CN115492253A - A friction pendulum shock-isolation bearing - Google Patents

Abstract

The invention discloses a friction pendulum shock-isolation support, which relates to the technical field of energy dissipation and shock absorption in civil engineering, and comprises an upper seat plate and a lower seat plate, an installation space is formed between the upper seat plate and the lower seat plate, and a slider is installed in the installation space mechanism; the top of the lower seat plate is provided with an arc-shaped concave surface, the bottom of the slider mechanism is provided with a first arc-shaped surface to fit the arc-shaped concave surface, the top of the slider mechanism is provided with an arc-shaped convex surface, and the bottom of the upper seat plate is provided with a second The two arc-shaped surfaces fit together with the arc-shaped convex surface; the first arc-shaped surface and the arc-shaped convex surface of the slider mechanism are provided with a ball positioning device, which is used to measure the distance between the slider mechanism and the upper seat plate and the lower seat plate The relative displacement between them; a three-way force measuring device is also installed on the slider mechanism, and the three-way force measuring device is used to measure the force of the friction pendulum shock-isolation support. The invention can monitor the displacement and stress of the friction pendulum, so as to obtain the working state of the friction pendulum and achieve the monitoring effect.

Description

A friction pendulum shock-isolation bearing

technical field

The invention relates to the technical field of energy dissipation and shock absorption in civil engineering, in particular to a friction pendulum shock-isolation support.

Background technique

Earthquake is a terrible natural disaster, which often causes damage to engineering facilities such as houses, and also causes serious casualties. my country is one of the countries with high frequency of earthquakes in the world. In order to reduce the loss of people and property caused by earthquakes, it is necessary to strengthen and improve the anti-seismic fortification capacity of buildings.

Friction pendulum is a kind of friction isolation bearing developed in the field of building structure isolation in recent years. Based on its concave geometry and surface friction characteristics, the friction pendulum makes the structure slide on the concave surface when it encounters vibrations such as earthquakes and through friction loss. dissipate energy. Under the earthquake, the seismic isolation device absorbs the seismic energy through large deformation, and provides a certain damping for the structure. At the same time, the structural period becomes longer, which reduces the response of the upper structure. The friction pendulum support is mainly composed of upper and lower arc-shaped slide plates and a slider in the middle. The material of the sliding concave surface is different according to the friction coefficient. When the earthquake force is greater than the static friction force, the slider starts to move along the concave surface similar to a single pendulum. Sliding, the restoration force formed by the component force of gravity and the friction force makes the friction pendulum reset itself. Existing studies believe that the friction coefficient of the friction pendulum is related to factors such as temperature and speed, and these factors will affect the performance of the friction pendulum to a certain extent. If you want to realize the uninterrupted post-earthquake function of the friction pendulum, you must first find a way to judge whether its function is maintained in a preserved state.

Some post-earthquake damage assessment methods currently used in foreign countries mainly use probes, cameras, etc., but these methods have large errors, and they are observed after the earthquake. It is difficult to accurately measure all the forces of a device under the earthquake. - The displacement history is obtained.

Therefore, it is urgent to provide a novel friction pendulum shock-isolation bearing to solve the above-mentioned problems existing in the prior art.

Contents of the invention

The object of the present invention is to provide a friction pendulum shock-isolation support to solve the above-mentioned problems in the prior art, which can monitor the displacement and stress of the friction pendulum, so as to obtain the working state of the friction pendulum and achieve the monitoring effect.

To achieve the above object, the present invention provides the following scheme:

The invention provides a friction pendulum shock-isolation bearing, which includes an upper seat plate and a lower seat plate, an installation space is formed between the upper seat plate and the lower seat plate, and a slider mechanism is installed in the installation space; The top of the lower seat plate is provided with an arc-shaped concave surface, the bottom of the slider mechanism is provided with a first arc-shaped surface to fit the arc-shaped concave surface, the top of the slider mechanism is provided with an arc-shaped convex surface, and the upper seat The bottom of the plate is provided with a second arcuate surface to fit the arcuate convex surface; the first arcuate surface of the slider mechanism and the arcuate convex surface are provided with a ball positioning device, and the ball positioning device It is used to measure the relative displacement between the slider mechanism and the upper seat plate and the lower seat plate; the slider mechanism is also equipped with a three-way force-measuring device, and the three-way force-measuring device is used to measure the The force of the friction pendulum isolation bearing is described.

Preferably, the slider mechanism includes an upper slider and a lower slider arranged from top to bottom, the top of the upper slider is provided with the arc-shaped convex surface, and the bottom of the lower slider is provided with the second slider. a curved surface.

