Tuning self-resetting wall structure system for improving seismic toughness of existing building

Abstract

The invention relates to a tuning self-resetting wall structure system capable of improving the seismic toughness of an existing building, which comprises a self-resetting wall, a linear viscoelastic device, a protection frame, a buffer element and an additional damping element, and is characterized in that the self-resetting wall is an external substructure of a main body structure and is connected with the main body structure in parallel; the self-resetting wall is connected with a foundation of a main body structure through prestressed tendons, a protection frame is arranged on the outer side of the bottom of the self-resetting wall and fixed to the foundation of the main body structure, and the two sides of the self-resetting wall are connected with a floor of the main body structure through linear viscoelastic devices. The linear viscoelastic device is formed by connecting one or more of a variable inerter element, a variable rigidity element and a variable damping element in parallel, a buffering element is arranged on the inner side of the protection frame, and the self-resetting wall is connected with the protection frame through an additional damping element. Compared with the prior art, the anti-seismic toughness of an existing building under the action of an earthquake is improved, damage of the earthquake to a building structure is reduced, and automatic resetting of the wall after the earthquake is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of earthquake-resistant structural systems, and relates to a tuned self-resetting wall structural system for improving the earthquake-resistant toughness of existing buildings. Background Art

[0002] It is very important for buildings to maintain a certain degree of functional integrity and safety after being hit by external shocks such as natural disasters and human damage, and to have the ability to recover quickly and adapt. In recent years, earthquake disasters have occurred frequently, and traditional earthquake-resistant building structures may be severely damaged under the action of earthquakes, and the cost of post-earthquake repair is high. Based on recent earthquake damage experience, the current earthquake-resistant design methods face the following practical problems:

[0003] (1) Traditional earthquake-resistant technologies mainly use methods such as strengthening columns, beams, and joints, but these methods cannot guarantee the earthquake-resistant resilience of buildings;

[0004] (2) Traditional tuning technology mainly relies on tuned mass dampers, which are usually installed on the top of the structure. However, their effect on controlling the seismic response of the structure is generally limited.

[0005] Patent CN106948637A discloses a shock absorption system with a self-resetting movable substructure, including a main structure and a movable substructure, wherein the upper part of the movable substructure is connected to the main structure through a node that provides torsional or translational stiffness, and the bottom of the movable substructure is connected to the ground through an energy-absorbing component. However, the energy-absorbing method of the patent is relatively single, and its adaptability to different earthquake effects is limited. Moreover, when the movable substructure swings too much, it is difficult to return to its original position and needs to be repaired after the earthquake.

[0006] Patent CN112982730A discloses a self-resetting wall with tuning-swing-friction composite graded energy dissipation function, which is composed of prefabricated wall, steel strand, long metal rubber pad, short metal rubber pad, air spring, sliding hinge support, arc friction energy dissipation device; the bottom of the prefabricated wall is hinged by sliding hinge support and lateral stiffness is provided by air spring, and the swing frequency of the prefabricated wall is controlled near the main structure frequency by adjusting the lateral stiffness provided by the air spring, so as to play the role of energy dissipation and shock absorption; when the seismic action is small, the tuned mass damper composed of the prefabricated wall performs swing energy dissipation and shock absorption; when the seismic action is large, while the prefabricated wall is swinging and consuming energy, the friction plates in the arc friction energy dissipation device contact each other and begin to play the role of friction energy dissipation. However, the structure of the patent is relatively complex, involving multiple connection devices such as steel strand, sliding hinge support, metal rubber pad, air spring, and arc friction energy dissipation device composed of various types of metal plates, arc friction plates, arc smooth plates, etc., and the adaptability to different seismic actions is limited. Summary of the invention

