摘要
偏心隔震结构在地震动作用下,除发生平动外,还将发生平-扭耦联的反应,从而使震害加重,尤其是隔震层较易发生破坏。本文利用自行编制的分析程序,对偏心多塔隔震结构进行了数值分析,在此基础上,提出偏心多塔结构同基础隔震的设计方案。数值模拟计算结果表明,对偏心单塔隔震结构,在地震作用下采用多塔同基础隔震的方案,能大幅度降低结构隔震层的扭转反应,其中最大扭转加速度最少降低55%,最大扭转角最少降低84%。可见,在条件许可时,将相邻偏心单塔结构采用同基础隔震的方案,对提高隔震效果是有利的。
Besides lateral responses, eccentric isolated structures under earthquake action have lateral-torsional responses, this causes the base to be destroyed. In this article, the common isolation effect of eccentric multiple building is analyzed by self-developed software. Utilizing the software, the single building with base isolation and the multiple building with common isolation are simulated. The results show that, using the method of multiple building with common isolation under seismic force can significantly decrease the torsional effects of the base. Under this situation the max torsional acceleration may be decreased at least 55%, while the max torsional displacement may be decreased at least 84%. In conclusion, under the permitted conditions, using the method of common isolation may enhance the isolation effect.
出处
《地震工程与工程振动》
CSCD
北大核心
2007年第6期230-235,共6页
Earthquake Engineering and Engineering Dynamics
基金
广东省科技计划项目(20055190030)
科技部重大基础研究项目(2004CCA03300)
关键词
偏心结构
多塔
同基础隔震
隔震效果
eccentric structure
multiple building
common base-isolation
isolation effects
