CN107604810A - A kind of Self-resetting friction pendulum three-dimensional shock damping and insulation bearing - Google Patents

Abstract

The present invention is a self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing. A concave blind hole is arranged in the middle of the lower bearing plate (4), and a shock-absorbing layer is arranged at the bottom of the concave blind hole. (7) with the vertical damping spring (8), the top of the vertical damping spring (8) is connected with the spherical slide (3), and the top of the spherical slide (3) is provided with the hinged slide block (2), the hinged slide The upper spherical surface of (2) is located in the slide block cavity (12) of the bottom of the upper support plate (1); a reaction force plate (6) is arranged on the periphery of the upper part of the lower support plate (4), and a horizontal damping spring (5 ) is located between the reaction force plate (6) and the outer peripheral wall of the slider cavity (12). The invention has a circular structure, adopts horizontal shock-absorbing springs and vertical shock-absorbing layers to improve the durability and shock-isolation performance of the friction pendulum shock-isolation support, fully exerts the energy dissipation capacity of the reaction plate through the horizontal shock-absorbing springs, and realizes Three-dimensional seismic isolation of structures under extreme loads such as earthquakes and typhoons.

Description

A self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing

technical field

The invention relates to a self-resetting friction pendulum three-dimensional shock-absorbing and isolation bearing, which belongs to the technical field of shock-absorbing and isolating (vibration) control of structures such as bridges and houses in the field of civil engineering.

Background technique

my country is located in the circum-Pacific seismic belt-Eurasian seismic belt, with frequent earthquakes, which have brought unbearable losses to people's lives and property. It is the key to ensure the safety of people's lives and property to develop new shock-absorbing and isolating devices to enhance the seismic performance of buildings and bridge structures.

In recent years, isolated structures (such as isolated buildings, isolated bridges, etc.) have been widely used and have shown good anti-seismic performance in earthquakes. Friction pendulum shock-isolation bearing, as a kind of shock-isolation bearing with frictional energy consumption as the main factor, is widely used in engineering structure shock-isolation. When the structure encounters a strong earthquake, the displacement of the friction pendulum isolation support will exceed the limit. When the displacement is too large, the hinge slider will collide with the limit plate. When the limit plate is damaged, the upper structure will collapse. . For example, the earthquake-isolated building overturned and collapsed, and the earthquake-isolated bridge caused the beam to fall and the structure to collapse due to the excessive bearing displacement. The crux of the problem is that the energy consumption of traditional friction pendulum isolation bearings is mainly based on the energy consumption of the friction material itself, and the performance of the friction damping material is mainly used. Earthquake is a kind of random load. When the shock-absorbing and isolating device cannot meet the energy consumption demand of the structure, the structure will be damaged, especially under the action of strong earthquake, it is difficult to achieve the anti-seismic fortification goal of "not falling down after a big earthquake". The damping coefficient of the friction damping material of the traditional friction pendulum isolation support is constant, and its energy dissipation capacity mainly depends on the energy dissipation capacity of the friction damping material. As the use time increases, the material performance will gradually degrade and cannot reach the expected effect, it is difficult to adapt to the structural shock absorption control under various extreme loads.

Viscoelastic high damping rubber material is a new functional material with strong deformation. It uses its own strong viscoelasticity to damp structural vibration. It has many advantages such as light weight, good fatigue resistance and vibration damping performance. . At the same time, when subjected to external loads, the viscoelasticity of the material itself is used for damping and energy dissipation, and the external energy is converted into thermal energy through the viscous internal friction between molecular chains to consume external energy. This material is widely used in construction engineering and bridge engineering. , Mechanical engineering field.

In order to more effectively control the seismic response of structures under multidimensional strong earthquakes, it is necessary to develop new friction pendulum isolation bearings to achieve multidimensional isolation control and minimize structural damage and destruction caused by earthquakes. At present, the research and development of new friction pendulum isolation bearings such as "a friction pendulum isolation bearing with variable curvature", "a two-way variable curvature friction pendulum isolation bearing", "friction pendulum isolation seat and support monitoring system", "a three-dimensional seismic isolation support", but the limit device of this type of friction pendulum seismic isolation support can only rely on one side limit device to provide limit, consumption On the other hand, only relying on frictional damping energy dissipation, as time increases, the energy dissipation performance of frictional energy-dissipating materials will gradually decrease under the action of periodic loads, and the energy dissipation mode is single.