[0007] The purpose of the present invention is to overcome at least one defect of the above-mentioned prior art and to provide a tuned self-resetting wall structure system for improving the seismic resilience of existing buildings. The present invention improves the seismic resilience of existing buildings under earthquakes, reduces the damage caused by earthquakes to building structures, and realizes automatic reset of walls after earthquakes.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] One of the technical solutions of the present invention is to provide a tuned self-resetting wall structure system for improving the seismic toughness of existing buildings, the system includes a self-resetting wall, a linear viscoelastic device, a protection frame, a buffer element and an additional damping element, the self-resetting wall is an external substructure of the main structure, connected in parallel with the main structure, the self-resetting wall is connected to the foundation of the main structure through prestressed tendons, a protection frame is arranged on the outside of the bottom of the self-resetting wall, the protection frame is fixed on the foundation of the main structure, the protection frame prevents the self-resetting wall from overturning and swinging too much, and ensures that the linear viscoelastic device always remains within the linear elastic range, the two sides of the self-resetting wall are connected to the floor slab of the main structure through the linear viscoelastic device, this connection method allows the self-resetting wall to independently reset relative to the main structure under the action of an earthquake, thereby absorbing and dissipating seismic energy, the linear viscoelastic device allows the self-resetting wall to generate a damping force when self-resetting, which helps to reduce the self-resetting amplitude of the self-resetting wall and provide necessary energy dissipation, the linear viscoelastic device adopts one or more of a variable inertia element, a variable stiffness element, and a variable damping element in parallel, the variable inertia element The element is attached to the self-resetting wall and is used to enhance the inertia effect of the tuned self-resetting wall structure system, significantly improving the additional inertia of the tuned self-resetting wall structure system, so that the tuned self-resetting wall structure system can generate a larger inertial force under the action of an earthquake, thereby improving the dynamic response capability of the tuned self-resetting wall structure under the action of an earthquake, and further absorbing and dissipating the earthquake energy. The variable stiffness element adapts to different earthquake actions and building structure requirements by adjusting the stiffness value, thereby optimizing the performance of the tuned self-resetting wall structure system. The variable damping element controls the vibration amplitude of the self-resetting wall by adjusting the damping coefficient, reduces the energy transfer, and thus improves the seismic performance of the structure. A buffer element is arranged on the inner side of the protection frame, which prevents the self-resetting wall from over-traveling and ensures that the linear viscoelastic device remains within the linear elastic range. This is particularly important for a self-resetting wall with a hinged connection, because if the linear viscoelastic device fails, the stability of the self-resetting wall will be threatened. The self-resetting wall is connected to the protection frame through an additional damping element, which can provide additional support and stability, ensuring that the self-resetting wall can be smoothly reset under the action of an earthquake.

[0010] As a preferred technical solution, the width of the protection frame is greater than that of the self-resetting wall, which can provide a larger supporting area, thereby improving the stability and bearing capacity of the entire structure.

[0011] Furthermore, the parts on both sides of the self-resetting wall that are symmetrical to the non-protection frame are horizontally connected to the floor slabs of the main structure through a variety of vertically parallel variable inertia elements, variable stiffness elements or variable damping elements, which can provide a variety of adjustment options to adapt to different earthquake effects and building structure requirements.

[0012] Furthermore, one side of the self-resetting wall is horizontally connected to the floor slab of the main structure at the part where the protection frame is set through a variable inertia element, a variable stiffness element or a variable damping element, and the other side of the self-resetting wall is horizontally connected to the floor slab of the main structure at the part where the protection frame is set through another variable inertia element, a variable stiffness element or a variable damping element, thereby providing a variety of adjustment options to adapt to different earthquake effects and building structure requirements.

[0013] Furthermore, a buffer element is provided on the inner side of the vertical frame of the protection frame, which can prevent the self-resettling wall from over-travelling and ensure that the connected linear viscoelastic device remains within its linear elastic range, thereby improving the seismic resistance of the structure, and can provide additional support and stability to ensure that the self-resettling wall can be smoothly reset under the action of an earthquake. The output end of the additional damping element is fixedly connected to the center of the self-resettling wall, and the fixed end is fixedly connected to the cross frame of the protection frame. The design of the output end being connected to the self-resettling wall helps to improve the stability and seismic resistance of the self-resettling wall.

[0014] Furthermore, the cross frame of the protection frame is located between the floor slabs of adjacent main structures, which can ensure that the self-resetting wall can be smoothly reset under the action of an earthquake while reducing the impact on the main structure. The cross frame of the protection frame with an additional damping element is adjacent to the floor slab of the main structure in which a linear viscoelastic device is arranged in the protection frame.

[0015] Furthermore, the two ends of the variable stiffness element are respectively fixedly connected to one side of the self-resettling wall and the floor slab of the main structure, the output end of the variable inertia element or the variable damping element is fixedly connected to one side of the self-resettling wall, and the fixed end is fixedly connected to the floor slab of the main structure. This design of connecting the output end to the self-resettling wall helps to improve the stability and seismic resistance of the self-resettling wall.

