摘要
对某重要办公楼进行了基础隔震设计,研究了其强震下的隔震效果;基于时程分析法,建立了在飞机撞击下的评价点绝对加速度反应谱,分析了飞机撞击区域应力的变化。研究结果表明,评价点的反应谱峰值出现的位置由隔震前的高频段挪至隔震后的低频段;撞击区域应力有所降低;当飞机的速度小于145 m/s时,隔震层的位移小于规范规定的最大容许位移。
This paper performed a base-isolated design for a office building, and systematically investigated the performance of the isolated building under strong ground motion. Based on time-history analysis, the paper established the absolute acceleration response spectrum of the evaluation impact point during aircraft crash, and analyzed the change of stress on the crash area. The research results show that the response spectrum peak of the evaluation point moved from high frequency band in the base-fixed case to low frequency band in the base-isolated case, meanwhile, the stress on the crash area for the isolated building is reduced significantly; on the condition that the speed of the aircraft is less than 145 m/s, the drift of isolation layer is less than the maximum allowable of the standard provisions.
出处
《华南地震》
2015年第4期17-24,共8页
South China Journal of Seismology
基金
973项目(2012CB723304)
125科技支撑计划(2012BAJ07B02)
国家基金项目(91315301-07)
长江学者和创新团队发展计划(IRT13057)
关键词
基础隔震
飞机撞击
时程分析
反应谱
Base isolation
Plane crash
Time history analysis
Response spectrum
