多点输入下的大跨空间结构地震响应分析

摘要

Seismic is the space changes in essence, due to the loss of the limitations and the coherence of seismic wave velocity, and the heterogenous geologic site condition can lead that the earthquake excitation of each structure supporting points appeared differences ,in space structure of larger spatial scale this effect is more significant. Analysis results show that taking the multi-point input of seismic oscillation into consideration is essential for large span space structure.%本文介绍了多点输入下的结构分析计算方法，以某大跨空间结构为例，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分析计算结果进行对比，结果显示多点输入中危险杆件的数量多于单点输入下的危险杆件数量，多数杆件的内力也有一定幅度增大。分析结果表明对于大跨空间结构，考虑地震动的多点输入是十分必要的。