Full-elastic self-resetting energy dissipation shear wall

Abstract

The invention discloses a full-elastic self-resetting energy dissipation shear wall, and belongs to the technical field of structural engineering. The full-elastic self-resetting energy dissipation shear wall is formed by connecting a fishplate and a plurality of layers of shear block units, reciprocating loading of the full-elastic self-resetting energy dissipation shear wall is achieved through a baffle on a frame, and each shear block unit is composed of a connecting sliding block and a plurality of anti-shear subunits. The shearing block units are connected with each other through the sliding grooves between the connecting sliding blocks. The anti-shearing unit comprises but is not limited to an inclined straight beam unit, a bent beam unit and various rod system units. The anti-shearing unit can keep full-elastic work in the loading and unloading process through parameter regulation and control and has the self-resetting capacity. The full-elastic self-resetting energy dissipation shear wall has the characteristics of low damage, high assembly and self-resetting through customization, the anti-seismic level of a building is improved, the city toughness is improved, and the maintenance cost of the structure and the post-earthquake repair cost are remarkably reduced.

Description

Technical Field

[0001] The present invention relates to a fully elastic self - resetting energy - dissipating shear wall, belonging to the technical field of structural engineering. Technical Background

[0002] In recent years, with the significant increase in high - density population gathering areas and infrastructure construction, the vulnerability of cities in the face of natural disasters such as earthquakes and typhoons has also increased. Therefore, the resilience of structures has been emphasized in urban construction. As a common energy - dissipation and seismic - reduction means, shear walls are widely used in structures to meet the requirements of seismic fortification. However, traditional shear walls have large residual deformations after earthquakes, which brings inconvenience to post - earthquake repair. Traditional reinforced concrete shear walls rely on material damage mechanisms such as concrete cracking and steel bar yielding to dissipate seismic energy. Although the energy - dissipation capacity of the structure is improved, this damage is irreversible, resulting in large - scale repair or even demolition after earthquakes. In addition, the accumulation of plastic deformation in shear walls is likely to produce large residual deformations, making it difficult for buildings to return to their original state after earthquakes and affecting their normal use functions.

[0003] To overcome the problem of residual deformation of structures after earthquakes, researchers have proposed a series of self - resetting shear wall systems. For example, prestressed tendons are used to provide restoring forces, enabling the shear wall to return to its initial position after earthquakes, while energy - dissipating elements (such as metal dampers, viscous dampers, etc.) are used to absorb seismic input energy. However, although such shear walls reduce residual deformations to a certain extent, they still rely on material damage mechanisms to achieve energy dissipation, resulting in the need to replace dampers after earthquakes, and the performance of dampers will decay during long - term use, affecting the long - term seismic performance of the structure.

[0004] In view of the above problems, it is necessary to design a fully elastic self - resetting energy - dissipating shear wall, which has the characteristics of low damage, self - resetting while ensuring excellent energy - dissipation and seismic - reduction levels of the structure, improving the degree of prefabrication of construction, and reducing construction costs. Summary of the Invention

[0005] To improve the seismic resilience of the structure, enable the structure to effectively dissipate seismic energy while eliminating residual deformations, avoid plastic damage to main components, and at the same time overcome problems such as large rigidity and non - recoverable deformation existing in traditional shear walls, the present invention provides a fully elastic self - resetting energy - dissipating shear wall.

[0006] The fully elastic self - resetting energy - dissipating shear wall of the present invention is formed by connecting a fish - tail plate and a plurality of shear block units. The shear block unit is composed of a connecting slider and a plurality of parallel shear - resistant units. On both sides of the connecting slider are respectively a groove and a convex block; there are a plurality of notches on both sides of the connecting slider for fixing the parallel shear - resistant units.