[0016] Furthermore, the variable inertia element is selected from a rack-flywheel inertia container, a ball screw inertia container, an electromagnetic damper or a fluid damper, which significantly enhances the inertia of the wall by generating a resistance proportional to the relative acceleration between the end points, and can adjust the inertia coefficient in real time according to the seismic response to optimize the performance of the tuned self-righting wall structure system, so that it can better adapt to different seismic actions and building structure requirements.

[0017] Furthermore, the variable stiffness element is selected from a spring or a magnetorheological elastomer, and can adjust the stiffness value in real time according to the earthquake response to optimize the performance of the tuned self-righting wall structure system, so that it can better adapt to different earthquake effects and building structure requirements.

[0018] Furthermore, the variable damping element is selected from an oil damper, an eddy current damper or a magnetorheological damper, and can adjust the damping coefficient in real time according to the seismic response to optimize the performance of the tuned self-righting wall structure system so that it can better adapt to different seismic actions and building structure requirements.

[0019] Furthermore, the buffer element is selected from a rubber buffer, a metal spring buffer or an air buffer, and the additional damping element is selected from a viscous damper or an air spring.

[0020] As a preferred technical solution, the shape, height and connection of the self-resetting wall can be adjusted according to the specific building structure and earthquake action to achieve the desired optimal control performance without significantly affecting the beauty and functionality of the building.

[0021] As a preferred technical solution, the connection position between the self-resetting wall and the floor slab of the main structure is selected according to the building structure characteristics and seismic requirements to achieve the best seismic toughness improvement effect.

[0022] As a preferred technical solution, the self-resetting wall is made of high-strength and high-toughness materials, and the high-strength and high-toughness materials are selected from steel, reinforced concrete, fiber-reinforced composite materials (FRP) or high-performance concrete to meet the requirements of earthquake resistance and self-resetting, and ensure sufficient strength and rigidity while maintaining appropriate mass to provide the required inertia effect.

[0023] As a preferred technical solution, the material of the protection frame is selected from steel, wood or concrete.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) Compared with traditional building structures or other wall structures with self-resetting designs, in the present invention, a greater mass transfer effect is achieved through the design of the self-resetting wall structure system; the tuned self-resetting wall structure system provides a huge potential for containing a larger mass, which is transferred to the foundation rather than the main structure; this highlights the potential of the tuned self-resetting wall structure system as an effective alternative to the seismograph fitting technology for detecting mid-rise structures, enhancing the seismic resistance of the structure; the tuned self-resetting wall structure system can absorb and dissipate seismic energy through the dynamic response of the self-resetting wall, thereby reducing the impact of the earthquake on the main structure, playing a role similar to that of a seismograph;

[0026] (2) In the present invention, the seismic toughness effect is achieved by connecting the linear viscoelastic device to the floor of the main structure; the linear viscoelastic device allows the self-resetting wall to independently reset itself relative to the main structure under the action of an earthquake, thereby absorbing and dissipating seismic energy; by integrating the tuned self-resetting wall structure into an existing building, the seismic toughness of the building under the action of an earthquake can be significantly improved;

[0027] (3) In the present invention, by connecting the additional damping element to the protection frame, the stability and rapid recovery ability of the wall after an earthquake are ensured, and the effect of automatic reset is achieved; the design of the tuned self-resetting wall structure system allows the wall to automatically reset after an earthquake, reducing the repair work after an earthquake;

[0028] (4) In the present invention, the tuned self-resetting wall structure controls the seismic response of the main structure through tuning, energy dissipation and shock absorption, and self-resetting, and transfers the vibration energy from the main structure to the tuned self-resetting wall, thereby improving the seismic toughness; this effect is achieved through the synergistic effect of the protection frame, buffer elements and additional damping elements, ensuring the stability and flexibility of the self-resetting wall during an earthquake; the material and design of the variable inertia element, variable stiffness element and variable damping element can be adjusted according to the specific building structure and seismic action to achieve the best control performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of a tuned self-resetting wall structure system for improving the seismic toughness of an existing building in an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the bottom structure of a tuned self-resetting wall structure system for improving the seismic toughness of an existing building in an embodiment of the present invention;

[0031] Figure 3 Schematic diagram of the connection relationship of a tuned self-resetting wall structure system for improving the seismic resilience of an existing building in an embodiment of the present invention.

