多点输入下球面网壳结构地震响应研究

Seismic response analysis of spherical shells under multiple support excitation

以某球面屋盖网壳结构为例,对其进行多点输入下的地震响应分析,并与单点输入下的动力时程计算结果进行对比分析,探讨了不同的视波速对于球面网壳表面应力分布的影响、多点输入与单点输入下结构响应的差异以及不同视波速对结构响应及节点位移时程的影响,归纳出多点输入下结构的响应特点,得到行波效应对结构的影响规律。

Taking the spherical shells as an example, the seismic response analysis is carried out under multiple-support excitation. The results from multiple-support excitation are compared with the results under the simple-support excitation, and presented are the influences of surface stress under different apparent wave velocity. Finally according to the difference of structure response under the multiple-support excitation and single support excitation, obtained are the influence of apparent wave velocity and displacement of nodes under the multiple-support excitation.