Anti-pulling triple friction pendulum support damping device

Abstract

The utility model provides an anti -pulling triple friction pendulum support damping device, including upper flat plate, lower flat plate and be equipped with between the upper sliding plate, middle sliding block and lower sliding plate, the bottom surface of upper flat plate is equipped with upper concave spherical surface and limiting ring, the top surface of lower flat plate is equipped with lower concave spherical surface and limiting ring, the upper surface of upper sliding plate is equipped with upper convex spherical surface and limiting ring, and the lower surface is equipped with upper concave spherical surface and limiting ring, and the upper and lower of middle sliding block are equipped with convex spherical surface and limiting ring, the upper surface of lower sliding plate is equipped with lower concave spherical surface and limiting ring, and the lower surface is equipped with lower convex spherical surface and limiting ring, the upper flat plate, lower flat plate, upper sliding plate, middle sliding block and lower sliding plate of the utility model are mutually engaged through limiting ring, improve the anti -pulling performance of friction pendulum support under the premise of not influencing support movement, promote multidimensional isolation effect.

Description

Technical Field

[0001] This utility model relates to the fields of building engineering technology and bridge engineering seismic isolation technology, and in particular to a triple friction pendulum bearing vibration damping device with pull-out resistance. Background Technology

[0002] Seismic isolation technology, as a more effective means of earthquake resistance, has received widespread attention in the engineering community. Among them, friction pendulum bearings, with their excellent self-setting performance and residual displacement control capabilities, have been widely used in engineering practice. However, traditional friction pendulum bearings have significant deficiencies in pull-out bearing capacity. When the structure is subjected to a large overturning moment, the bearings are prone to lift-off, leading to an increased risk of structural failure. Furthermore, traditional seismic isolation designs often neglect the influence of vertical seismic forces. In near-field earthquakes, the vertical acceleration effect is significant, and its peak value is usually comparable to the horizontal acceleration and shows a synchronous trend. Failure to fully consider vertical seismic forces may result in insufficient safety reserves in the seismic isolation structure, increasing the risk of structural failure.

[0003] Therefore, improving the pull-out resistance of friction pendulum bearings to achieve good seismic isolation effects under both horizontal and vertical seismic loads has become a key research direction and a critical issue that urgently needs to be addressed in current seismic isolation technology research. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the current vibration isolation technology by proposing a pull-out resistant triple friction pendulum bearing vibration damping device. Its goal is to improve the shortcomings of the triple friction pendulum bearing, enhance its pull-out resistance, and enable the bearing to achieve excellent vibration isolation and damping effects in multiple dimensions.

[0005] This utility model is achieved through the following technical solution.

[0006] The present invention relates to a shock-absorbing device for a triple friction pendulum support for pull-out resistance, comprising an upper plate, an upper sliding plate, a middle slider, a lower sliding plate, and a lower plate.

[0007] The upper plate includes a concave spherical surface I and a limiting ring I on its bottom surface.

[0008] The upper sliding plate has a convex spherical surface I that matches the concave spherical surface I of the upper plate and a limiting ring II on its top surface, and a concave spherical surface II that matches the convex spherical surface II of the middle slider and a limiting ring III on its bottom surface.

[0009] The middle slider has an upper convex spherical surface II that matches the upper concave spherical surface II of the upper sliding plate and a limiting ring IV on its top surface; and a lower convex spherical surface I that matches the lower concave spherical surface I of the lower sliding plate and a limiting ring V on its bottom surface.

[0010] The lower sliding plate has a concave spherical surface I that matches the convex spherical surface I of the middle slider and a limiting ring VII on its top surface, and a convex spherical surface II that matches the concave spherical surface II of the lower plate and a limiting ring VI on its bottom surface; it is arranged opposite to the upper sliding plate.

[0011] The lower plate includes a concave spherical surface II and a limiting ring VIII on its top surface; it is positioned opposite to the upper plate.

[0012] The upper plate, upper sliding plate, middle slider, lower sliding plate, and lower plate are arranged sequentially from top to bottom. The upper plate and upper sliding plate, the upper sliding plate and middle slider, the middle slider and lower sliding plate, and the lower sliding plate are connected by corresponding convex and concave spherical surfaces, which interlock through limiting rings to form a complete kinematic chain. The limiting rings restrict the movement range of each sliding plate and spherical surface, ensuring stability and pull-out resistance.