[0032] Description of the markings in the figure:

[0033] 1—main structure, 11—floor slab, 12—foundation, 2—self-resetting wall, 3—variable inertia element, 4—variable stiffness element, 5—variable damping element, 6—protection frame, 7—buffer element, 8—additional damping element. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are used to describe common objects, which only refer to different instances of the same object, and are not intended to imply that the objects described in this way must adopt a given order, whether in time, space, order or any other way.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Example:

[0038] A tuned self-centering wall structure system for improving the seismic resilience of existing buildings, such as Figures 1 to 3As shown, it includes a self-resetting wall 2, a linear viscoelastic device, a protection frame 6, a buffer element 7 and an additional damping element 8. The self-resetting wall 2 is an external substructure of the main structure 1 and is connected in parallel with the main structure 1. The self-resetting wall 2 is connected to the foundation 12 of the main structure 1 through prestressed tendons. A protection frame 6 is arranged on the outside of the bottom of the self-resetting wall 2. The protection frame 6 is fixed on the foundation 12 of the main structure 1. The protection frame 6 prevents the self-resetting wall 2 from overturning and swinging too much, ensuring that the linear viscoelastic device always remains within the linear elastic range. Both sides of the self-resetting wall 2 are connected to the floor 11 of the main structure 1 through the linear viscoelastic device. This connection method allows the self-resetting wall 2 to independently reset relative to the main structure 1 under the action of an earthquake, thereby absorbing and dissipating seismic energy. The linear viscoelastic device allows the self-resetting wall 2 to generate a damping force during self-resetting, which helps to reduce the self-resetting amplitude of the self-resetting wall 2 and provide necessary energy dissipation. The linear viscoelastic device adopts one or more of a variable inertia element 3, a variable stiffness element 4, and a variable damping element 5 in parallel. The variable inertia element 3 is attached to the self-resetting wall 2 for The inertia effect of the tuned self-resetting wall structure system is enhanced, and the additional inertia of the tuned self-resetting wall structure system is significantly improved, so that the tuned self-resetting wall structure system can generate a larger inertia force under the action of an earthquake, thereby improving the dynamic response capability of the tuned self-resetting wall structure under the action of an earthquake, and further absorbing and dissipating the earthquake energy. The variable stiffness element 4 adjusts the stiffness value to adapt to different earthquake actions and building structure requirements, thereby optimizing the performance of the tuned self-resetting wall structure system. The variable damping element 5 controls the vibration amplitude of the self-resetting wall 2 by adjusting the damping coefficient, reduces the energy transfer, and thus improves the seismic performance of the structure. A buffer element 7 is arranged on the inner side of the protection frame 6. The buffer element 7 prevents the self-resetting wall 2 from over-traveling and ensures that the linear viscoelastic device remains within the linear elastic range. This is especially important for the self-resetting wall 2 with a hinged connection, because if the linear viscoelastic device fails, the stability of the self-resetting wall 2 will be threatened. The self-resetting wall 2 is connected to the protection frame 6 through an additional damping element 8, which can provide additional support and stability, ensuring that the self-resetting wall 2 can be smoothly reset under the action of an earthquake.

[0039] The width of the protection frame 6 is greater than that of the self-resetting wall 2, which can provide a larger support area, thereby improving the stability and bearing capacity of the entire structure;

[0040] The parts of the self-resetting wall 2 on both sides symmetrical to the non-protection frame 6 are horizontally connected to the floor 11 of the main structure 1 through a variety of vertically parallel variable inertia elements 3, variable stiffness elements 4 or variable damping elements 5, which can provide a variety of adjustment options to adapt to different earthquake effects and building structure requirements. In this embodiment, three vertically parallel variable stiffness elements 4, variable inertia elements 3 and variable stiffness elements 4 are preferred, which can enhance the connection strength between the self-resetting wall 2 and the main structure 1 and improve the overall seismic performance of the structure;

[0041] One side of the self-resetting wall 2 is horizontally connected to the floor 11 of the main structure 1 through a variable inertia element 3, a variable stiffness element 4 or a variable damping element 5 at the part where the protection frame 6 is set, and the other side is horizontally connected to the floor 11 of the main structure 1 through another variable inertia element 3, a variable stiffness element 4 or a variable damping element 5 at the part where the protection frame 6 is set, which can provide a variety of adjustment options to adapt to different earthquake effects and building structure requirements. In this embodiment, it is preferred that three vertically parallel variable damping elements 5 are arranged on one side and three vertically parallel variable stiffness elements 4 are arranged on the other side, so that asymmetric connection can be achieved on both sides to adapt to different earthquake action directions and building structure characteristics;

[0042] The two ends of the variable stiffness element 4 are respectively fixedly connected to one side of the self-resetting wall 2 and the floor 11 of the main structure 1, the output end of the variable inertia element 3 or the variable damping element 5 is fixedly connected to one side of the self-resetting wall 2, and the fixed end is fixedly connected to the floor 11 of the main structure 1. The design of connecting the output end to the self-resetting wall 2 helps to improve the stability and seismic performance of the self-resetting wall 2.