Therefore, urgently need to solve the above-mentioned problem.

Contents of the invention

Technical problem: The purpose of this invention is to provide a self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing, which is aimed at the poor energy consumption performance of the limit device of the traditional friction pendulum and shock-isolating bearing, and the performance of the energy-consuming friction material decreases with time, making it difficult to replace , and can only achieve shock isolation in the horizontal direction, and cannot achieve vertical shock isolation. The present invention uses horizontal shock absorbing springs and viscoelastic high-damping rubber materials to improve the durability and shock absorption and isolation performance of the friction pendulum shock-isolation bearing. The viscoelastic high damping rubber material is used to realize the flexible connection of the contact surface, to avoid local damage of the components under sudden extreme loads such as strong earthquakes, and to realize the three-dimensional shock absorption and isolation of the structure under extreme loads such as earthquakes and typhoons.

Technical solution: A self-resetting friction pendulum three-dimensional shock-absorbing and isolating support of the present invention includes an upper support plate, a hinged slider, a spherical slide plate, a lower support plate, a horizontal shock-absorbing spring, a reaction force plate, a shock-absorbing layer, a vertical to shock absorbing springs, friction pads, dust-proof rings, bolt holes, slider chambers, energy-dissipating rings, and guide rods; wherein, a concave blind hole is provided in the middle of the lower support plate, and the concave The bottom of the shaped blind hole is provided with a vertical damping spring, the upper part of the vertical damping spring is connected to a spherical slide, and the upper part of the spherical slide is provided with a hinged slider, and the upper spherical surface of the hinged slider is located In the cavity; a reaction force plate is arranged on the upper periphery of the lower support plate, and the horizontal damping spring is located between the reaction force 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 freely rotate along any angle in the slider cavity to realize vertical energy consumption and shock absorption. The shock-absorbing layer is a viscoelastic high-damping material (such as high damping rubber).

The hinged slide block is closely connected with the spherical slide plate through a friction pad, and the friction pad is made of low-friction material.

Both the inner bottom surface of the lower support plate and the lower bottom surface of the spherical slide plate are rough surfaces, so as to increase the connection between the shock absorbing layer and the lower support plate and the spherical slide plate.

There are multiple horizontal damping springs, which are respectively located between the outer side of the slider cavity and the inner side of the reaction force plate, one end of which is connected to the outer side of the slider cavity at the lower part of the upper support plate, and the other end is connected to the inner side of the reaction force plate , the horizontal shock absorbing spring is provided with a horizontal guide rod, and the horizontal guide rod freely expands and contracts with the horizontal shock absorbing spring.

The horizontal shock-absorbing spring is provided with an energy-dissipating ring, which can dissipate energy through the energy-dissipating ring when the horizontal shock-absorbing spring is compressed, and the energy-dissipating ring is a viscoelastic high-damping material (such as high-damping rubber).

The top of the reaction force plate is flexibly connected to the outer lower part of the upper support plate through a dust-proof ring, and the outer circumference of the upper support plate and the lower support plate are provided with bolt holes to achieve a firm connection with the upper structure and the lower structure.

The maximum compression amount of the horizontal damping spring is the distance from the inner surface of the reaction force plate to the outer edge of the spherical slide plate when the horizontal damping spring is compressed.

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

The energy consumption principle of the self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing of the present invention:

On the basis of making full use of the energy dissipation performance of the shock-absorbing device’s own materials, the horizontal shock-absorbing spring is used to make the friction pendulum shock-isolation support horizontally displaced, and the limit plate is evenly stressed by the horizontal shock-absorbing spring; when the friction pendulum When the shock-absorbing bearing has a large horizontal displacement under the action of an earthquake, the horizontal shock-absorbing springs on both the compression side and the tension-bearing side provide reaction force, and the horizontal shock-absorbing spring makes the reaction force plate evenly stressed; when the friction pendulum shock-isolation support When the maximum allowable displacement is reached under the action of a strong earthquake, the horizontal shock absorbing spring on the compression side reaches the maximum compression, providing horizontal pressure, and the horizontal shock absorbing spring realizes deformation and energy dissipation by compressing the energy dissipation ring, while the horizontal shock absorbing spring on the tension side The horizontal tension is still provided, and the self-resetting ability of the friction pendulum shock-isolation support is doubled. At this time, the reaction force plate plays the role of the limit plate. Due to the function of the horizontal spring, the impact resistance of the self-resetting friction pendulum shock-isolation support is significantly improved, and the local limit plate is prevented from colliding with the hinge slider. damage, or even serious damage.

