某L型不规则隔震结构减震分析与研究

Design and Research of L-Shaped Irregular Base Isolation Structure

将基础隔震引入不规则结构中,以某L型不规则结构为例,建立了三维基础隔震实体模型,通过调整隔震层刚心位置,使其与上部质心尽量重合,解决了不规则结构的扭转问题,对隔震与相应的非隔震结构进行不同地震波作用下的非线性动力时程分析.分析表明:采用基础隔震的L型不规则结构能够通过调整刚心与质心的相对位置来减轻扭转带来的震害;采用基础隔震的L型不规则结构可以获得较好的减震效果;结构在罕遇地震下能够保持较好的结构性能和使用功能.

The seismic performance of irregular structure become research hotspot in recent years, this paper introduces base isolations to the irregular structure, takes an L-shaped three-dimensional model as an example. Adjusting the stiffness center of isolation layer can make it consistent with the mass center ,which solves the torsion problem of irregular structure . Nonlinear dynamic time history analysis is also made to the structure. It is indicated in the research that it can reduce earthquake damage to the structure by adjus- ting the the stiffness center of isolation layer. It can achieve good effect to reduce the seismic forces. Also, it can keep better performance of structure and function under severe earthquake.