WO2019024552A1

WO2019024552A1 - Self-resetting, friction pendulum three-dimensional seismic damping and isolation bearing

Info

Publication number: WO2019024552A1
Application number: PCT/CN2018/084952
Authority: WO
Inventors: 王浩; 郑文智; 祝青鑫
Original assignee: 东南大学
Priority date: 2017-08-04
Filing date: 2018-04-27
Publication date: 2019-02-07
Also published as: CN107604810A

Abstract

A self-resetting, friction pendulum three-dimensional seismic damping and isolation bearing. A recessed blind hole is disposed in a middle portion of a lower bearing plate (4). A damping layer (7) and a vertical damping spring (8) are disposed at the bottom of the recessed blind hole. An upper portion of the vertical damping spring (8) is connected to a spherical slide plate (3). A hinged slider (2) is disposed on an upper portion of the spherical slide plate (3), and an upper spherical surface of the hinged slider (2) is located within a slider accommodation cavity (12) provided at a lower portion of an upper bearing plate (1). A reaction plate (6) is disposed on the periphery of an upper portion of the lower bearing plate (4), and a horizontal damping spring (5) is located between the reaction plate (6) and an outer peripheral wall of the slider accommodation cavity (12). The horizontal damping spring (5) and the vertical damping layer (7) are used to improve the durability and seismic isolation performance of a friction pendulum isolation bearing. The use of the horizontal damping spring (5) leverages the full energy consumption capabilities of the reaction plate to ensure that the structure can perform seismic damping and isolation under extreme loads such as earthquakes and typhoons.

Description

Self-resetting friction pendulum three-dimensional seismic isolation bearing

Technical field

The invention relates to a self-resetting friction pendulum three-dimensional seismic isolation bearing, belonging to the technical field of seismic isolation (vibration) control of bridges, houses and the like in the field of civil engineering.

Background technique

China is located in the Pacific Rim seismic belt-Eurasian seismic zone, with frequent earthquakes and earthquakes, which have brought unbearable losses to people's lives and property. The development of new seismic isolation and isolation devices to enhance the seismic performance of buildings and bridge structures is the key to ensuring people's lives and property safety.

In recent years, isolated structures (such as isolated buildings, isolated bridges, etc.) have been widely used and have shown good seismic performance in earthquakes. As a kind of friction-isolated seismic isolation bearing, the friction pendulum isolation bearing is widely used in engineering structure to reduce vibration and isolation. When the structure encounters a strong earthquake, the displacement of the friction pendulum isolation bearing will exceed the limit. When the displacement is too large, the hinged slider will collide with the limit plate. When the limit plate is damaged, the upper structure will collapse. . If the isolated building collapses due to overturning, the isolated bridge will collapse due to the overrun of the bearing. The key to the problem is that the energy consumption of the traditional friction pendulum isolation bearing is mainly based on the friction material itself, and the friction damping material performance is mainly used. Earthquake is a random load. When the seismic isolation device cannot meet the energy consumption requirements of the structure, the structure will be destroyed. Especially under the action of strong earthquakes, it is difficult to achieve the seismic fortification target of “big earthquake does not fall”. The damping coefficient of the friction damping material of the traditional friction pendulum isolation bearing is constant, and its energy consumption capacity mainly depends on the energy consumption capacity of the friction damping material. As the use time increases, the material performance will gradually degrade and cannot reach the expected. The effect is difficult to adapt to the structural damping control under various extreme loads.

The viscoelastic high damping rubber material is a new functional material with strong deformation. It uses the strong viscoelasticity of its own to dampen the structural vibration. It has many advantages such as lighter weight, better fatigue resistance and better vibration damping performance. . At the same time, when subjected to external loads, the material's own viscoelasticity is used to dampen energy consumption, and external energy is converted into heat energy by viscous internal friction between molecular chains to consume external energy. This material is widely used in construction engineering and bridge engineering. In the field of mechanical engineering.

In order to more effectively control the seismic response under the action of multi-dimensional strong earthquakes, it is necessary to develop a new type of friction pendulum isolation support to achieve multi-dimensional seismic isolation control and minimize structural damage and damage caused by earthquakes. At present, the research and development of the new type of friction pendulum isolation bearing is as follows: “a variable curvature friction pendulum isolation bearing”, “a bidirectional variable curvature friction pendulum isolation bearing”, “friction pendulum isolation bearing, intelligent support” Seat and support monitoring system", "a three-dimensional isolation support", but the limit device of such a friction pendulum isolation support can only rely on one side limit device to provide limit and consumption when reaching the maximum allowable displacement Yes, the performance of the material is not fully utilized; on the other hand, relying solely on the frictional damping energy consumption, the energy dissipation performance of the frictional energy-consuming material will gradually decrease with the increase of time, and the energy consumption mode is single.

