层间隔震框架结构抗震性能分析
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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.
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.
引文
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[3]张敏.建筑结构抗震分析与减震控制[M].成都:西南交通大学出版社,2007.
[4]中华人民共和国建设部,国家质量监督检验检疫总局.GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2002:113.
[5]刘文光,周福霖,庄学真,等.柱端隔震夹层橡胶垫力学性能试验研究[J].地震工程与工程振动,1999,19(3):121-126.
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