CN113123482A

CN113123482A - Self-resetting spherical groove energy dissipation and shock absorption support

Info

Publication number: CN113123482A
Application number: CN202110525635.3A
Authority: CN
Inventors: 万泽青; 杜琦
Original assignee: Yangzhou University
Current assignee: Yangzhou University
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-07-16

Abstract

The invention discloses a self-resetting spherical groove energy dissipation and shock absorption support which comprises an upper base, a lower base, an upper spherical surface sliding plate, a lower spherical surface sliding plate, a rotor and a spring, wherein the upper base is provided with a groove; grooves are formed in the lower end of the upper base and the upper end of the lower base, an upper spherical surface sliding plate and a lower spherical surface sliding plate are arranged in the grooves respectively, and a rotor is arranged between the upper spherical surface sliding plate and the lower spherical surface sliding plate; a plurality of springs are uniformly distributed between the upper base and the lower base, so that the building structure or internal equipment can be effectively protected from being damaged under strong earthquake impact.

Description

Self-resetting spherical groove energy dissipation and shock absorption support

Technical Field

The invention belongs to the technical field of bridge, building and water conservancy structure earthquake resistance in the building industry, and particularly relates to a self-resetting spherical groove energy dissipation and shock absorption support.

Background

Because the earthquake frequency is high, the earthquake magnitude is large, the distribution is wide, the disaster is serious, and people are difficult to accurately predict the coming of the earthquake for thousands of years, when the earthquake rapidly comes, the building cracks, and when the earthquake seriously comes, the building is inclined and collapsed, finally huge casualties are caused, the normal life of people is influenced, the original order of the society is disturbed, and irrecoverable economic loss is brought to the country.

Although earthquake cannot be prevented and predicted, with the development of science and technology, effective measures can be taken to greatly reduce the loss caused by earthquake, so that the research on the earthquake-resistant design of buildings is very important. The traditional earthquake-proof technology is to firmly connect the upper structure of the building with the foundation, namely to cover the house more firmly, and to pour thicker steel bars and more concrete, but the earthquake-proof effect is not ideal.

At present, the rubber shock insulation support is used more in engineering, and rubber has the defects of easy aging and incapability of self repairing, can cause frequent maintenance and even replacement, and has higher use cost, so that a novel energy dissipation shock absorption support is required to be provided.

Disclosure of Invention

The invention aims to provide a self-resetting spherical groove energy dissipation and damping support so as to reduce the natural vibration frequency of a structure and prolong the structure period.

The technical solution for realizing the purpose of the invention is as follows:

a self-resetting spherical groove energy dissipation and shock absorption support comprises an upper base, a lower base, an upper spherical sliding plate, a lower spherical sliding plate, a rotor and a spring;

grooves are formed in the lower end of the upper base and the upper end of the lower base, an upper spherical surface sliding plate and a lower spherical surface sliding plate are arranged in the grooves respectively, and a rotor is arranged between the upper spherical surface sliding plate and the lower spherical surface sliding plate; a plurality of springs are uniformly distributed between the upper base and the lower base.

Furthermore, the upper base adopts a sliding sheet filled with a polytetrafluoroethylene composite interlayer.

Furthermore, the lower base adopts a sliding sheet filled with a polytetrafluoroethylene composite interlayer.

Furthermore, the upper spherical surface sliding plate is made of polytetrafluoroethylene materials.

Furthermore, the lower spherical surface sliding plate is made of polytetrafluoroethylene materials.

Further, the spring is a memory alloy spring.

Further, the number of the springs is four.

Compared with the prior art, the invention has the following remarkable advantages:

(1) the method has flexibility, and can be flexibly applied to different design requirements: under the normal use state, can satisfy basic bearing capacity through the quantity and the size of adjustment support to satisfy different design requirements.

(2) Can move along any horizontal direction and move in a universal way, thereby dissipating energy and absorbing shock: under the action of horizontal earthquake, the support can move to any horizontal direction to consume earthquake energy without damaging the upper structure. A steel ball-shaped rotor and a spherical polytetrafluoroethylene sliding plate form a revolute pair to complete multidirectional rotation in the vertical and horizontal planes of the support, and horizontal exciting forces from all directions are reduced; the upper base and the lower base and the four memory alloy springs are used for achieving the function of resisting the vertical load of a building and the horizontal shearing force caused by earthquake excitation together, the limiting function is provided, the building structure or internal equipment can be effectively protected from being damaged under the strong earthquake impact, meanwhile, the object of earthquake-proof design is changed from the consideration of the whole building structure into the consideration of only the earthquake reduction and isolation device, and the design and construction are greatly simplified.

(3) Have from the reset function, this support possesses better from the reset function: the groove type design and the memory alloy spring can enable the support to return to the initial state, the self-resetting function is realized, the support can be used for multiple times, and frequent maintenance and replacement are avoided; after an earthquake occurs, the later maintenance cost can be reduced.

(4) Stability: the support has stable performance in the aspects of energy dissipation and shock absorption, has the characteristics of simple structure, less material consumption, stable and reliable shock absorption performance, long service cycle, maintenance-free performance and the like, is convenient to repair after an earthquake, does not need to consider the repair of a building structure, can quickly recover normal life and production after the earthquake, and can generate obvious social benefit and economic benefit.

