摘要
本文对地震行波三向正交分量分别独立作用和联合作用下的大跨度空间网格结构的地震响应(包括结构控制点的位移、杆件内力、柱底弯矩等 )进行了数值分析 ,结果表明 :与一致地震振动相比 ,地震动的行波效应可使大跨度空间网格结构的控制点位移增大 2 1%、柱脚弯矩增大 79%、杆件内力增大 10 0 %,因此 ,在大跨度空间结构的抗震分析中必须进行详细的抗震分析。
In this paper, the numerical analysis for the seismic responses of long-span lattice structures under the independent or jointed excitations of 3-D earthquake traveling-waves is performed, especially for the displacements at the control points,the inner force of the bars and the moments at the bottom of the columns. The numerical results show that the seismic responses of the long-span spatial lattice structures may be increased by 100% due to the traveling-waves effects, comparing with that under the excitations of the earthquakes ground motion not considering the traveling-wave effect. A conclusion is given that the detailed seismic analysis must be carried out in the design process of the long-span lattice structures.
出处
《地震工程与工程振动》
CSCD
北大核心
2002年第5期71-76,共6页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金资助项目 (项目编号 :5 0 2 780 6 4)