[0007] Furthermore, a fully elastic self - resetting energy - dissipating shear wall includes:

[0008] Two energy dissipation modules;

[0009] A baffle arranged between the two energy dissipation modules;

[0010] The energy dissipation module includes:

[0011] A fishplate with grooves;

[0012] A fishplate with bumps;

[0013] A plurality of shear block units arranged between the fishplate with grooves and the fishplate with bumps;

[0014] The shear block unit is composed of a connecting slider and a plurality of parallel shear resistance units;

[0015] On both sides of the connecting slider are a groove and a bump respectively;

[0016] On both the groove side and the bump side of the connecting slider are provided a plurality of notches. Inside the notches on the groove side of the connecting slider are fixed a plurality of parallel shear resistance units;

[0017] Between two adjacent shear block units, the groove on the connecting slider in the previous shear block unit mates with the bump on the connecting slider in the next shear block unit;

[0018] Between two adjacent shear block units, the shear resistance units inside the notches on the groove side of the previous shear block unit are connected to the notches on the bump side of the connecting slider in the next shear block unit.

[0019] In the present invention, the fully elastic self - resetting energy - dissipating shear wall is composed of fishplates and multiple layers of shear block units connected. The fully elastic self - resetting energy - dissipating shear wall realizes reciprocating loading through the baffle on the frame. The shear block unit is composed of a connecting slider and multiple shear resistance sub - units. The shear block units are connected to each other through the sliding grooves between the connecting sliders. The shear resistance unit includes but is not limited to inclined straight beam units, curved beam units, and various rod - based units. The shear resistance unit can maintain fully elastic working and have self - resetting ability during the loading and unloading process through parameter regulation. The fully elastic self - resetting energy - dissipating shear wall proposed in the present invention has the characteristics of low damage, high prefabrication, and self - resetting through customization, which helps to improve the seismic performance of buildings, enhance urban resilience, and significantly reduce the maintenance cost and post - earthquake repair cost of structures.

[0020] Furthermore, the fully elastic self - resetting energy - dissipating shear wall realizes reciprocating loading through the baffle on the frame.

[0021] Further, the fishplate is divided into a fishplate with grooves and a fishplate with bumps. The fishplate with grooves is connected to the bump side of the shear block unit; the fishplate with bumps is connected to the groove side of the shear block unit. Further still, the shear block unit close to the fishplate with grooves cooperates with the groove of the fishplate with grooves through the bump of the connecting slider of the shear block unit. The shear block unit close to the fishplate with bumps cooperates with the bump of the fishplate with bumps through the groove of the connecting slider of the shear block unit. The two sides of the cross-section of the groove of the connecting slider are triangular, forming a limiting fit structure with the bump.

[0022] Further, adjacent shear block units are interconnected through grooves and bumps to form an integral lateral force resistance system.

[0023] Further, the shear resistance unit can be in the form of an inclined straight beam unit, a curved beam unit, various rod systems units, various shell units, etc.

[0024] Further, the shear resistance unit can be integrally formed by wire cutting technology or integrally formed by 3D printing technology.

[0025] Further, through parameter regulation, the shear resistance unit utilizes different equilibrium paths during the nonlinear structural loading and unloading process for full elastic energy dissipation, avoiding plastic damage to components.

[0026] Further, through parameter regulation, the shear resistance unit ensures that the structure maintains a single steady state during the loading and unloading process, enabling the structure to have self-resetting ability after loading.

[0027] Further, the material of the shear resistance unit can be selected as high-strength steel, carbon fiber reinforced composite material or other materials with excellent mechanical properties according to actual requirements, ensuring the stability and reliability of the structure during long-term use.

[0028] Further, the structural parameters of the shear wall (such as the length, stiffness, shape, etc. of the shear resistance unit) can be flexibly adjusted according to the load intensity and seismic load conditions to ensure the best performance under different seismic environments.

[0029] Further, the fully elastic self-resetting energy-dissipating shear wall is particularly suitable for earthquake engineering. As a part of the seismic structure, it can effectively reduce the vibration response of the building under seismic loads, reduce the damage caused by earthquakes, and ensure the long-term use stability of the structure.

[0030] The fully elastic self-resetting energy-dissipating shear wall proposed by the present invention has the following advantages:

[0031] (1) Low damage. During the loading and unloading process, the structure forms an energy dissipation area through a multi-modal equilibrium path. All shear-resistant units remain elastic throughout the process, avoiding damage to the damper during energy dissipation.

[0032] (2) Excellent self-centering performance. By adjusting the geometric parameters and types of shear-resistant units, it ensures the balanced switching between different modes during the energy dissipation process, thus achieving a good elastic self-centering effect.

