A multi-stage behavior self-resetting friction sliding isolation device

Abstract

The application relates to the technical field of building anti-seismic structures, and particularly relates to a friction sliding component and a self-resetting device; the friction sliding component comprises an upper sliding plate and a lower sliding plate; the lower sliding plate is fixedly arranged; the upper sliding surface and the lower sliding surface are two intersecting trapezoidal corrugated surfaces; the trapezoidal corrugated surfaces are divided into horizontal sections and inclined wave sections; the initial positions of the upper sliding surface and the lower sliding surface are that the horizontal sections of the two sliding surfaces are in contact, and the inclined wave sections are not in contact; the self-resetting device comprises a reset component and a limiting side wall; the reset component comprises a guide rail, a sliding block and a compression spring; the guide rail is fixedly arranged on the top surface of the upper sliding plate; one sliding block is arranged at the two ends of the guide rail; the sliding blocks are connected through the compression spring; the limiting side walls are arranged on the two sides of the reset component; the outer sides of the sliding blocks are in sliding connection with the inner walls of the limiting side walls; the device can play the shock-reducing and isolating function of the shock-reducing and isolating support in different states in stages.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building anti-seismic structure, and particularly relates to a multi-stage self-resetting friction sliding isolation device. BACKGROUND

[0002] Seismic isolation technology is to install a seismic isolation bearing at the connection between the upper structure and the lower structure of a building, so as to reduce the seismic response of the structure by changing the structural period and damping.

[0003] The friction coefficient and the curvature radius of the traditional friction pendulum bearing are fixed values, and the damping and the stiffness provided by the bearing are also fixed values, so that the bearing cannot accurately identify the earthquake, and the damping performance of the friction pendulum bearing does not change significantly under different intensity earthquakes, and under rare and extremely rare earthquakes, the sliding amount of the friction pendulum bearing will exceed the designed effective sliding displacement, so that the bearing is damaged, and further causes the seismic damage of the structure.

[0004] Although the existing technology discloses a new friction pendulum bearing which has a certain damping self-adaptive adjustment capability and solves certain problems in actual engineering, the following problems still exist:

[0005] The limiting and resetting capability of the friction pendulum bearing is weak, and under the action of rare and extremely rare earthquakes, the bearing is easy to exceed the designed displacement deformation and be damaged.

[0006] When adapting to the temperature displacement of thermal expansion and cold contraction of the upper structure, the friction pendulum bearing inevitably has vertical uplift, so that the smoothness of the structure and the like upper structure is poor, and the damage of the expansion joint is easy to occur.

[0007] The temperature displacement of thermal expansion and cold contraction of the existing structure and the seismic displacement of the application of isolation are superimposed on each other, the friction coefficient of the friction pendulum bearing cannot be changed in the working process, so that the structure strain cannot be effectively released when the temperature displacement occurs, and the excellent seismic isolation effect cannot be achieved when the seismic displacement occurs. SUMMARY

[0008] The present application aims to provide a multi-stage self-resetting friction sliding isolation device, and aims to solve the problems in the prior art.

[0009] The embodiment of the application provides a multi-stage self-resetting friction sliding isolation device, which comprises a friction sliding assembly and a self-resetting device; the friction sliding assembly comprises an upper sliding plate and a lower sliding plate; the lower sliding plate is fixedly arranged; the bottom surface of the upper sliding plate and the top surface of the lower sliding plate are intersected and are respectively an upper sliding surface and a lower sliding surface; the upper sliding surface and the lower sliding surface are relatively slidable; the upper sliding surface and the lower sliding surface are two intersected trapezoidal corrugated surfaces; the trapezoidal corrugated surface is divided into a horizontal section and an inclined wave section; the initial position of the upper sliding surface and the lower sliding surface is that the horizontal sections of the two sliding surfaces are in contact, and the inclined wave sections are not in contact; the self-resetting device comprises a reset assembly and a limiting side wall; the reset assembly comprises a guide rail, a sliding block and a compression spring; the guide rail is fixedly arranged on the top surface of the upper sliding plate; one sliding block is arranged at the two ends of the guide rail; the sliding blocks are connected through the compression spring; the limiting side wall is arranged on the two sides of the reset assembly; the outer side of the sliding block is in sliding connection with the inner wall of the limiting side wall; and the limiting side wall is fixedly connected with the lower sliding plate.

[0010] Preferably, the upper sliding plate and the lower sliding plate are made of metal or rubber material; and a friction coating is attached to the upper sliding surface and the lower sliding surface.

[0011] Preferably, the inclined wave angles of the inclined wave sections of the trapezoidal corrugated surface are the same; and the inclined wave angle is 10°-80°.

[0012] Preferably, the compression spring is always in a compressed state.