[0013] Furthermore, the concave and convex spherical surfaces of the upper plate, lower plate, upper sliding plate, middle slider, and lower sliding plate have the same curvature.

[0014] Furthermore, the limiting rings on the surfaces of the upper plate, lower plate, upper sliding plate, middle slider, and lower sliding plate have the same curvature.

[0015] A further option is that the opening width of the limiting ring is in the range of 50mm-100mm.

[0016] A further embodiment is that the surfaces of the upper convex spherical surface, the lower convex spherical surface, the upper concave spherical surface, and the lower concave spherical surface are fully coated with a polytetrafluoroethylene layer, wherein the coating thickness of the polytetrafluoroethylene layer ranges from 0.5 mm to 3 mm.

[0017] Compared with existing technologies, the above technical solution has at least the following beneficial effects:

[0018] By adding upper and lower sliding plates between the upper and lower plates, the support acquires adaptive performance (stiffness and damping change with earthquake intensity). The upper and lower surfaces of the upper, middle, and lower sliding plates are coated with polytetrafluoroethylene (PTFE) for better friction. Limiting rings are installed on the upper and lower surfaces of the upper, middle, and lower sliding plates. The interlocking of the limiting rings on different structures increases the support's pull-out resistance. During an earthquake, the friction pendulum support undergoes graded motion, isolating the earthquake from the damping above and prolonging the natural period of the superstructure, thereby reducing the impact of the earthquake. Subsequently, the device gradually returns to its original shape under the action of gravity, reducing residual deformation.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of an embodiment.

[0022] Figure 2 This is a schematic diagram of the upper plate structure in an embodiment.

[0023] Figure 3 This is a schematic diagram of the lower plate structure in an embodiment.

[0024] Figure 4 This is a schematic diagram of the upper sliding plate in an embodiment.

[0025] Figure 5 This is a schematic diagram of the lower sliding plate in an embodiment.

[0026] Figure 6 This is a schematic diagram of the slider in the embodiment.

[0027] Figure 7 This is a cross-sectional view of an embodiment.

[0028] Reference numerals in the attached diagram: 100 is the upper plate; 110 is the limiting ring I; 120 is the upper concave spherical surface I; 200 is the upper sliding plate; 210 is the upper convex spherical surface I; 220 is the limiting ring II; 230 is the upper concave spherical surface II; 240 is the limiting ring III; 300 is the middle slider; 310 is the limiting ring IV; 320 is the limiting ring V; 330 is the upper convex spherical surface II; 340 is the lower convex spherical surface I; 400 is the lower sliding plate; 410 is the lower convex spherical surface II; 420 is the limiting ring VI; 430 is the lower concave spherical surface I; 440 is the limiting ring VII; 500 is the lower plate; 510 is the limiting ring VIII; 520 is the lower concave spherical surface II. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.

[0030] Example 1

[0031] Please see Figures 1 to 7 This embodiment provides a pull-out triple friction pendulum support shock absorption device, including an upper plate 100, an upper sliding plate 200, a middle slider 300, a lower sliding plate 400, and a lower plate 500.

[0032] The upper plate 100 includes an upper concave spherical surface I120 and a limiting ring I110 provided on the bottom surface.

[0033] The upper sliding plate 200 has an upper convex spherical surface I210 that matches the upper concave spherical surface I120 of the upper plate 100 and a limiting ring II220 on its top surface, and an upper concave spherical surface II230 that matches the upper convex spherical surface II330 of the middle slider 300 and a limiting ring III240 on its bottom surface.

[0034] The middle slider 300 has an upper convex spherical surface II330 that matches the upper concave spherical surface II230 of the upper sliding plate 200 and a limiting ring IV310 on its top surface; and a lower convex spherical surface I340 that matches the lower concave spherical surface I430 of the lower sliding plate 400 and a limiting ring V320 on its bottom surface.

[0035] The lower sliding plate 400 has a concave spherical surface I 430 that matches the convex spherical surface I 340 of the middle slider 300 and a limiting ring VII 440 on its top surface, and a convex spherical surface II 410 that matches the concave spherical surface II 520 of the lower plate 500 and a limiting ring VI 420 on its bottom surface; it is arranged opposite to the upper sliding plate 200.

[0036] The lower plate 500 includes a concave spherical surface II 520 and a limiting ring VIII 510 disposed on its top surface; it is disposed opposite to the upper plate 100.