Compared with the traditional friction pendulum shock-isolation support, the friction pendulum shock-isolation support is provided with a shock-absorbing layer and a vertical shock-absorbing spring at the lower part of the spherical slide, which has significant deformation and frictional energy dissipation capabilities. The spherical slide plate is connected with the lower bearing plate through a shock absorbing layer and a vertical shock absorbing spring. Under earthquake action, when the hinged slider slides towards the edge of the spherical skateboard, the shock absorbing layer and the vertical damping spring under the spherical skateboard at the hinged slider are compressed and deformed to consume energy, and the shock absorber under the other side of the spherical skateboard The layer and the vertical damping spring are stretched and deformed to dissipate energy, which can realize vertical damping.

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

Beneficial effects: the benefits brought by the present invention and the achieved targets.

1. In the present invention, when the horizontal damping spring is compressed and deformed, the energy dissipation ring is used to realize the energy consumption of the compression deformation.

2. The present invention fully exerts the performance of the horizontal shock-absorbing spring, and doubles the energy dissipation performance on the basis of uniform stress on the reaction force plate.

3. The present invention is applicable to various engineering structures, and the three-dimensional shock absorption and isolation of the structure can be realized through horizontal shock absorbing springs, energy dissipation rings, and vertical shock absorbing layers.

Description of drawings

Fig. 1 is the sectional view of self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing of the present invention;

Fig. 2 is the top view of the self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing of the present invention;

Fig. 3 is the sectional view of A-A among Fig. 1;

Fig. 4 is the sectional view of B-B in Fig. 1;

Fig. 5 is a detailed view of member 13 in Fig. 1;

In the figure, there are: upper support plate 1; hinged slider 2; spherical slide plate 3; lower support plate 4; horizontal damping spring 5; Pad 9; dustproof ring 10; bolt hole 11; slider cavity 12; energy dissipation ring 13; horizontal guide rod 14.

detailed description

A self-resetting friction pendulum three-dimensional shock-absorbing and isolation bearing of the present invention comprises an upper bearing plate; a hinged slider; a spherical slide plate; a lower bearing plate; a horizontal damping spring; Shock absorbing spring; friction pad; dust ring; bolt hole; slider cavity; energy dissipation ring; guide rod.

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

The hinged slider is closely connected with the spherical slide plate through a friction pad, which is made of low-friction material with uniform thickness.

The upper support plate and the hinged slider are flexibly connected through the shock-absorbing layer, and the hinged slider can freely rotate along any angle in the slider cavity, and can realize vertical energy dissipation and shock absorption.

One end of the horizontal damping spring is connected to the upper support plate, and the other end is connected to the reaction force plate. The horizontal damping spring is provided with an energy dissipation ring, and the outer periphery is provided with a horizontal guide rod. The horizontal guide rod can freely expand and contract with the horizontal damping spring. And ensure that the shock absorbing spring deforms along the horizontal direction, when the horizontal shock absorbing spring is compressed, the energy dissipation ring can realize energy dissipation through compression deformation.

The top of the reaction force plate is flexibly connected to the lower side of the outer end of the upper support plate through a dust-proof ring, and the outer circumference of the upper support plate and the lower support plate are provided with bolt holes to achieve a firm connection with the upper structure and the lower structure.

The maximum compression amount of the horizontal damping spring is the distance from the inner surface of the reaction force plate to the outer edge of the spherical slide plate when the horizontal damping spring is compressed.

As a preference, the horizontal shock absorbing springs are evenly arranged along the center of the reaction force plate and the upper support plate to ensure that the horizontal shock absorbing springs and the reaction force plate are evenly stressed; the vertical shock absorbing springs are evenly arranged on the inner bottom surface of the lower support plate

Preferably, the two ends of the guide rod are flexibly connected to the inner side of the reaction force plate and the upper support plate respectively, and a certain rotation angle can occur.

Preferably, the shock-absorbing layer and the energy-dissipating ring are all viscoelastic high-damping materials, maintain an appropriate thickness, and use their strong deformation ability to realize energy dissipation.

Preferably, a certain gap is provided at the joint between the lowermost end of the slider cavity and the outermost end of the hinged slider to ensure that the hinged slider can rotate at a certain angle during the sliding process and maintain cooperative deformation with the upper support plate.