Therefore, it is urgent to solve the above problems.

Summary of the invention

Technical Problem: The object of the present invention is to provide a self-resetting friction pendulum three-dimensional seismic isolation bearing. The energy consumption performance of the conventional friction pendulum isolation bearing limiting device is poor, and the energy-consuming friction material decreases with time, and is difficult to replace. The utility model can only realize the horizontal isolation and can not realize the difficulty of vertical isolation. The invention adopts the horizontal damping spring and the viscoelastic high damping rubber material to improve the durability and the seismic isolation performance of the friction pendulum isolation bearing. The viscoelastic high damping rubber material is used to realize the flexible connection of the contact surface, avoiding the local damage of the member under the sudden extreme load such as strong earthquake, and realizing the three-dimensional seismic isolation under the extreme loads such as earthquake and typhoon.

Technical Solution: A self-resetting friction pendulum three-dimensional seismic isolation mount comprises an upper support plate, an articulated slide, a spherical slide plate, a lower support plate, a horizontal shock absorption spring, a reaction force plate, a shock absorption layer, and a vertical a damping spring, a friction pad, a dust seal, a bolt hole, a slider cavity, a power consumption ring, a guide rod; wherein a concave blind hole is formed in a middle portion of the lower support plate, The bottom of the blind hole is provided with a vertical damping spring, the upper part of the vertical damping spring is connected with the spherical sliding plate, the upper part of the spherical sliding plate is provided with an articulated slider, and the upper spherical surface of the hinged sliding block is located at the lower part of the upper supporting plate In the cavity, a reaction plate is arranged around the upper part of the lower support, and the horizontal damping spring is located between the reaction plate and the outer peripheral wall of the slider cavity.

The upper support plate and the hinged slider are flexibly connected through the shock absorbing layer, and the hinged slider can be freely rotated at any angle in the slider cavity to realize vertical energy absorbing shock, and the shock absorbing layer is a viscoelastic high damping material. (such as high damping rubber).

The hinged slider and the spherical sliding plate are closely connected by a friction pad, and the friction pad is a low friction material.

The inner bottom surface of the lower support plate and the lower surface of the spherical slide plate are both rough surfaces to increase the connection between the shock absorbing layer and the lower support plate and the spherical slide plate.

There are a plurality of horizontal damping springs respectively located between the outer side of the slider cavity and the inner side of the reaction plate, one end of which is connected to the outside of the slider cavity of the lower part of the upper support plate, and the other end is connected to the inner side of the reaction plate. The horizontal damping spring is provided with a horizontal guiding rod, and the horizontal guiding rod is freely expandable and contractible with the horizontal damping spring.

The horizontal damping spring is provided with an energy consumption ring, and the horizontal damping spring can consume energy through the energy consumption ring when the compression is compressed, and the energy consumption ring is a viscoelastic high damping material (such as high damping rubber).

The top of the reaction plate and the lower part of the upper support plate are flexibly connected by a dustproof ring, and bolt holes are provided on the outer periphery of the upper support plate and the lower support plate to achieve a firm connection with the upper structure and the lower structure.

The maximum amount of compression of the horizontal damper spring when pressed is the distance from the inner surface of the reaction plate to the outer edge of the spherical slider.

The bottom of the inner cavity of the lower support plate is provided with a shock absorbing layer of a vertical damper spring, and the lower support plate and the spherical slide plate are connected to the vertical damper spring through the shock absorbing layer.

The energy dissipation principle of the self-resetting friction pendulum three-dimensional seismic isolation mount of the invention:

On the basis of making full use of the energy dissipation performance of the material of the seismic isolation device, the horizontal damping spring is used to make the limit plate uniformly stressed by the horizontal damping spring when the horizontal displacement of the friction pendulum isolation bearing occurs; When the seismic isolation bearing has a large horizontal displacement under the action of the earthquake, the pressure-receiving side and the tension-side horizontal damping spring both provide the reaction force, and the horizontal damping spring makes the reaction plate evenly stressed; when the friction pendulum isolation bearing When the maximum allowable displacement is reached under strong earthquakes, the horizontal damping spring on the pressure side reaches the maximum compression amount, providing horizontal pressure. The horizontal damping spring realizes the deformation energy consumption by compressing the energy consumption circle, and the horizontal damping spring on the tension side The horizontal pulling force is still provided, which doubles the self-resetting ability of the friction pendulum isolation bearing. At this time, the reaction plate plays the role of the limit plate. Due to the action of the horizontal spring, the impact resistance of the self-resetting friction pendulum isolation support is obviously improved, and the position plate is prevented from being partially caused by the collision with the hinged slider. Damage, even serious damage.