[0037] The upper plate 100, upper sliding plate 200, middle slider 300, lower sliding plate 400, and lower plate 500 are arranged sequentially from top to bottom. The upper plate 100 and upper sliding plate 200, the upper sliding plate 200 and middle slider 300, the middle slider 300 and lower sliding plate 400, and the lower sliding plate 400 and lower plate 500 are connected by their respective convex and concave spherical surfaces, which interlock through limiting rings to form a complete kinematic chain. The limiting rings restrict the movement range of each sliding plate and spherical surface, ensuring stability and pull-out resistance.

[0038] It should be noted that in this system, the upper plate 100, lower plate 500, upper sliding plate 200, lower sliding plate 400, and middle slider 300 are all made of Q235 steel, and the steel surfaces are coated with some corrosion-resistant material. With this setup, under the action of an earthquake, the upper plate 100, upper sliding plate 200, lower sliding plate 400, and middle slider 300 start to slide simultaneously, and the upper structure undergoes a pendulum motion, maintaining a horizontal position during the motion. The sliding friction of the upper sliding plate 200, lower sliding plate 400, and middle slider 300 dissipates the seismic energy, prolonging the natural vibration period of the upper structure, thereby reducing the impact of the earthquake. Afterward, the device gradually returns to its original state under the action of gravity, reducing residual deformation.

[0039] It should be noted that an accommodating cavity is formed between the upper concave spherical surface I120 and the lower concave spherical surface II520; an upper sliding plate 200, a lower sliding plate 400, and a middle sliding block 300 are placed in the accommodating cavity, wherein the upper surface and the lower surface of the middle sliding block 300 respectively abut against the upper sliding plate 200 and the lower sliding plate 400 to form a sliding friction pair;

[0040] Furthermore, the convex upper spherical surface, the convex lower spherical surface, the concave lower spherical surface, and the surface of the concave upper spherical surface are all fully coated with a polytetrafluoroethylene (PTFE) layer, the coating thickness of which ranges from 0.5 mm to 3 mm. This can further improve the sliding friction pair of the contact surface, achieving a better vibration isolation effect, while also improving the wear resistance of the contact surface.

[0041] Please see Figure 7 Under seismic loading, the upper sliding plate 200, lower sliding plate 400, and middle sliding block 300 within the upper plate 100 and lower plate 500 begin to slide, while maintaining their proper fit. Simultaneously, the limiting rings on the upper and lower surfaces of these components also remain in place. This improves the system's pull-out resistance, making the supports less prone to detachment and effectively protecting the structure.

[0042] In the above technical solution, the upper sliding plate 200, the lower sliding plate 400, and the middle sliding block 300, with their internal double symmetrical spherical surfaces, enable the triple friction pendulum support to have pull-out resistance. When subjected to overturning moment, it is not easily pulled away from the seismic response of the control structure, thus improving the vertical seismic isolation effect and achieving multi-dimensional seismic isolation and reduction.

[0043] Of course, it should also be added that the system can also exhibit different stiffness and damping during movement by reasonably designing the geometric parameters of the supports and selecting the friction materials of the friction surfaces. This allows it to meet the seismic isolation requirements under different levels of seismic action in the three movement stages, thereby achieving multiple seismic fortification objectives.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A shock-absorbing device for a triple friction pendulum support against pull-out, characterized in that: The upper flat plate, the upper sliding plate, the middle sliding block, the lower sliding plate and the lower flat plate are sequentially arranged from top to bottom, and the upper flat plate and the upper sliding plate, the upper sliding plate and the middle sliding block, the middle sliding block and the lower sliding plate, and the lower sliding plate and the lower flat plate are mutually engaged by the corresponding convex spherical surfaces, concave spherical surfaces and limiting rings, thereby forming a complete movement chain. The limiting rings on the surfaces of the upper flat plate, the lower flat plate, the upper sliding plate, the middle sliding block and the lower sliding plate have the same curved surface radian. The limiting rings on the surfaces of the upper flat plate, the lower flat plate, the upper sliding plate, the middle sliding block and the lower sliding plate have the same curved surface radian. The limiting ring has an opening width range of 50mm-100mm. ​ ​ ​ 2. A tri-friction pendulum seismic isolation bearing according to claim 1, wherein ​ 3. The anti -pulling tri-friction pendulum seismic isolation bearing according to claim 1, characterized in that ​ 4. The anti -pulling tri-friction pendulum seismic isolation bearing according to claim 1, characterized in that ​

Images