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

Below in conjunction with accompanying drawing, the present invention will be described in further detail:

As shown in Figure 1, a self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing according to the present invention mainly includes an upper bearing plate 1; a hinged slider 2; a spherical sliding plate 3; a lower bearing plate 4; Spring 5; counter force plate 6; shock absorbing layer 7; vertical shock absorbing spring 8; friction pad 9; dustproof ring 10; bolt hole 11;

As shown in Figures 1 and 4, the bottom of the inner cavity of the lower support plate 4 is provided with a shock absorbing layer 7 and a vertical shock absorbing spring 8, and the lower support plate 4 and the spherical slide plate 3 pass through the shock absorbing layer 7 and the vertical shock absorbing spring 8. Damping spring 8 is connected, and the inner bottom surface of lower support plate 4 and the lower bottom surface of spherical slide plate 3 are rough surfaces, which can strengthen the connection of shock absorbing layer 7 with lower support plate 4 and spherical slide plate 3. The hinged slider 2 is closely connected with the spherical slide 3 through a friction pad 9 . The upper support plate 1 and the hinged slider 2 are flexibly connected through the shock-absorbing layer 7, and the hinged slider 2 can freely rotate along any angle in the slider cavity 12, and can realize vertical energy dissipation and shock absorption.

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

As shown in Fig. 1 and Fig. 3, bolt holes 11 are uniformly arranged on the edge of the bottom plate of the lower support plate 4 to realize a firm connection with the lower structure. One end of the horizontal damping spring 5 is connected to the upper support plate 1, and the other end is connected to the reaction force plate 6. The horizontal damping spring 5 is provided with an energy dissipation ring 13, and the outer periphery is provided with a horizontal guide rod 14, which can be Freely expand and contract with the horizontal damping spring 5, and ensure that the horizontal damping spring 5 is deformed in the horizontal direction; when the horizontal damping spring 5 is compressed and deformed, the energy dissipation ring 13 can dissipate energy through the compression deformation.

As shown in FIG. 1 , the top of the reaction force plate 6 is flexibly connected to the underside of the outer end of the upper support plate 1 through a dustproof ring 10 , and the dustproof ring 10 can freely expand and contract horizontally and vertically. The maximum compression amount of the horizontal damping spring 5 is the distance from the inner surface of the reaction force plate 6 to the outer edge of the spherical slide 3 when the horizontal damping spring 5 is under pressure.

As shown in Figure 4, the energy dissipation principle of the self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing:

Compared with the traditional friction pendulum seismic isolation bearing, when the self-resetting friction pendulum three-dimensional seismic isolation bearing is subjected to loads such as horizontal earthquakes and typhoons, on the basis of making full use of the energy dissipation performance of the friction pad 9, the utilization level Shock-absorbing spring 5, so that when the friction pendulum shock-isolation bearing undergoes horizontal displacement, the limit plate 6 is evenly stressed by the horizontal shock-absorbing spring 5; when the friction pendulum shock-isolation The horizontal damping spring 5 on both the pressure side and the tension side provides the reaction force, and the horizontal damping spring 5 makes the reaction force plate 6 evenly stressed; when the friction pendulum shock-isolation support reaches the maximum allowable displacement under the strong earthquake The horizontal shock absorbing spring 5 on the side reaches the maximum compression to provide horizontal pressure, and the energy dissipation ring 13 realizes horizontal energy dissipation through compression deformation, while the horizontal shock absorbing spring 5 on the tensioned side still provides horizontal tension, which doubles the vibration isolation support of the friction pendulum. Seat self-resetting ability. At this time, the reaction force plate 6 plays a position-limiting role. Due to the effect of the horizontal damping spring 5, the impact resistance of the self-resetting friction pendulum shock-isolation bearing is obviously improved, and the reaction force plate 6 is prevented from being connected to the hinged slider 2. Local damage or even serious damage may occur due to collision.

The self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing is provided with a shock-absorbing layer 7 and a vertical shock-absorbing spring 8 at the lower part of the spherical slide 3, and has remarkable deformation and frictional energy dissipation capabilities. The spherical slide 3 is connected with the lower bearing plate 4 through the damping layer 7 and the vertical damping spring 8. The shock-absorbing layer 7 and the vertical shock-absorbing spring 8 at the bottom of the spherical slide 3 at block 2 dissipate energy through compression deformation, and the shock-absorbing layer 7 and the vertical shock-absorbing spring 8 under the other side of the spherical slide 3 consume energy through tension deformation, which can realize Vertical shock absorption.

