应县木塔隔震性能分析

Isolation Performance of Ying County Wooden Pagoda

为了降低应县木塔的地震响应,采用基础隔震措施,基于ADINA有限元分析程序,对应县木塔的简化计算模型进行了基础隔震地震响应分析。结果表明,基础隔震措施能够延长结构的自振周期,避开场地的卓越周期;隔震效应与场地和隔震层阻尼比有关,需要综合考虑选取最佳场地和隔震层阻尼比。

In order to reduce the seismic response of Ying County Wooden Pagoda, base isolation measures are taken. Based on finite element analysis program ADINA, the base isolating seismic response is analyzed for simplified calculation model of County Wooden Pagoda. The results showed that base isolation measures can prolong the natural cycle of the structure and avoid the predominant period of the site. The isolation effect is related to the site and the damping ratio of isolation layer, which needs to comprehensively consider the selection of the best site and damp- ing ratio of isolation layer.