Compared with the traditional friction pendulum isolation bearing, the friction pendulum isolation bearing is provided with a damping layer and a vertical damping spring in the lower part of the spherical sliding plate, which has significant deformation and friction energy consumption capability. The spherical slide plate and the lower support plate are connected by a shock absorbing layer and a vertical damper spring. Under the action of earthquake, when the hinged slider slides toward the edge of the spherical sliding plate, the damping layer under the spherical sliding plate at the hinged slider and the vertical damping spring compress and deform the energy, and the vibration damping under the other side of the spherical sliding plate The layer and vertical damping springs are subjected to tensile deformation and energy consumption, and vertical shock absorption can be realized.

The design idea of the invention is to enhance the support limit capability and realize multi-dimensional shock absorption.

Advantageous Effects: The benefits brought by the present invention, the achieved indicators.

1. In the invention, when the horizontal damping spring is subjected to compression deformation, the energy consumption circle is used to realize the compression deformation energy consumption.

2. The present invention multiplies the performance of the horizontal damping spring while increasing the energy consumption performance on the basis of the uniform force of the reaction plate.

3. The invention is applicable to various engineering structures, and the three-dimensional seismic isolation and isolation can be realized by the horizontal damping spring, the energy consumption ring and the vertical damping layer.

DRAWINGS

Figure 1 is a cross-sectional view of the self-resetting friction pendulum three-dimensional seismic isolation mount of the present invention;

2 is a top plan view of a three-dimensional seismic isolation mount of a self-resetting friction swing of the present invention;

Figure 3 is a cross-sectional view taken along line A-A of Figure 1;

Figure 4 is a cross-sectional view taken along line B-B of Figure 1;

Figure 5 is a detailed view of the member 13 of Figure 1;

The figure includes: upper support plate 1; hinge slide 2; spherical slide 3; lower support plate 4; horizontal shock absorbing spring 5; reaction plate 6; shock absorbing layer 7; vertical damper spring 8; Pad 9; dust ring 10; bolt hole 11; slider cavity 12; energy consuming ring 13; horizontal guide bar 14.

Detailed ways

The invention relates to a self-resetting friction pendulum three-dimensional seismic isolation bearing, comprising an upper support plate; an articulated sliding block; a spherical sliding plate; a lower supporting plate; a horizontal damping spring; a reaction plate; a damping layer; Shock absorbing spring; friction pad; dust ring; bolt hole; slider cavity; energy consumption ring;

The bottom of the inner cavity of the lower support plate is provided with a shock absorbing layer and a vertical damper spring, and the lower support plate and the spherical slide plate are connected with the vertical damper spring through the shock absorbing layer, and the inner bottom surface of the lower support plate and the spherical slide plate The bottom surface is a rough surface, which can enhance the connection between the shock absorbing layer and the lower support plate and the spherical slide plate.

The hinged slider and the spherical sliding plate are closely connected by a friction pad, and the friction pad is a low friction material and has a uniform thickness.

The upper support plate and the hinged slider are flexibly connected by the shock absorbing layer, and the hinged slider is freely rotatable at any angle in the slider cavity, and vertical energy absorbing shock can be realized.

One end of the horizontal damping spring is connected with the upper support plate, the other end is connected with the reaction plate, the horizontal damping spring is provided with an energy consumption ring, and the outer circumference is provided with a horizontal guide bar, and the horizontal guide bar can be freely extended and contracted with the horizontal damping spring. And to ensure that the damping spring is deformed in the horizontal direction, when the horizontal damping spring is pressed, the energy consumption ring can realize energy consumption by compression deformation.

The bottom of the reaction plate and the lower end of the outer end of the upper support plate are flexibly connected by a dustproof ring, and bolt holes are provided on the outer periphery of the upper support plate and the lower support plate to achieve a firm connection with the upper structure and the lower structure.

Preferably, the horizontal damper spring is evenly arranged along the center of the reaction plate and the upper support plate to ensure that the horizontal damper spring and the reaction plate are uniformly stressed; the vertical damper spring is evenly arranged on the inner bottom surface of the lower support plate

Preferably, the two ends of the guiding rod are respectively connected with the inner side of the reaction plate and the upper supporting plate, and a certain rotation angle can occur.

Preferably, the shock absorbing layer and the energy consuming ring are viscoelastic high damping materials, maintain a suitable thickness, and utilize the strong deformation capability to realize energy consumption.

