Seismic isolation bearings equipped with vertical progressive collapse prevention

CN122304552APending Publication Date: 2026-06-30NANTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANTONG UNIV
Filing Date
2026-03-27
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing friction pendulum seismic isolation bearings are insufficient in resisting progressive collapse under extreme working conditions, and existing improvement schemes are complex, costly, or have poor reliability.

Method used

A seismic isolation bearing with anti-vertical progressive collapse capability was designed. By setting a combination of shear keys and vertical springs inside the bearing, the horizontal stiffness is improved by the shear keys being sheared off under extreme conditions, and the vertical springs provide vertical support to avoid overall structural instability.

Benefits of technology

While maintaining horizontal seismic isolation performance, it effectively improves the resistance to progressive collapse, ensures that the triggering mechanism is simple and reliable, and avoids overall structural instability and progressive collapse.

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Abstract

This invention relates to the field of bearing technology and discloses a seismic isolation bearing with anti-vertical progressive collapse capability, comprising an upper mounting plate, a slider, a lower sliding plate, a concave plate with a shear key, and a vertical spring. Under normal use and seismic conditions, the shear key engages with the limiting groove, and the slider slides freely along the spliced ​​continuous sliding surface to achieve horizontal seismic isolation. When the vertical load on the bearing exceeds the design threshold, the shear key breaks, and the slider and lower sliding plate are pressed into the receiving cavity. Horizontal displacement is restricted, the horizontal stiffness of the bearing increases sharply, and the vertical spring buffers the vertical impact and provides support. This invention adopts a purely mechanical triggering mechanism, taking into account both horizontal seismic isolation and anti-vertical progressive collapse performance. It has a simple structure, high reliability, and wide applicability.
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