Adjustable energy dissipation self-resetting device

Abstract

The utility model discloses an adjustable energy dissipation self-resetting device which comprises a group of spring supports arranged between an upper structure and a foundation. The spring support is a support which only generates vertical displacement and turning, and the spring support is arranged at the joint of a column body of the upper structure and a foundation; the rigidity of the spring support is differently arranged corresponding to the swing track of the upper structure. Through the arrangement of the spring support, the energy dissipation reset of the upper structure is ensured; through setting of different rigidities of the spring device, setting according to the swing track of the upper structure is facilitated, and energy consumption and self-resetting of the structure can be further guaranteed; and through the rigidity setting of the spring supports in the core area and the peripheral area, the shock resistance of different upper structures can be adjusted and realized.

Description

Technical Field

[0001] The utility model relates to the technical field of building energy dissipation, and particularly relates to an adjustable energy dissipation and self - resetting device. Background Technique

[0002] The recoverable - function aseismic structural system has been a research hotspot in the field of earthquake engineering in recent years. The design goal of this structural system is to enable the building to maintain an acceptable functional level during an earthquake and require no complex repair or only minor repair after the earthquake to restore its service function. The proposal of this design concept is based on improving the seismic resilience of urban buildings and infrastructure and reducing the economic losses and social impacts brought by earthquake disasters.

[0003] With the development of urban economy, the urban population is dense and land is expensive, and there are more and more high - rise and super - high - rise buildings. For such building structures with a large aspect ratio of height to width, both seismic design and isolation design show certain limitations. The recoverable - function aseismic structure applies technologies such as rocking, self - resetting, replaceable and additional energy - dissipation devices, and can maintain an acceptable functional level under earthquake (fortified or rare) actions. The self - resetting structure can reduce the response of the structure during an earthquake and the residual deformation after the earthquake. The hysteresis curve of the structure under cyclic loading is approximately "flag" - shaped. Therefore, the lateral displacement at the top of the structure can gradually return to zero after the external force is removed. At the same time, the rocking of the structure can reduce the earthquake action and increase the ductility design requirements of the structure itself, reduce earthquake damage and save the structural cost. The performance - based seismic design is shifting towards the direction of recoverable - function aseismic design.

[0004] In summary, through scientific research and technological innovation, improving the seismic resilience and recovery ability of building structures and providing a device that can rock under earthquake action and has small residual deformation after the earthquake are problems that need to be urgently solved by those skilled in the art at present. Content of the Utility Model

[0005] The utility model provides an adjustable energy dissipation and self - resetting device to solve technical problems such as the setting, distribution and stiffness adjustment setting of the adjustable energy dissipation and self - resetting device.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] An adjustable energy dissipation and self - resetting device includes a group of spring bearings arranged between the upper structure and the foundation;

[0008] The spring bearing is a bearing that only has vertical displacement and rotation, and the spring bearings are arranged at the connection between the columns of the upper structure and the foundation; among them, the stiffness of the spring bearings is set according to the difference in the rocking trajectory of the upper structure.

[0009] Furthermore, the upper structure is a slender high-rise or super high-rise frame structure or a frame-shear wall structure.

[0010] Furthermore, the upper structure includes an upper beam body and an upper column body. The upper beam body is arranged in a layered grid pattern, and the upper column body is connected to the intersection points of the upper beam body; a spring support is provided at the bottom of each corresponding upper column body.

[0011] Furthermore, the height-width ratio and stiffness ratio of the upper structure meet the requirements of the swing reset deformation of the upper structure.

[0012] Furthermore, during the normal use stage, the spring support is set in a compressed state, and its stiffness design meets the requirement of bearing the vertical load of the upper structure;

[0013] Under the action of the seismic horizontal force, the allowable vertical lifting displacement of the spring support is to limit the swing amplitude of the upper structure in the tension state.

[0014] Furthermore, the spring support is divided into a core area and a peripheral area according to the upper column body of the upper structure. The core area is located at the central part of the upper building, and the peripheral area is the peripheral area of the central part.

[0015] Furthermore, the stiffness of the spring support in the core area is greater than that of the spring support in the peripheral area.

[0016] Furthermore, the stiffness of the spring support in the core area is equal to that of the spring support in the peripheral area.

[0017] The beneficial effects of the present utility model are reflected in:

[0018] With the setting of the spring support in the present utility model, it is beneficial to ensure the energy dissipation and reset of the upper structure; and through the setting of different stiffnesses of the spring device, it is beneficial to be set according to the swing trajectory of the upper structure, which can further ensure the energy consumption and self-reset of the structure; through the stiffness setting of the spring supports in the core area and the peripheral area, it is beneficial to adjustably realize the seismic resistance of different upper structures. Other features and advantages of the present utility model will be described in the subsequent specification, and will be partially obvious from the specification, or understood by implementing the present utility model; the main purpose and other advantages of the present utility model can be achieved and obtained through the solutions specifically pointed out in the specification. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the connection structure of the spring support, the upper structure and the foundation;

[0020] Figure 2 is a schematic diagram of the position distribution of the spring support;

[0021] Figure 3 is a schematic diagram of the plane area division of the spring support;

[0022] Figure 4 It is a schematic diagram of the rocking trajectory of the rocking motion under the action of the structural horizontal seismic force Figure 1 ;

[0023] Figure 5 It is a schematic diagram of the rocking trajectory of the rocking motion under the action of the structural horizontal seismic force Figure 2 .