[0033] (3) High degree of prefabrication. The shear wall has a high degree of prefabrication. Each component is processed in the factory, and the processing process realizes standardized and streamlined operations. The components can be directly assembled on the construction site.

[0034] (4) Stable energy dissipation effect. The present invention dissipates energy based on the hysteretic behavior of the elastic equilibrium path of the non-linear structure during the loading and unloading process, and has long-term reliability and stability under changes in environmental conditions.

[0035] (5) High economic efficiency. The fully elastic self-centering design reduces the long-term maintenance, repair, and replacement costs of the structure, and has high economic efficiency. Description of the Drawings

[0036] Figure 1 is a schematic diagram of the whole of the present invention;

[0037] Figure 2 is a schematic diagram of the structure of the shear block unit of the present invention;

[0038] Figure 3 is a schematic diagram of the structure of the gusset plate of the present invention;

[0039] Figure 4 is a simplified schematic diagram of the overall deformation of the present invention;

[0040] Figure 5 is the finite element simulation result of the fully elastic self-centering energy dissipation shear wall of the present invention;

[0041] Among them, 1 - gusset plate with bumps, 2 - gusset plate with grooves, 3 - shear block unit, 4 - baffle, 5 - connecting slider, 6 - shear-resistant unit. Detailed Embodiment

[0042] The following will describe in detail the embodiments of the present invention with reference to the drawings. The following is only the preferred embodiment of the present invention and does not limit the present invention.

[0043] The present invention provides a fully elastic self-centering energy dissipation shear wall, as Figure 1As shown in the figure, the shear wall is composed of a fishplate 1 with bumps, a fishplate 2 with grooves, and multiple shear block units 3 connected by the connection of bumps and grooves, forming an integral lateral force resistance system and reciprocally loaded through a baffle 4 installed on the frame. The shear block unit 3 is composed of a connecting slider 5 and multiple parallel shear units 6.

[0044] As Figure 2 shown, on both sides of the connecting slider 5 of the shear block unit 3 are respectively a bump and a groove. The groove is used to connect with the fishplate 2 with bumps or an adjacent unit, and the bump is used to connect with the fishplate 1 with grooves. Both sides of the connecting slider 5 are provided with multiple notches for fixing multiple parallel shear units 6.

[0045] The shear unit 6 can be an inclined straight beam unit, a curved beam unit, a shell unit or other bar system units. By adjusting the geometric parameters of the shear unit 6 (such as length, stiffness and shape), it can be ensured that the shear unit 6 maintains an elastic state during the loading and unloading processes, and the seismic energy is dissipated using the nonlinear equilibrium path, thereby avoiding plastic damage to the shear block unit 3.

[0046] By adjusting the geometric parameters of the shear unit 6 (such as length, stiffness and shape), a restoring force can always exist in the shear unit 6 during the loading and unloading processes.

[0047] As Figure 3 shown, the fishplates are divided into a fishplate 1 with bumps and a fishplate 2 with grooves. The fishplate 1 with bumps is connected to the groove side of the shear block unit 3, and the fishplate 2 with grooves is connected to the bump side of the shear block unit 3. The connection method of the bump and the groove of the fishplate 1 with bumps ensures the overall flexibility and lateral force resistance performance of the shear wall.

[0048] As Figure 1 、 Figure 2 and Figure 3 shown, multiple notches are provided on both the groove side and the bump side of the connecting slider 5. Multiple parallel shear units 6 are fixed in the notches on the groove side of the connecting slider 5; between two adjacent shear block units 3, the groove on the connecting slider 5 in the previous shear block unit 3 cooperates with the bump on the connecting slider 5 in the next shear block unit 3; between two adjacent shear block units 3, the shear unit 6 in the notch on the groove side of the previous shear block unit 3 is connected to the notch on the bump side of the connecting slider 5 in the next shear block unit 3. The shear block unit 3 close to the fishplate 2 with grooves is fitted with the groove of the fishplate 2 with grooves through the bump of the connecting slider 5 of the shear block unit 3. The shear block unit 3 close to the fishplate 1 with bumps is fitted with the bump of the fishplate 1 with bumps through the groove of the connecting slider 5 of the shear block unit 3.

[0049] During the implementation of the present invention, adjacent shear block units 3 are alternately connected by chutes and pins to form a continuous lateral force resistance system. The standardized design of the connection method facilitates prefabrication in the factory and rapid assembly on site.