It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (9)

1. A self-resetting friction pendulum three-dimensional shock-absorbing and isolating bearing is characterized in that: the shock-absorbing and isolating bearing comprises an upper bearing plate (1), a hinged slider (2), a spherical slide plate (3), a lower bearing Plate (4), horizontal shock absorbing spring (5), reaction force plate (6), shock absorbing layer (7), vertical shock absorbing spring (8), friction pad (9), dustproof ring (10), bolt hole (11), slider cavity (12), energy dissipation ring (13), guide rod (14); wherein, a concave blind hole is provided in the middle of the lower support plate (4), and The bottom of this concave blind hole is provided with a vertical damping spring (8), the top of the vertical damping spring (8) is connected with a spherical slide (3), and the top of the spherical slide (3) is provided with a hinged slider (2 ), the upper spherical surface of the hinged slider (2) is located in the slider chamber (12) at the lower part of the upper bearing plate (1); a reaction force plate (6) is arranged on the upper periphery of the lower bearing plate (4), and the horizontal The damping spring (5) is located between the reaction force plate (6) and the outer peripheral wall of the slider chamber (12). 2. A self-resetting friction pendulum three-dimensional shock-absorbing and isolating support according to claim 1, characterized in that: the upper support plate (1) and the hinged slider (2) are flexible through the shock-absorbing layer (7). connected, and the hinged slider (2) can rotate along any angle in the slider cavity (12), realizing vertical energy consumption and shock absorption, and the shock absorbing layer (7) is a viscoelastic high damping material (such as high damping rubber). 3. A self-resetting friction pendulum three-dimensional shock-absorbing and isolation bearing according to claim 1, characterized in that: the hinged slider (2) is closely connected with the spherical slide (3) through a friction pad (9), and the friction Pad (9) is a low friction material. 4. A self-resetting friction pendulum three-dimensional shock-absorbing and isolation bearing according to claim 1, characterized in that: the inner bottom surface of the lower bearing plate (4) and the lower bottom surface of the spherical slide plate (3) are rough surfaces, To increase the connection of the shock-absorbing layer (7) with the lower bearing plate (4) and the spherical slide plate (3). 5. A self-resetting friction pendulum three-dimensional shock-absorbing and isolating support according to claim 1, characterized in that: there are multiple horizontal shock-absorbing springs (5), which are respectively located on the outside of the slider cavity (12) and Between the inside of the reaction plate (6), one end is connected to the outer side of the slider cavity (12) at the bottom of the upper support plate (1), the other end is connected to the inside of the reaction plate (6), and the horizontal damping spring (5) is provided with horizontal guide rod (14), and horizontal guide rod (14) freely expands and contracts with horizontal damping spring. 6. A self-resetting friction pendulum three-dimensional shock-absorbing and isolating support according to claim 1, characterized in that: said horizontal shock-absorbing spring (5) is provided with an energy-dissipating ring (13), and the horizontal shock-absorbing spring ( 5) Energy can be dissipated through the energy-dissipating ring during compression, and the energy-dissipating ring (13) is a viscoelastic high-damping material (such as high-damping rubber). 7. A self-resetting friction pendulum three-dimensional shock-absorbing and isolating support according to claim 1, characterized in that: the top of the reaction force plate (6) and the lower part of the outer side of the upper support plate (1) pass through a dust-proof ring ( 10) Flexible connection, bolt holes (11) are provided on the periphery of the upper support plate (1) and the lower support plate (4), so as to realize firm connection with the upper structure and the lower structure. 8. A self-resetting friction pendulum three-dimensional shock-absorbing and isolating support according to claim 1, characterized in that: the maximum compression amount of the horizontal shock-absorbing spring (5) is from the inner surface of the reaction force plate to the spherical surface The distance from the outer edge of the skateboard. 9. A self-resetting friction pendulum three-dimensional shock-absorbing support according to claim 1, characterized in that: the bottom of the inner cavity of the lower support plate (4) is provided with a vertical shock-absorbing spring (8) The shock layer (7), the lower support plate (4) and the spherical slide plate (3) are connected with the vertical shock-absorbing spring (8) through the shock-absorbing layer (7).