摘要
阐述了隔震支座的力学性能,推导了隔震系统的动力平衡方程,利用大型有限元软件SAP2000在7度罕遇EL-Centro地震波作用下对隔震层置于底层、三层及八层柱顶的层间隔震框架结构进行动力时程分析,包括楼层位移、剪力和加速度,并对计算结果与传统抗震结构进行比较分析。研究结果表明,层间隔震具有良好的隔震效果,但隔震层位置的高低对层间隔震的减震效果有较大的影响,隔震层位置越低,减震效果越明显。
The mechanical properties of seismic isolation bearings were described. Dynamic equilibrium equations of the isolation system were derived. Large-scale structural finite element analysis software SAP2000 was employed to make a dynamic time-history analysis of the storey seismic isolation bearings placed on layer 1,3 and at 8 interval of 7 degrees in the severe earthquake of EL-Centro wave, including the floor displacement, shear force and acceleration. The calculation results were compared with the non-isolated structure. The research results show that storey seismic isolation bearings has a significant shock damping effect; that the location of the storey seismic isolation has a great impact on the shock damping effects; that the lower the location of the isolation layer,the better the damping effect is.
出处
《福建工程学院学报》
CAS
2011年第6期579-584,共6页
Journal of Fujian University of Technology
基金
福建省自然科学基金项目(2009J01258)
关键词
隔震支座
层间隔震
SAP2000
时程分析
isolation bearing
storey seismic isolation
SAP2000
time history analysis
