Soft contact limit mechanism for isolation layers

Abstract

The invention relates to a soft contact limit mechanism for isolation layers and belongs to the technical field of engineering structure seismic reduction and isolation. The soft contact limit mechanism for isolation layers comprises limiters, buffers and a reaction support. Both the limiters and the buffers are elastic devices. The limiters are more rigid than the buffers. One end of each limiter is fixed on the reaction support, the other end of each limiter is fixedly connected to one end of the corresponding buffer, and a preserved distance is reserved between the other end of the buffer and the upper floor of an isolation layer. The reaction support is connected with the bottom of the isolation layer. When an earthquake causes large lateral displacement of the isolation layer, the upper floor of the isolation layer collides with the buffers to deform the buffers and the limiters. The buffers are small in rigidity, high impact upon the isolator is avoided during contact, and damage of building structures by impacting is avoided. In addition, the limiters are large in deformation and deforming stiffness, and certain lateral displacement of the isolation layer is allowed and can also be controlled within a safety range.

Description

technical field [0001] The invention relates to a shock-isolation layer soft-contact limit mechanism, which belongs to the field of engineering structure shock absorption and shock isolation technology, and is mainly used for the protection of foundation shock-isolation devices of buildings such as houses and bridges. Background technique [0002] There are two most commonly used forms of foundation isolation structure, one is rubber bearing isolation structure, and the other is sliding isolation structure. Due to its excellent performance in earthquakes, it is more and more widely used. When investigating the earthquake-isolated buildings after the earthquake, it was found that the earthquake-isolation layer collided with the foundation. Due to the irregularity of the seismic wave, the low-frequency part of the earthquake wave has the possibility of resonating with the structure, so that the earthquake-isolation layer The displacement exceeds the original design value, caus...

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Problems solved by technology

The first two limit measures, due to the high contact stiffness during the collision, will bring impact to the shock-isolation layer, and when the impact is large, it will cause structural damage; the third measure, because the rubber layer When it is thick, the deformation is large, and it cannot play a limiting effect. When the rubber layer is thin, after the rubber layer is compressed, it will still bring impact to the upper structure

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