A tuned self-centering wall structure system for improving seismic resilience of existing buildings

Abstract

The application relates to a tuned self-resetting wall structure system for improving the seismic toughness of an existing building, which comprises a self-resetting wall, a linear viscoelastic device, a protective frame, a buffer element and an additional damping element, the self-resetting wall is an external substructure of a main structure and is connected in parallel with the main structure, the self-resetting wall is connected with the foundation of the main structure through prestressed tendons, a protective frame is arranged at the bottom of the self-resetting wall on the outer side, the protective frame is fixed on the foundation of the main structure, the two sides of the self-resetting wall are connected with the floor slab of the main structure through the linear viscoelastic device, the linear viscoelastic device is connected in parallel with one or more of a variable inerter element, a variable stiffness element and a variable damping element, the inner side of the protective frame is provided with the buffer element, and the self-resetting wall is connected with the protective frame through the additional damping element. Compared with the prior art, the application improves the seismic toughness of the existing building under the action of an earthquake, reduces the damage of the earthquake to the building structure, and realizes the automatic resetting of the wall after the earthquake.

Description

Technical Field

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

[0002] It is crucial for buildings to maintain a certain level of functional integrity and safety after natural disasters, human damage, and the ability to quickly recover and adapt after external shocks such as these. In recent years, earthquakes have been frequent, and traditional earthquake-resistant building structures can suffer severe damage, leading to high post-earthquake repair costs. Based on recent earthquake damage experience, current earthquake-resistant design methods face the following practical challenges:

[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 uses tuned mass dampers, which are generally installed on the top of the structure, but 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. The system comprises a main structure and a movable substructure. The upper portion of the movable substructure is connected to the main structure via a node that provides torsional or translational stiffness, while the lower portion of the movable substructure is connected to the ground via an energy-absorbing component. However, the patent's energy-absorbing method is relatively simple, with limited adaptability to different earthquake effects. Furthermore, if the movable substructure swings excessively, it is difficult to return to its original position and requires repair after an earthquake.

[0006] Patent CN112982730A discloses a self-resetting wall with a tuned-swing-friction composite graded energy dissipation function. The wall is composed of a precast wall, steel strands, long and short metal-rubber pads, air springs, sliding hinge supports, and an arc-shaped friction energy dissipation device. The precast wall's base is hinged via a sliding hinge support, and the air spring provides lateral stiffness. By adjusting the lateral stiffness provided by the air spring, the precast wall's swing frequency is controlled near the main structure's frequency, thereby achieving energy dissipation and vibration reduction. When the seismic action is low, the tuned mass damper formed by the precast wall performs the swing energy dissipation and vibration reduction. When the seismic action is high, while the precast wall swings, the friction plates in the arc-shaped friction energy dissipation device engage and begin to dissipate friction energy. However, the patent's structure is relatively complex, involving multiple connection devices such as steel strands, sliding hinge supports, metal-rubber pads, air springs, and the arc-shaped friction energy dissipation device composed of various metal plates, arc-shaped friction plates, and arc-shaped smooth plates. Furthermore, its adaptability to different seismic actions is limited. Summary of the Invention

[0007] The present application aims to overcome at least one of the above-mentioned defects of the prior art and provides a tuned self-centering wall structure system for improving the seismic resilience of existing buildings.

[0008] The object of the present application can be achieved by the following technical solutions:

[0009] One of the technical solutions of the present application is to provide a tuned self-centering wall structure system for improving the seismic resilience of existing buildings, which comprises a self-centering wall, a linear viscoelastic device, a protective frame, a buffer element and an additional damping element. The self-centering wall is an external substructure of the main structure and is connected in parallel with the main structure. The self-centering wall is connected to the foundation of the main structure through prestressed tendons. A protective frame is arranged on the outside of the bottom of the self-centering wall and is fixed to the foundation of the main structure. The protective frame prevents the self-centering wall from overturning and excessive swinging, ensuring that the linear viscoelastic device always remains within the linear elastic range. The two sides of the self-centering wall are connected to the floor of the main structure through the linear viscoelastic device. This connection allows the self-centering wall to independently self-center relative to the main structure under the action of an earthquake, thereby absorbing and dissipating seismic energy. The linear viscoelastic device allows the self-centering wall to generate a damping force during self-centering, which helps to reduce the self-centering amplitude of the self-centering wall and provides the necessary energy dissipation. The linear viscoelastic device is connected in parallel with one or more of a variable inertial element, a variable stiffness element and a variable damping element. The variable inertial element is attached to the self-centering wall to enhance the inertial effect of the tuned self-centering wall structure system, significantly increasing the additional inertia of the tuned self-centering wall structure system, enabling the tuned self-centering wall structure system to generate greater inertial force under the action of an earthquake, thereby improving the dynamic response capability of the tuned self-centering wall structure under the action of an earthquake and further absorbing and dissipating seismic energy. The variable stiffness element adjusts the stiffness value to adapt to different seismic actions and building structure requirements, thereby optimizing the performance of the tuned self-centering wall structure system. The variable damping element adjusts the damping coefficient to control the vibration amplitude of the self-centering wall, reducing the transfer of energy and thereby improving the seismic performance of the structure. The inner side of the protective frame is provided with a buffer element that prevents excessive travel of the self-centering wall and ensures that the linear viscoelastic device remains within the linear elastic range. This is particularly important for self-centering walls with hinged connections, as the stability of the self-centering wall would be compromised if the linear viscoelastic device fails. The self-centering wall is connected to the protective frame through an additional damping element, which can provide additional support and stability, ensuring that the self-centering 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, which can provide 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-resetting wall from over-travel and 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 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-resetting wall, and the fixed end is fixedly connected to the horizontal frame of the protection frame. This design of the output end being connected to the self-resetting wall helps to improve the stability and seismic performance of the self-resetting 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-resetting 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-resetting wall, and the fixed end is fixedly connected to the floor slab of the main structure. This design of the output end being connected to the self-resetting wall helps to improve the stability and seismic resistance of the self-resetting wall.

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

[0017] Furthermore, the variable stiffness element is selected from a spring or a magnetorheological elastomer, which 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 required optimal control performance without significantly affecting the beauty and function 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, high-toughness materials, which are selected from steel, reinforced concrete, fiber-reinforced composites (FRP) or high-performance concrete to meet the requirements of seismic resistance and self-resetting, and ensure sufficient strength and stiffness 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 self-resetting wall structures, the present invention achieves a greater mass transfer effect 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, thereby 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 relative to the main structure under earthquake action, 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 earthquake action 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 post-earthquake repair work;

[0028] (4) In the present invention, the tuned self-resetting wall structure controls the seismic response of the main structure through various means such as 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 earthquakes; the materials and designs of the variable inertia elements, variable stiffness elements and variable damping elements can be adjusted according to the specific building structure and seismic action to achieve optimal control performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the overall structure of a tuned self-resetting wall structure system for improving the seismic resilience of existing buildings in an embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the bottom structure of a tuned self-resetting wall structure system for improving the seismic resilience of existing buildings in an embodiment of the present invention;

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

[0032] Description of the marks 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 with reference to specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and 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," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, used to describe common objects, merely refer to different instances of the same object and are not intended to imply that the objects described must be in a given order, whether temporally, spatially, sequentially, or in any other manner.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] Example:

[0038] A tuned self-resetting 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 provided 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. The two 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 the variable inertia element 3, the variable stiffness element 4 and the 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-righting wall structure system is enhanced, and the additional inertia of the tuned self-righting wall structure system is significantly increased, so that the tuned self-righting wall structure system can generate a greater inertial force under earthquake action, thereby improving the dynamic response capability of the tuned self-righting wall structure under earthquake action, and further absorbing and dissipating 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-righting wall structure system. The variable damping element 5 controls the vibration amplitude of the self-righting wall 2 by adjusting the damping coefficient, reducing energy transfer, thereby improving the seismic performance of the structure. A buffer element 7 is provided on the inner side of the protection frame 6. The buffer element 7 prevents the self-righting wall 2 from overtravel and ensures that the linear viscoelastic device remains within the linear elastic range. This is especially important for the self-righting wall 2 with a hinged connection, because if the linear viscoelastic device fails, the stability of the self-righting wall 2 will be threatened. The self-righting 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-righting wall 2 can be smoothly reset under earthquake action.