[0024] Reference numerals: 1 - spring support, 2 - superstructure, 21 - upper column, 22 - upper beam, 3 - foundation, 4 - core area, 5 - peripheral area. Specific implementation mode

[0025] Taking a certain frame structure as an example, as Figures 1 to 5 shown, the adjustable energy dissipation and self - reset device includes a superstructure 2, a foundation 3, and a spring support 1 connected between the superstructure 2 and the foundation 3; the superstructure 2 is a slender high - rise, super - high - rise frame structure or a frame - shear wall structure.

[0026] In this embodiment, the spring support 1 is a support that only undergoes vertical displacement and rotation, and the spring supports 1 are arranged at the joints between the columns of the superstructure 2 and the foundation 3; among them, the stiffness of the spring support 1 is set differently according to the rocking trajectory of the superstructure 2.

[0027] Under the action of the seismic horizontal force, it allows the bottom of the superstructure 2 to have a vertical displacement at the support layer, and the spring support 1 will not generate sliding in any direction within the plane relative to the foundation 3, strictly restricting the in - plane displacement of the superstructure 2 at the support layer. Under the action of the earthquake, the superstructure 2 generates an overall rocking motion of the structure.

[0028] In this embodiment, by endowing the elastic damping elements in the spring supports 1 at each position of the spring support 1 layer with different tensile stiffnesses, the rocking amplitude and rocking trajectory of the superstructure 2 under the action of the earthquake are adjusted to make it a controllable rocking mechanism.

[0029] In this embodiment, the superstructure 2 includes an upper beam 22 and an upper column 21. The upper beam 22 is arranged in a layered grid pattern, and the upper column 21 is connected to the intersection points of the upper beam 22; a spring support 1 is provided at the bottom of each corresponding upper column 21.

[0030] In this embodiment, the height - width ratio and stiffness ratio of the superstructure 2 adapt to the rocking and reset deformation requirements of the superstructure 2; among them, the height - width ratio is the ratio of the height of the superstructure 2 to the width of the superstructure 2; the stiffness ratio is the ratio of the rotational stiffness of the superstructure 2 to the rotational stiffness of the spring support 1. The stiffness of the superstructure 2 is the force required to generate a unit displacement at the top; the greater the stiffness of the superstructure 2, the greater its ability to resist its own deformation.

[0031] In this embodiment, the spring support 1 includes an elastic shock-absorbing element and a damping element. The spring support 1 is a support that provides vertical asymmetric tension and compression stiffness and tension and compression bearing capacity. During the normal use stage, the spring support 1 is arranged in a compressed state; the stiffness design of the elastic shock-absorbing element meets the requirement of bearing the vertical load of the upper structure 2; under the action of the seismic horizontal force, the allowable vertical lifting displacement of the spring support 1 limits the sway amplitude of the upper structure 2 in the tension state.

[0032] In this embodiment, the stiffness distribution of the spring support 1 is arranged according to the proportion of the rigid body rotation displacement, and the plane distribution of its stiffness setting corresponds to the designed control sway trajectory; among them, the proportion of the rigid body rotation displacement is the ratio of the displacement caused by the rigid body rotation in the lateral displacements of each floor when the upper structure 2 sways to the total displacement. The larger this value is, the lower the damage and the better the self-centering function of the upper structure 2.

[0033] In this embodiment, the spring support 1 is divided into a core area 4 and a peripheral area 5 according to the upper columns 21 of the upper structure 2 respectively. Among them, the core area 4 is located at the center of the upper building, and the peripheral area 5 is the peripheral area of the center part. Different tensile stiffnesses are given to the elastic shock-absorbing elements in the spring support 1 to correspondingly adjust the sway displacement and amplitude of the upper structure 2.

[0034] In the first embodiment, for the spring support 1 in the core area 4 of the support layer plane, a relatively large stiffness is given to the internal elastic shock-absorbing element, and the stiffness of the internal elastic shock-absorbing element of the spring support 1 in the peripheral area 5 is relatively small; the spring support 1 provides vertical asymmetric tension and compression stiffness and tension and compression bearing capacity. During the normal use stage, the spring support 1 is in a compressed state, and the stiffness design of the elastic shock-absorbing element meets the requirement of bearing the vertical load of the upper structure 2. Under the action of the seismic horizontal force, the spring support 1 allows the bottom of the upper structure 2 to have a vertical lifting displacement, and the support is in a tension state to limit the sway amplitude of the upper structure 2.

