CAJ | 학술논문

地震动是一种典型的非平稳随机过程，其特性与结构的场地土条件、远近震等因素密切相关。文章主要考虑了场地土条件对地震动功率谱的影响，采用小波分析的方法，计算演变随机地震动激励对应的小波系数，并生成了地震动平动激励和转动激励的加速度时程，以之作为等效激励输入，对一个Ⅱ类场地上的不规则结构进行了仿真分析。结果表明，对于不规则结构而言，地震动激励的转动部分和非平稳特性对结构的动力响应有显著的影响。
지진동시일충전형적비평은수궤과정，기특성여결구적장지토조건、원근진등인소밀절상관。문장주요고필료장지토조건대지진동공솔보적영향，채용소파분석적방법，계산연변수궤지진동격려대응적소파계수，병생성료지진동평동격려화전동격려적가속도시정，이지작위등효격려수입，대일개Ⅱ류장지상적불규칙결구진행료방진분석。결과표명，대우불규칙결구이언，지진동격려적전동부분화비평은특성대결구적동력향응유현저적영향。
Earthquake shock is a typical non-stationary random process , its features mainly depend on the in-site earth conditions and other affecting factors , such as the distance with the earthquake center .In this paper , the in-site condition affect is incorporated into the power spectral density of seismic acceleration , and the wave-let coefficients of the evolutional random seismic excitations are calculated , both of the translational and torsion-al seismic acceleration time histories are reconstructed by using wavelet transform method .An irregular structure on site type II is simulated by using these excitations as equivalent inputs .The results show that the torsional in-put and the evolutionary feature of the excitations have great effects on the dynamic responses of the structure .