[0050] In a preferred embodiment, the shear resistance unit 6 is made of high-strength steel or carbon fiber reinforced composite material, having high strength and excellent recovery ability. The shear resistance unit 6 can be integrally formed by wire cutting or 3D printing technology to ensure the processing accuracy and overall performance of the structure.

[0051] It should be noted that the design of the shear resistance unit 6 is not limited to the form of straight beams or curved beams, and other shapes or structural forms suitable for seismic load conditions can also be adopted to meet the requirements of different scenarios.

[0052] Figure 4 It shows the deformation schematic diagram of the shear wall under the action of reciprocating loads in the present invention.

[0053] Figure 5 It shows the finite element simulation mechanical simplified model of the present invention, and beam elements are used to simulate the shear resistance unit 6. The form of the shear resistance unit 6 is taken as an inclined straight beam.

[0054] Figure 5 The shown finite element simulation mechanical simplified model is composed of 12 layers of shear block units 3 connected in series, and each layer of shear block unit contains 12 shear resistance units 6. During the loading and unloading process, each layer of shear block unit undergoes nonlinear buckling in turn.

[0055] Figure 5 The shown finite element simulation load-displacement curve has multiple peaks and valleys, corresponding to the generation of nonlinear buckling of each layer of shear block unit 3. It further demonstrates the feasibility of the present invention to utilize different nonlinear buckling paths during the loading and unloading process for full-elastic self-centering energy dissipation.

[0056] The full-elastic self-centering energy dissipation shear wall provided by the present invention can effectively reduce the vibration response of the structure under earthquake action, and achieve low damage and good self-centering performance through optimized design.

[0057] Finally, it should be noted that the above description is only the preferred embodiment of the present invention and does not limit the protection scope of the present invention. Those skilled in the art can make changes or equivalent substitutions to the specific structural form or material selection without departing from the technical idea of the present invention, and these changes or substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A fully elastic self-resetting energy-absorbing shear wall, characterized in that: include: 2 energy consumption modules; A baffle (4) disposed between the two energy-consuming modules; The energy consumption module comprises: A grooved fishplate (2); Fishplate with protrusions (1); A plurality of shear block units (3) arranged between the fish plate with grooves (2) and the fish plate with protrusions (1); The shear block unit (3) is composed of a connecting slider (5) and a plurality of parallel-connected shear resistance units (6); The two sides of the connecting slider (5) are respectively provided with a groove and a convex block; A plurality of notches are provided on one side of the groove and one side of the protrusion of the connecting slider (5), and a plurality of parallel anti-shear units (6) are fixed in the notches on one side of the groove of the connecting slider (5); Between two adjacent shear block units (3), the groove on the connecting slider (5) in the upper shear block unit (3) cooperates with the protrusion on the connecting slider (5) in the lower shear block unit (3); Between two adjacent shear block units (3), the anti-shear unit (6) in the notch on one side of the groove of the previous shear block unit (3) is connected to the notch on one side of the protrusion connected to the slider (5) in the next shear block unit (3).

2. The fully elastic self-resetting energy-absorbing shear wall according to claim 1 is characterized in that: The shear-resistant unit (6) is an inclined straight beam unit, a curved beam unit or a shell unit.

3. The fully elastic self-resetting energy-absorbing shear wall according to claim 1 is characterized in that: The material of the shear-resistant unit (6) is spring steel or carbon fiber reinforced composite material.

4. The fully elastic self-resetting energy-absorbing shear wall according to claim 1 is characterized in that: The shear block unit (3) close to the fish plate (2) with the groove cooperates with the groove of the fish plate (2) with the groove through the protrusion of the connecting slide block (5) of the shear block unit (3).

5. The fully elastic self-resetting energy-absorbing shear wall according to claim 1 is characterized in that: The shear block unit (3) close to the fish plate (1) with the protrusion cooperates with the protrusion of the fish plate (1) with the protrusion through the groove of the connecting slide block (5) of the shear block unit (3).

6. The fully elastic self-resetting energy-absorbing shear wall according to claim 1 is characterized in that: The two sides of the cross section of the groove of the connecting slider (5) are triangular, forming a limiting matching structure with the protrusion.

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