【作者】 张岩寿； 王亨； 单玉坤；

【Author】 Zhang Yanshou;Wang Heng;Shan Yukun;Tianjin University Research Institute of Architectural Design & Urban Planning;

【机构】 天津大学建筑设计研究院；

【摘要】 基于谐波叠加法编制了能够考虑行波效应和部分相干效应的多点地震动模拟程序,建立了以时程分析为基础的多点激励下大跨度空间结构地震计算方法,同时引入动态增量法对大跨度屋盖结构进行极限承载力分析,数值仿真分析了天津西站站房结构在一致激励、行波激励和多点激励下的地震响应和极限承载力。结果表明,行波效应和部分相干效应会影响屋盖结构杆件的内力;在一致激励、行波激励及多点激励下,结构的破坏模式均为由进入塑性后逐渐发展到一定程度的强度破坏,行波效应和部分相干效应会影响结构极限承载力,且其影响程度取决于视波速的选取。更多还原

【Abstract】 Based on the harmonic superstition method,a program is developed to simulate multi-support excitations considering traveling-wave effect and the partial coherence effect. The time history analysis method is established to conduct multi-support earthquake excitation. The incremental dynamic analysis method is introduced into the ultimate bearing capacity analysis of long span roof structure. The seismic response and ultimate bearing capacity of Tianjin West Station are numerically simulated under the uniform excitation,the traveling-wave excitation and the multisupport excitation. The simulated results show that the internal forces are influenced by the traveling-wave effect and the partial coherence effect. The destroy mode of Tianjin West Station is strength failure no matter what kind of input is concerned,but the ultimate bearing capacity is influenced. The influence level of the traveling-wave effect and the partial coherence is related with the velocity of the seismic.更多还原