Preferably, a lower gap is formed between the lowermost end of the slider cavity and the outermost end of the hinged slider, so that a certain rotation angle of the hinged slider during the sliding process can be ensured, and the upper support plate is co-deformed.

Preferably, the initial stiffness of the spring is set according to the seismic fortification requirements.

The present invention will be further described in detail below with reference to the accompanying drawings:

As shown in FIG. 1 , the self-resetting friction pendulum three-dimensional seismic isolation mount comprises: an upper support plate 1; a hinged slide 2; a spherical slide plate 3; a lower support plate 4; Spring 5; reaction plate 6; shock absorbing layer 7; vertical damper spring 8; friction pad 9; dust ring 10; bolt hole 11; slider cavity 12; energy consuming ring 13; horizontal guide bar 14.

As shown in FIG. 1 and FIG. 4, the bottom of the inner cavity of the lower support plate 4 is provided with a shock absorbing layer 7, a vertical damper spring 8, and the lower support plate 4 and the spherical slide plate 3 pass through the shock absorbing layer 7, vertical The shock absorbing springs 8 are connected, and the inner bottom surface of the lower support plate 4 and the lower surface of the spherical slide plate 3 are both rough surfaces, and the connection between the shock absorbing layer 7 and the lower support plate 4 and the spherical slide plate 3 can be enhanced. The articulated slide 2 is intimately connected to the spherical slide 3 via a friction pad 9. The upper support plate 1 and the hinged slider 2 are flexibly connected by the shock absorbing layer 7, and the hinged slider 2 is freely rotatable at any angle in the slider cavity 12, and vertical energy absorbing shock can be realized.

As shown in FIG. 2, the top edge of the upper support plate 1 is evenly provided with bolt holes 11 to achieve a firm connection with the upper structure.

As shown in FIG. 1 and FIG. 3, the bottom edge of the bottom plate of the lower support plate 4 is evenly provided with bolt holes 11 to achieve a firm connection with the lower structure. One end of the horizontal shock absorbing spring 5 is connected to the upper support plate 1 , the other end is connected to the reaction force plate 6 , the horizontal shock absorbing spring 5 is provided with an energy consumption ring 13 , and the outer circumference is provided with a horizontal guide rod 14 , and the horizontal guide rod 14 can be The horizontal damper spring 5 is freely stretched and contracted, and the horizontal damper spring 5 is deformed in the horizontal direction; when the horizontal damper spring 5 is compressed and deformed, the energy consuming ring 13 can be consumed by compression deformation.

As shown in FIG. 1, the top of the reaction plate 6 and the lower end of the outer end of the upper support plate 1 are flexibly connected by the dust seal 10, and the dust seal 10 can be freely extended and contracted horizontally and vertically. The maximum amount of compression when the horizontal damper spring 5 is pressed is the distance from the inner surface of the reaction plate 6 to the outer edge of the spherical slider 3.

As shown in Figure 4, the energy dissipation principle of the self-resetting friction pendulum three-dimensional seismic isolation bearing:

Compared with the traditional friction pendulum isolation bearing, when the self-resetting friction pendulum three-dimensional seismic isolation bearing is subjected to horizontal earthquakes, typhoons and other loads, the utilization level is fully utilized on the basis of the energy consumption performance of the friction pad 9. When the shock absorbing spring 5 causes the horizontal displacement of the friction pendulum isolation bearing, the limiting plate 6 is uniformly stressed by the horizontal damping spring 5; when a large horizontal displacement occurs under the earthquake of the friction pendulum isolation bearing, Both the pressure side and the tension side horizontal damper spring 5 provide a reaction force, and the horizontal damper spring 5 makes the reaction plate 6 uniformly stressed; when the maximum allowable displacement is reached under the strong shock of the friction pendulum isolation bearing, the pressure is one The horizontal horizontal damper spring 5 reaches the maximum compression amount and provides horizontal pressure. The energy consuming ring 13 realizes horizontal energy consumption through compression deformation, while the horizontal damper spring 5 on the tension side still provides horizontal tension, which doubles the friction swing isolation branch. Self-reset capability. At this time, the reaction plate 6 plays a limiting role. Due to the action of the horizontal damping spring 5, the impact resistance of the self-resetting friction pendulum isolation bearing is obviously improved, and the reaction plate 6 is avoided and the hinged slider 2 is avoided. Local damage occurs even in the event of a collision.