[0013] Preferably, a trapezoidal protrusion is arranged on the limiting side wall; and the trapezoidal protrusions are symmetrically arranged on the limiting side walls on the two sides.

[0014] The application has the beneficial effect that: through the sliding of the upper sliding plate and the lower sliding plate on the contact surfaces of the horizontal section and the inclined wave section of the trapezoidal corrugated structure, the normal use function and the auxiliary function under the action of seismic load of the seismic isolation bearing can be distinguished, the seismic isolation function is exerted in stages, under the action of a small horizontal force, the upper and lower sliding surfaces only contact at the horizontal section, at this time, only the upper vertical load is transmitted between the upper sliding plate and the lower sliding plate, horizontal sliding or rotation occurs, the horizontal displacement of the upper structure caused by thermal expansion and cold contraction is balanced, and the self-resetting capability is achieved; when a large earthquake occurs, the two inclined wave sections are in contact, the upper sliding plate slides along the inclined wave section of the trapezoidal corrugated surface of the lower sliding plate to the upper side, the horizontal kinetic energy is converted into the potential energy of the upper structure, and part of the seismic energy is also consumed through the mutual friction on the contact surface; at this time, the friction bearing enters the kinetic energy and potential energy mutual conversion working stage from the horizontal sliding working stage. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the application.

[0016] Figure 2For Figure 1 A-A sectional view.

[0017] Figure 3 For Figure 1 B-B sectional view.

[0018] Figure 4 Structure diagram of the device in the initial position.

[0019] Figure 5 Structure diagram of the device under the action of a small horizontal force.

[0020] Figure 6 Structure diagram of the device under the action of a large horizontal force.

[0021] In the figure:

[0022] 1, upper sliding plate; 2, lower sliding plate; 3, upper sliding surface; 4, lower sliding surface; 5, horizontal section; 6, inclined wave section; 7, guide rail; 8, sliding block; 9, compression spring; 10, limiting side wall; 11, trapezoidal protrusion; 12, center line of the device in the initial position; 13, center line of the device after displacement. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] As Figures 1 to 3 shown, a multi-stage behavior self-resetting friction sliding isolation device includes a friction sliding assembly and a self-resetting device; the friction sliding assembly includes an upper sliding plate 1 and a lower sliding plate 2; the lower sliding plate 2 is fixedly arranged; the bottom surface of the upper sliding plate 1 and the top surface of the lower sliding plate 2 intersect to form an upper sliding surface 3 and a lower sliding surface 4, respectively; the upper sliding surface 3 and the lower sliding surface 4 are relatively slidable; the upper sliding surface 3 and the lower sliding surface 4 are two intersecting trapezoidal corrugated surfaces; the trapezoidal corrugated surfaces are divided into horizontal sections 5 and inclined wave sections 6; the initial position of the upper sliding surface 3 and the lower sliding surface 4 is that the horizontal sections 5 of the two sliding surfaces are in contact, and the inclined wave sections 6 are not in contact, as Figure 4 shown.

[0025] Figure 4In the upper sliding surface, there are 5 horizontal sections and 4 inclined sections; in the lower sliding surface, there are also 5 horizontal sections and 4 inclined sections; under the action of a small horizontal force, the sliding between the upper sliding plate 1 and the lower sliding plate 2 only occurs between the upper and lower horizontal sections, and the inclined sections are not in contact with each other; as the horizontal force continues to increase, the two inclined sections are in contact, and the upper sliding plate 1 can slide up or down along the inclined sections on the lower sliding plate; the horizontal distance between the inclined sections in the initial position can be optimized according to the size of the upper structure, the design seismic load, and the different requirements for the seismic performance of the support.

[0026] The self-resetting device comprises a reset assembly and a limiting side wall 10; the reset assembly comprises a guide rail 7, a sliding block 8, and a compression spring 9; the guide rail 7 is fixedly arranged on the top surface of the upper sliding plate 1; one sliding block 8 is arranged at each end of the guide rail 7; the sliding blocks 8 are connected by the compression spring 9; limiting side walls 10 are arranged on both sides of the reset assembly; the outer side of the sliding block 8 is in sliding contact with the inner wall of the limiting side wall 10; and the limiting side wall 10 is fixedly connected with the lower sliding plate 2.

[0027] The upper sliding plate 1 and the lower sliding plate 2 are made of metal or rubber material; a friction coating, such as a special friction material of polytetrafluoroethylene, is pasted on the upper sliding surface 3 and the lower sliding surface 4.

[0028] The inclined angles of the inclined sections 6 of the trapezoidal corrugated surface are the same; the inclined angle is 10°-80°; by selecting different inclined angles, friction coefficients of the contact surface, and elastic stiffness of the compression spring, the support can separate the normal use function and the auxiliary function during an earthquake, and can better play the corresponding role in stages and in a targeted manner, and can also optimize the seismic mitigation and isolation function and size of the support.

