摘要
研究了近断层脉冲型地震动作用下超高层结构的影响。选取了近断层脉冲型地震、近断层无脉冲型地震动和普通地震动,用三类地震动对超高层结构进行了7度(0.1 g)罕遇水准地震作用下的动力时程分析,对比分析三类地震动作用下超高层结构的动力响应。结果表明:近断层脉冲型地震动的脉冲特性放大了超高层结构的响应;近断层脉冲型地震动作用下结构响应在加强层处的突变值大于无脉冲型地震动及普通地震动作用下的突变值;近断层脉冲型地震动作用下结构的最大层间位移角出现下移的趋势。
A super high-rise structure with the natural vibration period exceeding 6 s was selected to study the effects of Super High-rise Structure under near-fault pulse-type ground motions. First of all, near-fault pulsetype ground motions, non-pulse-type ground motions and general ground motions were selected. The spectrum properties and characteristics of three types of ground motion were analyzed and compared. Then, the three types of selected ground motion records were taken as inputs to carry out elastic-plastic time-history analysis under rare earthquake action on an out-of-code high-rise building in 7-degree seismic fortification region with basic ground acceleration of 0.1 g. And the results of internal force response and displacement response were compared and analyzed for the structure under different types of ground motions.The results show that the pulse characteristics of near-fault pulse-type ground motions amplify the response of super-high-rise structures;The mutation value of inter-story drift ratio and floor story shear of super-high-rise structure under near-fault pulsetype ground motions is greater than the value under non-pulse-type ground motions and general ground motions;the maximum inter-story drift angle of the structure has a trend to move down under the near-fault pulse-type ground motions.
作者
李敏
黄天璨
LI Min;HUANG Tiancan(Earthquake Engineering Research & Test Center of Guangzhou University,Guangzhou 510405,China;Guangdong Provincial Key Laboratory of Earthquake Engineering and Advanced Technology,Guangzhou University,Guangzhou 510405,China;Key Laboratory of Earthquake Resistance Earthquake Mitigation and Structural Safety Ministry of Education,Guangzhou University,Guangzhou 510405,China)
出处
《华南地震》
2018年第4期84-89,共6页
South China Journal of Seismology
基金
国家重点研发计划资助项目(2017YFC0703600)
关键词
近断层脉冲型地震动
超高层结构
动力分析
结构响应
Near-fault pulse-type ground motions
Super high-rise structure
Dynamic analysis
Structural response