The self-resetting friction pendulum three-dimensional seismic isolation bearing is provided with a damping layer 7 and a vertical damping spring 8 at the lower portion of the spherical sliding plate 3, which has significant deformation and friction energy consuming capability. The spherical skateboard 3 and the lower support plate 4 are connected by the shock absorbing layer 7 and the vertical damper spring 8, and under the vertical earthquake, when the hinged slider 2 slides toward the edge of the spherical slide 3, the hinge is slid The damping layer 7 below the spherical sliding plate 3 at block 2, the vertical damping spring 8 consumes energy by compression deformation, and the damping layer 7 on the other side of the spherical sliding plate 3 and the vertical damping spring 8 are subjected to tensile deformation and energy consumption. Vertical shock absorption.

It should be noted that a number of modifications and refinements may be made by those skilled in the art without departing from the principles of the invention, and such modifications and refinements are also considered to be within the scope of the invention. The components that are not clear in this embodiment can be implemented by the prior art.

Claims

A self-resetting friction pendulum three-dimensional seismic isolation bearing, characterized in that: the seismic isolation bearing comprises an upper support plate (1), an articulated sliding block (2), a spherical sliding plate (3) and a lower supporting plate ( 4) Horizontal damping spring (5), reaction plate (6), damping layer (7), vertical damping spring (8), friction pad (9), dust ring (10), bolt hole ( 11) a slider cavity (12), an energy consumption ring (13), a guide bar (14); wherein a concave blind hole is provided in a middle portion of the lower support plate (4), The bottom of the blind hole is provided with a vertical damping spring (8), the upper part of the vertical damping spring (8) is connected with the spherical sliding plate (3), and the upper part of the spherical sliding plate (3) is provided with an articulated sliding block (2). The upper spherical surface of the hinged slider (2) is located in the slider cavity (12) at the lower part of the upper support plate (1); the reaction plate (6) is provided at the periphery of the upper part of the lower support plate (4), horizontally damped The spring (5) is located between the reaction plate (6) and the peripheral wall of the slider cavity (12).
The self-resetting friction pendulum three-dimensional seismic isolation bearing according to claim 1, wherein the upper support plate (1) and the hinged slider (2) are flexibly connected by a damping layer (7), The hinged slider (2) can be rotated at any angle in the slider cavity (12) to realize vertical energy absorption shock absorption, and the shock absorption layer (7) is a viscoelastic high damping material (such as high damping rubber).
The self-resetting friction pendulum three-dimensional seismic isolation bearing according to claim 1, wherein the hinged slider (2) and the spherical sliding plate (3) are closely connected by a friction pad (9), and the friction pad ( 9) is a low friction material.
The self-resetting friction pendulum three-dimensional seismic isolation bearing according to claim 1, wherein the inner bottom surface of the lower support plate (4) and the lower surface of the spherical sliding plate (3) are rough surfaces to increase The connection of the damping layer (7) to the lower support plate (4) and the spherical slide plate (3).
The self-resetting friction pendulum three-dimensional seismic isolation bearing according to claim 1, wherein the horizontal damping springs (5) are pluralityed, respectively located outside the slider cavity (12) and the reaction force Between the inner measurement of the plate (6), one end is connected to the outer side of the slider cavity (12) at the lower part of the upper support plate (1), and the other end is connected to the inner side of the reaction force plate (6), and the horizontal shock absorbing spring (5) There is a horizontal guide rod (14), and the horizontal guide rod (14) is freely expandable and contractible with the horizontal damping spring.
The self-resetting friction pendulum three-dimensional seismic isolation bearing according to claim 1, wherein the horizontal damping spring (5) is provided with an energy consumption ring (13) and a horizontal damping spring (5) When energy is compressed, the energy consumption ring can be used, and the energy consumption ring (13) is a viscoelastic high damping material (such as high damping rubber).
The self-resetting friction pendulum three-dimensional seismic isolation bearing according to claim 1, characterized in that: the top of the reaction plate (6) and the lower part of the upper support plate (1) pass the dust ring (10) The flexible connection, the upper support plate (1) and the lower support plate (4) are provided with bolt holes (11) on the outer circumference to achieve a firm connection with the upper structure and the lower structure.
The self-resetting friction pendulum three-dimensional seismic isolation bearing according to claim 1, wherein the maximum compression amount of the horizontal damping spring (5) when pressed is the inner surface of the reaction plate to the spherical sliding plate. The distance from the outer edge.
The self-resetting friction pendulum three-dimensional seismic isolation bearing according to claim 1, characterized in that: the bottom portion of the inner cavity of the lower support plate (4) is provided with a damping layer of a vertical damping spring (8) (7) The lower support plate (4) and the spherical slide plate (3) are connected to the vertical damper spring (8) through the shock absorbing layer (7).