中文摘要：

为研究弦支穹顶结构在多点地震动激励下的响应情况,采用大质量法通过ANSYS有限元软件对40、80和120m跨度的弦支穹顶结构进行时程分析,列出结构在不同视波速行波激励下的地震响应,并与一致激励下的地震响应进行了对比分析。结果表明,考虑地震动行波效应后,结构杆件应力随视波速的增大而减小,越来越接近一致激励下的杆件应力;且对弦支穹顶结构不同位置的杆件的应力值影响有所不同。结果表明,对于大跨度弦支穹顶结构,在计算随机地震响应分析时,必须考虑行波效应的影响;而且应对可能出现的地面视波速进行全面分析。

英文摘要：

In order to investigate the seismic responses of the Suspen-dome under multiple-support excitation,the time-history analysis are carried on the Suspen-dome with 60 m span using large mass method in ANSYS,the seismic responses of the Suspen-dome under excitation of traveling waves with different apparent velocities were also studied,and compared with the seismic responses under uniform excitation. The results show that wave passage effect on the axial stresses of bars of the Suspen-dome structure decrease with the increase of the apparent velocity of the traveling wave,close to the axial stresses of bars under uniform excitation; and the effect is different for the axial stresses of bars at different positions. Some conclusions are drawn that the wave traveling effect of the ground motion must be considered for the random seismic response analysis of the long-span Suspen-dome structures; the comprehensive analysis should be performed for possible apparent wave velocities.