摘要
采用随频率变化的视波速代替随意给定的视波速,并在随机场的模拟中引入相位差谱来考虑地震动的频率含量非平稳性.用谱表示法按不同的设计烈度生成了时间-空间变化的非平稳人工随机场,可用于大跨度空间结构多点激励的地震动输入.
An apparent wave velocity varying with the frequency of seismic wave was adopted rather than an arbitrary one. The phase difference spectrum was introduced to consider the non-stationary properties of frequency contents in simulating artificial random field. The non-stationary random field on hard site considering the temporal-spatial variation was simulated by the way of spectral representation method. This random field can be used as the input of earthquake ground motion of the seismic response analysis of large-span spatial structures considering the effect of multi-supported excitation.
出处
《地震学报》
CSCD
北大核心
2002年第4期407-412,共6页
Acta Seismologica Sinica
基金
国家自然科学基金 (59978001)资助项目