[0029] The compression spring 9 is always in a compressed state and provides an outward restoring force to the sliding blocks 8 on both sides.

[0030] The limiting side wall 10 is provided with a trapezoidal protrusion 11; the trapezoidal protrusions 11 are symmetrically arranged on the limiting side walls 10 on both sides, and the sliding blocks 8 are initially located in the two trapezoidal protrusions 11; the trapezoidal protrusions 11 change the distance between the two limiting side walls 10; when the sliding blocks 8 move outward from the trapezoidal protrusions 11, the compression spring 9 is compressed inward, so as to provide a restoring force to both sides.

[0031] In the normal use state (horizontal displacement of the upper structure caused by thermal expansion and cold contraction, or under the action of a small horizontal force), as shown in FIG. 2, the upper sliding plate 1 and the lower sliding plate 2 are in contact with each other only through the two horizontal sections, and the inclined sections are not in contact with each other. Figure 5As shown, at this time, the displacement is small, the upper and lower horizontal sections 5 are in contact, and the upper vertical load is transmitted. Only relative sliding or rotation occurs on the horizontal section 5, and the oblique wave section 6 is not in contact. At this time, the small horizontal displacement caused by thermal expansion and contraction of the support can be balanced. When the upper sliding plate 1 is displaced, it drives the guide rail 7 and the slider 8 to be displaced. The slider 8 slides on the limiting side wall 10 and leaves the trapezoidal protrusion 11. The distance between the sliders 8 decreases, and the spring is further compressed. The spring force generated by the compression spring 9 causes the slider to return to its position, realizing the spring reset function of the friction support.

[0032] When an earthquake occurs or the object is subjected to a large horizontal force, such as Figure 6 As shown, the relative displacement between the upper and lower horizontal segments reaches Ls, where Ls is the initial horizontal gap between the upper and lower oblique wave segments. Horizontal segment 5 is misaligned, and at this time, the upper and lower oblique wave segments 6 come into contact. Under the action of the continuously increasing horizontal thrust, the upper sliding plate 1 will slide obliquely along the oblique wave segment on the lower sliding plate 2. Through this action mechanism, not only can the kinetic energy of the upper structure be converted into gravitational potential energy, but it can also self-reset. In addition, through the friction on the sliding surface, a portion of the seismic energy is consumed, thereby realizing the auxiliary function of the support during an earthquake. During this working stage, the distance between the two limiting sidewalls 10 on the lower sliding plate 2 remains unchanged, and the distance between the two sliders 8 on the upper sliding plate 1 does not change during the movement. The compression spring 9 does not have a further compression tendency, and the self-resetting part does not play a role.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-stage behavior self-resetting frictional sliding isolation device, characterized in that, The application relates to a frictional sliding component and a self-resetting device; the frictional sliding component comprises an upper sliding plate and a lower sliding plate; the lower sliding plate is fixedly arranged; the bottom surface of the upper sliding plate and the top surface of the lower sliding plate are intersected to form an upper sliding surface and a lower sliding surface respectively; the upper sliding surface and the lower sliding surface can slide relative to each other; the upper sliding surface and the lower sliding surface are two intersected trapezoidal corrugated surfaces; the trapezoidal corrugated surfaces are divided into horizontal sections and inclined wave sections; the initial positions of the upper sliding surface and the lower sliding surface are that the horizontal sections of the two sliding surfaces are in contact, and the inclined wave sections are not in contact; the self-resetting device comprises a reset component and a limiting side wall; the reset component comprises a guide rail, a sliding block and a compression spring; the guide rail is fixedly arranged on the top surface of the upper sliding plate; one sliding block is arranged at the two ends of the guide rail; the sliding blocks are connected through the compression spring; the compression spring is always in a compressed state and is used for providing the sliding blocks on both sides with rebounding force outward; the two sides of the reset component are provided with the limiting side walls; the outer sides of the sliding blocks are in sliding contact with the inner walls of the limiting side walls; the limiting side walls are fixedly connected with the lower sliding plate; trapezoidal protrusions are arranged on the limiting side walls; the trapezoidal protrusions are symmetrically arranged on the limiting side walls on both sides; the sliding blocks are initially located in the two trapezoidal protrusions.

2. The multi-stage behavior self-resetting frictional sliding isolation device according to claim 1, characterized in that, The upper sliding plate and the lower sliding plate are made of metal or rubber material; a frictional coating is pasted on the upper sliding surface and the lower sliding surface.

3. The multi-stage behavior self-resetting frictional sliding isolation device according to claim 1, wherein, The inclined wave angles of the inclined wave sections of the trapezoidal corrugated surfaces are the same; the inclined wave angle is 10-80 degrees.

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