(5) The support has wide application prospect, can better play the energy dissipation and shock absorption performance of the support for important public buildings and buildings in middle and primary schools in high-intensity areas, reduces the maintenance cost, can effectively prevent the support from generating overlarge overturning bending moment for the buildings with overhigh height and too thin and long appearance, dissipates the seismic energy, and reduces the structural seismic response.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural elevation view of the present invention.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

The invention relates to a self-resetting spherical groove energy dissipation and shock absorption support which comprises an upper base (adopting a filled polytetrafluoroethylene composite interlayer sliding sheet) 1, a lower base (adopting a filled polytetrafluoroethylene composite interlayer sliding sheet) 2, an upper spherical polytetrafluoroethylene sliding sheet 3, a lower spherical polytetrafluoroethylene sliding sheet 4, a steel spherical rotor 5 and a memory alloy spring 6.

Grooves are formed in the lower end (filled with polytetrafluoroethylene composite interlayer slip sheets) 1 of the upper base and the upper end (filled with polytetrafluoroethylene composite interlayer slip sheets) 2 of the lower base, and an upper spherical polytetrafluoroethylene sliding plate 3 and a lower spherical polytetrafluoroethylene sliding plate 4 are arranged in the grooves respectively. A spherical rotor 5 is arranged in the middle of the support, four memory alloy springs 6 are uniformly distributed around the spherical rotor 5, the four memory alloy springs 6 are arranged between the upper base 1 and the lower base 2, and the rotor 5 can be made of steel balls.

The invention adopts the upper spherical surface and the lower spherical surface, thereby not only ensuring the normal rotation and sliding functions of the support, but also realizing the damping and energy consumption functions and achieving the shock absorption function. The base of the support adopts a sliding sheet filled with a polytetrafluoroethylene composite interlayer, has the characteristics of small friction coefficient, large bearing capacity, good durability and the like, and can adjust the friction coefficient according to the use requirement so as to meet different design requirements.

When the support is relatively static, the support has enough rigidity and strength to bear vertical loads such as the dead weight of a building structure and the like under a normal working state, and the basic bearing capacity is met.

When the earthquake happens, no matter which direction the horizontal exciting force comes from, the spherical rotor can roll relatively freely in the groove because the surface friction coefficient of the groove is small and the friction coefficient can be adjusted, so that the kinetic energy generated by the earthquake is converted into potential energy to reduce the huge energy brought by the earthquake and protect the upper structure. Meanwhile, in the sliding process, the frictional resistance consumes a part of seismic energy. Therefore, the earthquake period is prolonged, and the shock absorption effect is achieved. The potential energy acts on the steel ball rotor to form restoring force, so that the rotor automatically resets and returns to the lowest point of the groove. The four memory alloy springs can also be deformed by stretching when an earthquake occurs, so that tensile stress is generated to reduce relative displacement and consume part of energy.

Based on subtract the isolation technique to building structure stability's apparent effect, this support has following advantage: firstly, the material consumption is less, and the economic benefit of saving resources is high. Secondly, the support can resist and consume horizontal exciting forces from all directions, so that various conditions in actual use are met; in addition, the support has self-resetting capability, so that the support can automatically reset after the earthquake action is finished, and frequent maintenance and replacement of the support are avoided.

The seismic isolation and reduction support has larger vertical bearing capacity, can safely support the dead load of an upper structure, has enough initial horizontal rigidity, resists the influence of wind or small earthquakes, reduces the horizontal rigidity of the seismic isolation and reduction support in middle and large earthquakes, prolongs the period of a structural system into a flexible seismic isolation system, plays a role in flexible connection with the ground, and can offset about 80% of energy of the earthquakes through the technology. The seismic isolation and reduction technology can obviously reduce the natural vibration frequency of the structure and prolong the structure period.

Claims

1. A self-resetting spherical groove energy dissipation and shock absorption support is characterized by comprising an upper base, a lower base, an upper spherical sliding plate, a lower spherical sliding plate, a rotor and a spring;

2. The self-resetting spherical groove energy-dissipating shock-absorbing support according to claim 1, wherein the upper base is a polytetrafluoroethylene-filled composite sandwich sliding sheet.

3. The self-resetting spherical groove energy-dissipating shock-absorbing support according to claim 1, wherein the lower base is a polytetrafluoroethylene-filled composite sandwich sliding sheet.

4. The self-resetting spherical groove energy-dissipating shock-absorbing support according to claim 1, wherein the upper spherical sliding plate is made of polytetrafluoroethylene.

5. The self-resetting spherical groove energy-dissipating shock-absorbing support according to claim 1, wherein the lower spherical sliding plate is made of polytetrafluoroethylene.

6. The self-resetting spherical groove energy-dissipating shock-absorbing support according to claim 1, wherein the spring is a memory alloy spring.

7. A self-resetting spherical groove energy-dissipating shock-absorbing seat according to claim 1, wherein the number of said springs is four.