[0043] A buffer element 7 is provided on the inner side of the vertical frame of the protection frame 6, which can prevent the self-resetting wall 2 from over-travelling, ensure that the connected linear viscoelastic device remains within its linear elastic range, thereby improving the seismic performance of the structure, and can provide additional support and stability to ensure that the self-resetting wall 2 can be smoothly reset under the action of an earthquake. In this embodiment, the buffer element 7 is preferably provided on the inner side of the top of the vertical frame of the protection frame 6, and the output end of the additional damping element 8 is fixedly connected to the center of the self-resetting wall 2, and the fixed end is fixedly connected to the cross frame of the protection frame 6. The design of connecting the output end to the self-resetting wall 2 helps to improve the stability and seismic performance of the self-resetting wall 2. In this embodiment, the fixed end is preferably fixedly connected to the upper side of the cross frame of the protection frame 6;

[0044] The cross frame of the protection frame 6 is located between the floors 11 of the adjacent main structures 1, which can ensure that the self-resetting wall 2 can be smoothly reset under the action of an earthquake, while reducing the impact on the main structure 1. The cross frame of the protection frame 6 with the additional damping element 8 is adjacent to the floor 11 of the main structure 1 in which the linear viscoelastic device is arranged in the protection frame 6. In this embodiment, the cross frame of the protection frame 6 with the additional damping element 8 is located above the floor 11 of a specific floor of the main structure 1 in which three vertically parallel variable damping elements 5 are arranged on one side and three vertically parallel variable stiffness elements 4 are arranged on the other side in the protection frame 6.

[0045] The variable inertia element 3 is selected from a rack-driven wheel-flywheel inertia container, a ball screw inertia container, an electromagnetic damper or a fluid damper, and significantly enhances the inertia of the wall by generating a resistance proportional to the relative acceleration between the end points, and can adjust the inertia coefficient in real time according to the earthquake response to optimize the performance of the tuned self-resetting wall structure system, so that it can better adapt to different earthquake actions and building structure requirements. In this embodiment, a ball screw inertia container is preferably used;

[0046] The variable stiffness element 4 is selected from a spring or a magnetorheological elastomer, and can adjust the stiffness value in real time according to the earthquake response to optimize the performance of the tuned self-resetting wall structure system so that it can better adapt to different earthquake effects and building structure requirements. In this embodiment, a spring is preferred;

[0047] The variable damping element 5 is selected from an oil damper, an eddy current damper or a magnetorheological damper, and can adjust the damping coefficient in real time according to the earthquake response to optimize the performance of the tuned self-resetting wall structure system so that it can better adapt to different earthquake effects and building structure requirements. In this embodiment, an eddy current damper is preferably used;

[0048] The buffer element 7 is selected from a rubber buffer, a metal spring buffer or an air buffer, and in this embodiment, a rubber buffer is preferred;

[0049] The additional damping element 8 is selected from a viscous damper or an air spring, and in this embodiment, is preferably an air spring;

[0050] The shape, height and connection of the self-resetting wall 2 can be adjusted according to the specific building structure and earthquake action to achieve the desired optimal control performance without significantly affecting the beauty and function of the building;

[0051] The connection position between the self-resetting wall 2 and the floor 11 of the main structure 1 is selected according to the building structure characteristics and seismic requirements to achieve the best seismic toughness improvement effect;

[0052] The self-resetting wall 2 is made of high-strength and high-toughness materials, which are selected from steel, reinforced concrete, fiber-reinforced composite materials (FRP) or high-performance concrete to meet the requirements of earthquake resistance and self-resetting, and ensure sufficient strength and rigidity while maintaining appropriate mass to provide the required inertia effect. In this embodiment, steel is preferred;

[0053] The material of the protection frame 6 is selected from steel, wood or concrete, and in this embodiment, steel is preferred.