Preferably, friction mechanisms are provided between the arcuate concave surface and the first arcuate surface and between the arcuate convex surface and the second arcuate surface.

Preferably, the friction mechanism includes a first friction plate and a second friction plate, both of the first friction plate and the second friction plate are arc-shaped plates; plate, a second friction plate is attached and fixed on the first arc-shaped surface, and the first friction plate on the arc-shaped concave surface is attached to the second friction plate on the first arc-shaped surface; A second friction plate is attached and fixed on the arc-shaped convex surface, and a first friction plate is attached and fixed on the second arc-shaped surface, and the second friction plate on the arc-shaped convex surface and the second arc-shaped surface The first friction plate fits together.

Preferably, the first friction plate is a stainless steel plate, and the second friction plate is a polytetrafluoroethylene plate.

Preferably, the ball positioning device includes a displacement sensor and a ball, one end of the displacement sensor is in contact with the ball, and the other end is fixedly mounted on the first arc surface or the arc convex surface, and the ball is in contact with the ball. The arc-shaped concave surface or the second arc-shaped surface is in contact, and the arc-shaped concave surface or the second arc-shaped surface can drive the ball to rotate.

Preferably, there are multiple displacement sensors, and the contact points between the multiple displacement sensors and the balls are located on the same horizontal plane, and on this horizontal plane, the length of the arc connecting any two of the contact points is equal.

Preferably, the displacement sensor includes a signal receiver, a signal transmission rod, a signal amplifier and a Hall sensor, the signal receiver is provided with a contact point for contacting the ball, and the signal receiver passes the signal The transmission rod is connected to the signal amplifier, and the Hall sensor is fixed on the signal amplifier for receiving displacement signals;

The signal receiver is a circular drum, and the outer surface of the circular drum is provided with anti-slip protrusions.

Preferably, the bottom of the upper slider is provided with an anti-slip protrusion, the top of the lower slider is provided with a groove matching the anti-slip protrusion, and the anti-slip protrusion is inserted into the groove to realize the The connection between the upper slider and the lower slider, and the height of the anti-slip protrusion is greater than the height of the groove;

The three-way force-measuring device is installed on the outer edge of the anti-slip protrusion.

Preferably, the three-way force measuring device includes a first strain gauge and a second strain gauge arranged vertically, wherein the first strain gauge is arranged horizontally, and the second strain gauge is arranged vertically;

The installation gaps of the first strain gauge and the second strain gauge are filled with waterproof material.

Compared with the prior art, the present invention has achieved the following beneficial technical effects:

The present invention adds a ball position measuring device and a three-way force measuring device on the basis of the ordinary friction pendulum shock-isolation support, and the relative displacement between the friction pendulum slider mechanism, the upper seat plate and the lower seat plate can be measured by using the ball position measuring device For monitoring, the three-way force measuring device can be used to measure the force situation in all directions of the friction pendulum shock-isolation support, so as to obtain the working state of the friction pendulum and achieve real-time monitoring effect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the structural representation of the friction pendulum shock-isolation bearing in the embodiment of the present invention;

Fig. 2 is the radial sectional view of upper slider, lower slider position in Fig. 1;

Fig. 3 is a longitudinal sectional view of the ball positioning device in Fig. 1;

Fig. 4 is a radial sectional view of the ball positioning device in Fig. 1;

Fig. 5 is the front view of the three-way force measuring device in Fig. 1;

Fig. 6 is a side view of the three-way force measuring device in Fig. 1 .

Among them, 1. Lower seat plate; 2. Stainless steel plate; 3. Second friction plate; 4. Lower slider; 5. Upper slider; 6. Upper seat plate; 7. Ball measuring device; 8. Displacement sensor; 9 , connecting bolt; 10, Hall sensor; 11, fixed ring; 12, signal receiver; 13, signal transmission rod; 14, signal amplifier; 15, ball; 16, three-way force measuring device; 17, strain gauge; 18 , waterproof material; 19, the end of the turntable.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The object of the present invention is to provide a friction pendulum shock-isolation support to solve the above-mentioned problems in the prior art, which can monitor the displacement and stress of the friction pendulum, so as to obtain the working state of the friction pendulum and achieve the monitoring effect.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one