[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 two sides of the self-resetting wall 2 are symmetrically connected to the floor 11 of the main structure 1 through multiple vertically parallel variable inertia elements 3, variable stiffness elements 4 or variable damping elements 5 in the part without the protective frame 6, which can provide diversified adjustment options to adapt to different seismic actions and building structure requirements, and in this embodiment, preferably three vertically parallel variable stiffness elements 4, variable inertia elements 3 and variable stiffness elements 4, 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 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 in the part with the protective frame 6, and the other side is connected to the floor 11 of the main structure 1 through another variable inertia element 3, variable stiffness element 4 or variable damping element 5 in the part with the protective frame 6, which can provide diversified adjustment options to adapt to different seismic actions and building structure requirements, and in this embodiment, preferably three vertically parallel variable damping elements 5 on one side and three vertically parallel variable stiffness elements 4 on the other side, which can realize asymmetric connection on both sides to adapt to different seismic action directions and building structure characteristics;

[0042] The two ends of the variable stiffness element 4 are fixedly connected to one side of the self-resetting wall 2 and the floor 11 of the main structure 1 respectively, and 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, which helps to improve the stability and seismic performance of the self-resetting wall 2;

[0043] The inside of the vertical frame of the protective frame 6 is provided with a buffer element 7, which can prevent the self-resetting wall 2 from excessive travel, ensure that the connection 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 reset smoothly under the action of earthquakes, and in this embodiment, the inside of the top of the vertical frame of the protective frame 6 is provided with a buffer element 7, 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 horizontal frame of the protective frame 6, which helps to improve the stability and seismic performance of the self-resetting wall 2, and in this embodiment, the fixed end is fixedly connected to the upper side of the horizontal frame of the protective frame 6;

[0044] The cross frame of the protective frame 6 is located between the floors 11 of 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 protective frame 6 on which the additional damping element 8 is provided is adjacent to the floor 11 of the main structure 1 on which the linear viscoelastic device is provided within the protective frame 6. In this embodiment, the cross frame of the protective frame 6 on which the additional damping element 8 is provided is located above the floor 11 of a specific floor of the main structure 1 on which three vertically parallel variable damping elements 5 are provided on one side and three vertically parallel variable stiffness elements 4 on the other side within the protective frame 6.

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

[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 seismic response to optimize the performance of the tuned self-resetting wall structure system so that it can better adapt to different seismic actions 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 is preferably a rubber buffer in this embodiment;

[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 aesthetics and functionality 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 plastics (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 preferably used;

[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, which transfers the vibration energy of the main structure 1 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-resetting. 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 caused by earthquakes to existing buildings, and achieve a significant improvement in the seismic toughness of existing buildings.

[0055] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. 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 resilience 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 provided 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 provided 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. The tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 1 is characterized in that: One side of the self-resetting wall (2) is horizontally connected to the floor slab (11) of the main structure (1) at the portion where the protection frame (6) is provided through a variable inertia element (3), a variable stiffness element (4) or a variable damping element (5), and the other side of the self-resetting wall (2) is horizontally connected to the floor slab (11) of the main structure (1) at the portion where the protection frame (6) is provided through another variable inertia element (3), a variable stiffness element (4) or a variable damping element (5).

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 provided 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. The tuned self-resetting wall structure system for improving the seismic toughness of existing buildings according to claim 1 is 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. 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 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. 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 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.

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