[0035] Therefore, the controllable energy-dissipating rocking self-centering structural system provided by this embodiment can rock during a strong earthquake. The bottom spring support 1 provides asymmetric vertical tension and compression stiffness and vertical tension and compression bearing capacity, which can avoid the formation of plastic hinges in the column-foot node structure and the beam-end node structure. For the spring support 1 near the centroid of the support layer plane, a relatively large stiffness is given to the internal elastic shock-absorbing element, and the stiffness of the internal elastic shock-absorbing element of the spring support 1 far from the centroid of the plane is relatively small, so that the rocking trajectory of the overall structure under the action of the seismic force level can be realized as Figure 4 shown, where the two opposite arrows represent the compressed and tensioned states, and the opposite arrows represent the tensioned state.. The structure has strong stability and a strong self-centering ability. There is no damage or slight damage at the node after the earthquake, and it can be put into use without repair, and can be widely applied to various recoverable functional building structures.

[0036] In Embodiment 2, the stiffness of the elastic shock-absorbing elements in the spring bearings 1 in the core area 4 and the peripheral area 5 of the bearing layer is the same, and the swinging trajectory under the action of the seismic horizontal force is as shown in Figure 5 ; among them, the opposite arrows indicate that the spring bearing 1 in the tension state provides vertical asymmetric tensile and compressive stiffness and tensile and compressive bearing capacity. In the normal use stage, the spring bearing 1 is in the compressed state, and the stiffness design of the elastic shock-absorbing element meets the requirement of bearing the vertical load of the upper structure 2. Under the action of the seismic horizontal force, the spring bearing 1 allows the bottom of the upper structure 2 to have a vertical uplift displacement, and the bearing is in the tension state to limit the swinging amplitude of the upper structure 2.

[0037] In the above embodiments, the spring bearing 1 can achieve the self-resetting function and the energy dissipation function. They have the ability to automatically return to their original state after being subjected to external forces (such as earthquakes or wind loads). The elastic shock-absorbing elements in the spring bearing 1 can absorb and dissipate seismic energy through their elastic deformation, reducing the transmission of seismic energy to the upper structure 2.

[0038] It should be noted that the two provided controllable energy-dissipating rocking self-resetting structural systems have a controllable rocking mechanism. The stiffness values assigned to the spring bearings 1 at different positions in the plane of the bearing layer are different, and the rocking trajectories of the upper structure 2 during rocking motion under earthquake action are different. Therefore, by assigning different stiffness values to the elastic shock-absorbing elements in the spring bearings 1 at different positions in the bearing layer, the rocking amplitude and rocking trajectory of the upper structure 2 are designed and controlled to achieve the controllable rocking mechanism.

[0039] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. An adjustable energy dissipation self-resetting device, characterized in that: It includes a set of spring supports disposed between the superstructure and the foundation; The spring support is a support that only undergoes vertical displacement and rotation, and is arranged at the connection between the column and the foundation of the upper structure; wherein the stiffness of the spring support is set differently corresponding to the swing trajectory of the upper structure.

2. An adjustable energy dissipation self-resetting device as claimed in claim 1, characterized in that: The upper structure is a slender high-rise, super-high-rise frame structure or a frame shear wall structure.

3. An adjustable energy dissipation self-resetting device as claimed in claim 2, characterized in that: The upper structure comprises an upper beam and an upper column. The upper beam is arranged in a layered grid shape, and the upper column is connected to the intersection of the upper beam. A spring support is arranged at the bottom of each upper column.

4. The adjustable energy dissipation self-resetting device according to claim 1, characterized in that: The aspect ratio and stiffness ratio of the superstructure are adapted to the superstructure's rocking and restoring deformation requirements.

5. The adjustable energy dissipation self-resetting device according to claim 1, characterized in that: During normal use, the spring support is set in a compressed state, and its stiffness design meets the requirements of bearing the vertical load of the superstructure; Under the action of earthquake horizontal force, the allowable vertical lifting displacement of the spring support is in a tensile state to limit the sway amplitude of the superstructure.

6. The adjustable energy dissipation self-resetting device according to claim 1, characterized in that: The spring support is divided into a core area and a peripheral area according to the upper column of the upper structure, wherein the core area is located at the central part of the upper structure, and the peripheral area is the peripheral area of ​​the central part.

7. An adjustable energy dissipation self-resetting device as claimed in claim 6, characterized in that: The stiffness of the spring supports in the core region is greater than the stiffness of the spring supports in the peripheral region.

8. An adjustable energy dissipation self-resetting device as claimed in claim 6, characterized in that: The stiffness of the spring supports in the core region is equal to the stiffness of the spring supports in the peripheral region.

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