As shown in Figures 1 to 6, this embodiment provides a friction pendulum shock-isolation bearing, which includes an upper seat plate 6 and a lower seat plate 1, and an installation space is formed between the upper seat plate 6 and the lower seat plate 1. A slider mechanism is installed; the top of the lower seat plate 1 is provided with an arc-shaped concave surface, and the bottom of the slider mechanism is provided with a first arc-shaped surface to fit the arc-shaped concave surface, and the first arc-shaped surface and the arc-shaped concave surface can be Generate friction; the top of the slider mechanism is provided with an arc-shaped convex surface, and the bottom of the upper seat plate 6 is provided with a second arc-shaped surface to fit the arc-shaped convex surface, and friction can be generated between the arc-shaped convex surface and the second arc-shaped surface ; The first arc-shaped surface of the slider mechanism and the arc-shaped convex surface are provided with a ball positioning device 7, and the ball positioning device 7 is used to measure the relative displacement between the slider mechanism and the upper seat plate 6 and the lower seat plate 1; A three-way force-measuring device 16 is also installed on the block mechanism, and the three-way force-measuring device 16 is used to measure the force of the friction pendulum shock-isolation bearing. Wherein, it should be noted that both the upper seat plate 6 and the lower seat plate 1 are mature technologies in the field, and can be selected according to specific work needs.

In this embodiment, the ball positioning device 7 can be used to monitor the relative displacement between the friction pendulum slider mechanism and the upper seat plate 6 and the lower seat plate 1, and the three-way force measuring device 16 can be used to measure the friction pendulum. The force in the direction can be obtained to obtain the working state of the friction pendulum and achieve real-time monitoring effects; the monitoring results can be compared with the results of the previous test data to quickly obtain the damage of the structure and realize the device. Self-diagnosing and judging the repair plan based on this, so as to achieve the effect of intelligent monitoring, and real-time monitoring of the epicenter before the earthquake can be achieved.

In this embodiment, the slider mechanism includes an upper slider 5 and a lower slider 4 arranged from top to bottom, the top of the upper slider 5 is provided with an arc-shaped convex surface, and the bottom of the lower slider 4 is provided with a first arc-shaped surface; friction mechanisms are provided between the arc concave surface and the first arc surface and between the arc convex surface and the second arc surface.

Wherein, the friction mechanism includes a first friction plate and a second friction plate 3 capable of friction, and both the first friction plate and the second friction plate 3 are arc-shaped plates, which are connected with the slider mechanism or the upper seat plate 6 and the lower seat plate 1. The shapes are matched; specifically, a first friction plate is fitted and fixed on the arc-shaped concave surface of the top of the lower seat plate 1, and a second friction plate 3 is fitted and fixed on the first arc-shaped surface of the bottom of the lower slider 4. The first friction plate on the concave surface fits with the second friction plate 3 on the first arc surface; the arc convex surface at the top of the upper slider 5 fits and fixes a second friction plate 3, and the second friction plate 3 on the bottom of the upper seat plate 6 A first friction plate is attached and fixed on the two arc-shaped surfaces, and the second friction plate 3 on the arc-shaped convex surface is attached to the first friction plate on the second arc-shaped surface.

In this embodiment, the first friction plate is preferably a stainless steel plate 2, and the second friction plate 3 is preferably a polytetrafluoroethylene plate, which can improve wear resistance; and the friction coefficient of the stainless steel plate 2 and the polytetrafluoroethylene plate is low, It can ensure relative sliding between the upper seat plate 6 and the upper slider 5 and between the lower seat plate 1 and the lower slider 4 . Among them, the stainless steel plate 2 is connected to the upper seat plate 6 and the lower seat plate 1 by welding, and the polytetrafluoroethylene plate is connected to the upper slider 5 and the lower slider 4 by embedding or bonding, or other materials can be used according to the needs of the work. connection method. Further, the first friction plate and the second friction plate 3 of other materials can also be selected according to specific work needs.

In this embodiment, as shown in Figure 3 and Figure 4, the ball positioning device 7 includes a displacement sensor 8 and a ball 15, and the top of the upper slider 5 and the Teflon plate on it are provided with a mounting groove, The bottom of the lower slider 4 and the upper Teflon plate are provided with an installation groove; the displacement sensor 8 is horizontally installed in the installation groove, one end of which is in contact with the ball 15, and the other end is fixedly installed on the upper surface through the connecting bolt 9. In the bolt hole provided on the installation groove of the slider 5 or the lower slider 4; the ball 15 can protrude from the installation groove and fit closely with the stainless steel plate 2 on the upper seat plate 6 or the lower seat plate 1 to ensure the The sliding friction force between them is greater than the rolling friction force to avoid relative slippage, so that the stainless steel plate 2 can drive the ball 15 to rotate.

