shear wall main body, two post-earthquake self-resetting friction energy dissipation devices, a state-adjustable yield energy dissipation device, and a force-separated matrix limiting device, among which, The two post-earthquake self-resetting friction energy dissipation devices are respectively installed on both sides of the bottom of the shear wall body; each post-earthquake self-resetting friction energy dissipation device includes, from top to bottom, a friction damping component for dissipating vibration energy and a seismic isolation preload disc spring component for seismic isolation and resetting, the friction damping component is hinged to the bottom of the shear wall body, and the seismic isolation preload disc spring component is hinged to the foundation. The force-separating matrix limiting device includes a steel support fixedly connected to the bottom of the shear wall body, a load-bearing hinge support that hinges the steel support to the foundation, and two or more shear-resistant hinge supports symmetrically arranged on both sides of the load-bearing hinge support; the load-bearing hinge support is used to bear vertical pressure, and the shear-resistant hinge support is used to bear lateral shear force and limit the sway angle of the shear wall body. The adjustable yield point energy dissipation device includes multiple low yield point steel plates spaced apart. The upper and lower ends of the low yield point steel plates are respectively connected to the top of the steel support and the foundation. The low yield point steel plates are used to deform and dissipate vibration energy when the steel support is torn.

2. The prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to claim 1, characterized in that, The shear wall body includes a precast RC wall and precast steel beams embedded at the upper and lower ends of the precast RC wall. The two precast steel beams are provided with multiple studs on the side facing the precast RC wall.

3. The prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to claim 1, characterized in that, The vibration isolation preloaded disc spring assembly comprises, from top to bottom, an upper support connected to the friction damping assembly, an upper fixed plate, an upper sliding plate, a preloaded disc spring, a lower sliding plate, a lower fixed plate, and a lower support hinged to the foundation; the upper support is fixedly connected to the upper fixed plate, the upper fixed plate is stacked on top of the upper sliding plate, the upper sliding plate is fixedly connected to the top of the preloaded disc spring, the lower sliding plate is fixedly connected to the bottom of the preloaded disc spring, the lower sliding plate is stacked on top of the lower fixed plate, and the lower fixed plate is fixedly connected to the lower support.

4. The prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to claim 3, characterized in that, The post-earthquake self-resetting friction energy dissipation device also includes a limiting component for limiting the deformation direction of the seismic isolation preload disc spring assembly and the friction damping assembly. The limiting component includes a top plate hinged to the shear wall body, two side plates spaced apart to the bottom of the top plate, and two limiting grooves connecting the two side plates. The two limiting grooves are slidably connected to the upper fixed plate, the upper sliding plate, the lower sliding plate, and the lower fixed plate, respectively.

5. The prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to claim 4, characterized in that, The fixed end of the friction damping assembly is fixedly connected to the upper support, and the movable end of the friction damping assembly is fixedly connected to the bottom of the top plate.

6. The prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to claim 1, characterized in that, The load-bearing hinge support includes a first rotating seat, a first fixed seat, and a first hinge shaft. The first fixed seat has a horizontal first strip-shaped through hole. The first hinge shaft passes through the first strip-shaped through hole to rotatably connect the first fixed seat and the first rotating seat. The first fixed seat is connected to the foundation, and the first rotating seat is connected to the bottom of the steel support.

7. The prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to claim 1, characterized in that, Each of the shear-resistant hinge supports includes a second rotating seat, a second fixed seat, and a second hinge shaft. The second fixed seat is provided with a first arc-shaped through hole, which is formed by protruding from the side away from the load-bearing hinge support. The second hinge shaft passes through the first arc-shaped through hole to rotatably connect the second fixed seat and the second rotating seat. The second fixed seat is connected to the foundation, and the second rotating seat is connected to the bottom of the steel support. When there are more than two second fixed seats, the first arc-shaped through hole of the second fixed seat gradually becomes longer along the direction away from the load-bearing hinge support.

8. The prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to claim 1, characterized in that, The adjustable yield energy dissipation device further includes an upper beam, a lower beam, and multiple pin components connecting the upper and lower ends of the plurality of low yield point steel plates. The upper beam has a horizontal second strip-shaped through hole in the middle, and one or more second arc-shaped through holes are symmetrically arranged on both sides of the second strip-shaped through hole. The second arc-shaped through holes protrude upwards. One end of the plurality of pin components is fixedly connected to the steel support, and the other end of the pin component passes through the second strip-shaped through hole or the second arc-shaped through hole.

9. The prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to claim 8, characterized in that, The low yield point steel plate is dumbbell-shaped.

10. The prefabricated self-resetting shear wall with force separation-adaptive cooperative control according to any one of claims 1-9, characterized in that, A pad is also provided between the foundation and the vibration isolation preloaded disc spring assembly, the load-bearing hinge support, and the shear-resistant hinge support.

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