[0054] This embodiment provides a tuned self-resetting wall structure system for improving the seismic toughness of existing buildings. The core of the system is that the self-resetting wall 2 is connected to the main structure 1 through a variable stiffness element 4 and a variable damping element 5, and the vibration energy of the main structure 1 is transferred to the self-resetting wall 2. The variable inertia element 3 increases the inertia of the self-resetting wall 2, so that the self-resetting wall 2 can better resist vibration under the action of an earthquake. At the same time, the variable inertia element 3, the variable stiffness element 4 and the variable damping element 5 are tuned according to the seismic response, and the seismic response of the main structure 1 is controlled by various means such as energy dissipation and shock absorption and self-reset. The synergistic effect of the protection frame 6, the buffer element 7 and the additional damping element 8 ensures the stability and flexibility of the self-resetting wall 2 during an earthquake, so that the entire tuned self-resetting wall structure system can effectively dissipate seismic energy, reduce the damage of earthquakes to existing buildings, and achieve a significant improvement in the seismic toughness of existing buildings.

[0055] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A tuned self-resetting wall structure system for improving the seismic toughness of existing buildings, characterized in that: The system comprises a self-resetting wall (2), a linear viscoelastic device, a protection frame (6), a buffer element (7) and an additional damping element (8). The self-resetting wall (2) is an external substructure of a main structure (1) and is connected in parallel with the main structure (1). The self-resetting wall (2) is connected to a foundation (12) of the main structure (1) through prestressed tendons. A protection frame (6) is arranged on the outside of the bottom of the self-resetting wall (2). The protection frame (6) is fixed on the foundation (12) of the main structure (1). Both sides of the self-resetting wall (2) are connected to a floor slab (11) of the main structure (1) through a linear viscoelastic device. The linear viscoelastic device adopts one or more of a variable inertia element (3), a variable stiffness element (4) and a variable damping element (5) in parallel. A buffer element (7) is arranged on the inner side of the protection frame (6). The self-resetting wall (2) is connected to the protection frame (6) through an additional damping element (8).

2. A tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 1, characterized in that: The parts of the self-resetting wall (2) on both sides symmetrical to the non-protective frame (6) are horizontally connected to the floor slab (11) of the main structure (1) through a plurality of vertically parallel variable inertia elements (3), variable stiffness elements (4) or variable damping elements (5).

3. A tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 1, characterized in that: One side of the self-resetting wall (2) is horizontally connected to the floor slab (11) of the main structure (1) through a variable inertia element (3), a variable stiffness element (4) or a variable damping element (5) at the part where the protection frame (6) is set, and the other side is horizontally connected to the floor slab (11) of the main structure (1) through another variable inertia element (3), a variable stiffness element (4) or a variable damping element (5) at the part where the protection frame (6) is set.

4. A tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 3, characterized in that: A buffer element (7) is arranged inside the vertical frame of the protection frame (6), the output end of the additional damping element (8) is fixedly connected to the center of the self-resetting wall (2), and the fixed end is fixedly connected to the horizontal frame of the protection frame (6).

5. A tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 4, characterized in that: The cross frame of the protection frame (6) is located between the floors (11) of adjacent main structures (1), and the cross frame of the protection frame (6) on which the additional damping element (8) is arranged is adjacent to the floor (11) of the main structure (1) in which the linear viscoelastic device is arranged in the protection frame (6).

6. A tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 1, characterized in that: The two ends of the variable stiffness element (4) are respectively fixedly connected to one side of the self-resetting wall (2) and the floor slab (11) of the main structure (1); the output end of the variable inertia element (3) or the variable damping element (5) is fixedly connected to one side of the self-resetting wall (2), and the fixed end is fixedly connected to the floor slab (11) of the main structure (1).

7. A tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 1, characterized in that: The variable inertia element (3) is selected from a rack-driven wheel-flywheel inertia container, a ball screw inertia container, an electromagnetic damper or a fluid damper.

8. The tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 1 is characterized in that: The variable stiffness element (4) is selected from a spring or a magnetorheological elastomer.

9. A tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 1, characterized in that: The variable damping element (5) is selected from an oil damper, an eddy current damper or a magnetorheological damper.

10. The tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 1, characterized in that: The buffer element (7) is selected from a rubber buffer, a metal spring buffer or an air buffer, and the additional damping element (8) is selected from a viscous damper or an air spring.

Images