Wherein, the displacement sensor 8 is a mature existing technology in the field, and can be selected according to specific work needs; it mainly includes a signal receiver 12, a signal transmission rod 13, a signal amplifier 14 and a Hall sensor 10, and the signal receiver 12 is provided with a useful At the point of contact with the ball 15, the signal receiver 12 is connected with the signal amplifier 14 through the signal transmission rod 13, and the Hall sensor 10 is fixed on the end of the turntable of the signal amplifier 14 for receiving the displacement signal; when the ball 15 rotates, It can drive the signal receiver 12 of the displacement sensor 8 to rotate, thereby driving the signal amplifier 14 to rotate through the signal transmission rod 13 , and the Hall sensor 10 determines the displacement distance by receiving the number of turns of the turntable of the signal amplifier 14 .

Further, the signal receiver 12 is a circular drum, and a plurality of anti-slip protrusions are arranged on the outer surface of the circular drum. The anti-slip protrusions are preferably tooth-shaped anti-slip protrusions, forming a gear-shaped circular drum to increase the contact with the ball. The coefficient of friction between 15 and 15 avoids loosening and sliding during contact with the ball 15.

In this embodiment, a plurality of displacement sensors 8 are provided, and the contact points where the signal receiver 12 and the ball 15 contact on the plurality of displacement sensors 8 are located on the same horizontal plane, and on this horizontal plane, the circular arc connected by any two contact points equal in length. Wherein, the number of displacement sensors 8 can be selected according to needs, and can be provided with 2, 3, etc. In this embodiment, 3 displacement sensors 8 are preferably provided to form a three-axis ball positioner.

In this embodiment, the signal receivers 12 of the three displacement sensors 8 are connected through the fixing ring 11 , and the ball 15 is located in the fixing ring 11 , and the ball 15 is fixed by contacting the three displacement sensors 8 and the fixing ring 11 .

In this embodiment, the bottom of the upper slider 5 is provided with an anti-slip protrusion, and the top of the lower slider 4 is provided with a groove matching the anti-slip protrusion, and the anti-slip protrusion is inserted into the groove to realize the upper slider 5 and the sliding The connection of the block 4, and the height of the anti-slip protrusion is greater than the height of the groove, so that the anti-slip protrusion of the upper slider 5 can contact the bottom of the groove of the lower block 4 to generate vertical stress; wherein, the anti-slip protrusion A three-way force-measuring device 16 is installed at the position where the outer edge is connected with the lower slider 4, and a plurality of three-way force-measuring devices 16 can be arranged according to specific work needs.

In this embodiment, as shown in Figure 5 and Figure 6, a mounting groove is provided at the outer edge of the anti-slip protrusion, and the three-way force measuring device 16 is installed in the mounting groove, and is distributed on four sides, so that Reach three-way force measurement effect; Wherein, three-way force measurement device 16 comprises two strain gauges 17, namely vertically arranged first strain gauge and second strain gauge, wherein, the first strain gauge is arranged horizontally to measure horizontal shear force, The second strain gauge is arranged vertically to measure the vertical axial force; the first strain gauge and the second strain gauge are filled with waterproof material 18 in the installation gap in the installation groove. In this embodiment, the strain gage 17 is used to measure the stress, and the strain gage 17 is sealed with a waterproof material 18 to reduce the probability of damage to the strain gage 17; wherein, the waterproof material 18 can be selected according to specific work needs.

The working principle of the friction pendulum shock-isolation bearing in this embodiment is as follows:

When an earthquake occurs, the earthquake will cause the slider mechanism to move horizontally, resulting in relative slippage with the stainless steel plate 2. During this process, the stainless steel plate 2 and the ball positioning device 7 will move relative to each other, driving the ball 15 to rotate, and the ball 15 will drive the displacement. The signal receiver 12 of the sensor 8 rotates, and the Hall sensor 10 determines the displacement distance by receiving the number of turns of the turntable of the signal amplifier 14 .

When an earthquake occurs, the earthquake causes the slider mechanism to move vertically, and the stress generated between the lower slider 4 and the upper slider 5 is monitored by the three-way force measuring device 16 .

In the present invention, the relative slip displacement is determined based on the rolling distance of the ball. As long as the energy consumption limit of the friction pendulum itself is not exceeded under the influence of the earthquake, the range of the ball will not be exceeded.

The scheme of the present invention is concise and reasonable, and is improved on the basis of the good shock isolation performance and control ability of the friction pendulum. It can achieve real-time monitoring of the epicenter before the earthquake, and only needs to consider the three-way force measuring device and the ball position measuring device inside the friction pendulum. The installation method and the impact on the original structure, and the three-way force measuring device and the ball position measuring device are easy to manufacture, the materials are simple and easy to obtain, and it is easy to promote, and has a good development prospect.

It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. . Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the invention, and any reference sign in a claim shall not be construed as limiting the claim concerned.

In the present invention, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention; meanwhile, for those of ordinary skill in the art, according to the present invention The idea of the invention will have changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A friction pendulum shock-isolation bearing, comprising an upper seat plate and a lower seat plate, an installation space is formed between the upper seat plate and the lower seat plate, and a slider mechanism is installed in the installation space; it is characterized in that : the top of the lower seat plate is provided with an arc-shaped concave surface, the bottom of the slider mechanism is provided with a first arc-shaped surface to fit the arc-shaped concave surface, and the top of the slider mechanism is provided with an arc-shaped convex surface, The bottom of the upper seat plate is provided with a second arc-shaped surface to fit the arc-shaped convex surface; the first arc-shaped surface of the slider mechanism and the arc-shaped convex surface are provided with a ball position measuring device, and the ball The position measuring device is used to measure the relative displacement between the slider mechanism and the upper seat plate and the lower seat plate; a three-way force measuring device is also installed on the slider mechanism, and the three-way force measuring device is used for It is used to measure the force of the friction pendulum shock-isolation bearing. 2. The friction pendulum shock-isolation bearing according to claim 1, characterized in that: the slider mechanism comprises an upper slider and a lower slider arranged from top to bottom, and the top of the upper slider is provided with The arc-shaped convex surface, the bottom of the lower slider is provided with the first arc-shaped surface. 3. The friction pendulum shock-isolation bearing according to claim 1, characterized in that: between the arc-shaped concave surface and the first arc-shaped surface and between the arc-shaped convex surface and the second arc-shaped surface There is a friction mechanism between them. 4. The friction pendulum shock-isolation bearing according to claim 3, characterized in that: the friction mechanism comprises a first friction plate and a second friction plate, and both the first friction plate and the second friction plate are Arc-shaped plate; a first friction plate is attached and fixed on the arc-shaped concave surface, a second friction plate is attached and fixed on the first arc-shaped surface, and the first friction plate on the arc-shaped concave surface and the The second friction plate on the first arc-shaped surface is attached to each other; a second friction plate is attached and fixed on the arc-shaped convex surface, and a first friction plate is attached and fixed on the second arc-shaped surface. The second friction plate on the convex convex surface fits with the first friction plate on the second arc surface. 5. The friction pendulum shock-isolation bearing according to claim 4, characterized in that: the first friction plate is a stainless steel plate, and the second friction plate is a polytetrafluoroethylene plate. 6. The friction pendulum shock-isolation bearing according to claim 1, characterized in that: the ball positioning device includes a displacement sensor and a ball, one end of the displacement sensor is in contact with the ball, and the other end is fixedly installed on the On the first arc-shaped surface or the arc-shaped convex surface, the ball is in contact with the arc-shaped concave surface or the second arc-shaped surface, and the arc-shaped concave surface or the second arc-shaped surface can drive the ball turn. 7. The friction pendulum shock-isolation bearing according to claim 6, characterized in that: there are multiple displacement sensors, and the contact points of multiple displacement sensors and the balls are located on the same horizontal plane, and in the On the horizontal plane, the arcs connected by any two contact points are equal in length. 8. The friction pendulum shock-isolation bearing according to claim 6 or 7, characterized in that: the displacement sensor includes a signal receiver, a signal transmission rod, a signal amplifier and a Hall sensor, and the signal receiver is provided with a useful At the point of contact with the ball, the signal receiver is connected to the signal amplifier through the signal transmission rod, and the Hall sensor is fixed on the signal amplifier for receiving displacement signals; The signal receiver is a circular drum, and the outer surface of the circular drum is provided with anti-slip protrusions. 9. The friction pendulum shock-isolation bearing according to claim 2, characterized in that: the bottom of the upper slider is provided with an anti-skid protrusion, and the top of the lower slider is provided with an anti-skid protrusion that matches the anti-skid protrusion A groove, the anti-skid protrusion is inserted into the groove to realize the connection between the upper slider and the lower slider, and the height of the anti-skid protrusion is greater than the height of the groove; The three-way force-measuring device is installed on the outer edge of the anti-slip protrusion. 10. The friction pendulum shock-isolation bearing according to claim 1 or 9, characterized in that: the three-way force measuring device includes a first strain gauge and a second strain gauge arranged vertically, wherein the first strain gauge The gauge is arranged horizontally, and the second strain gauge is arranged vertically; The installation gaps of the first strain gauge and the second strain gauge are filled with waterproof material.

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