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本文将地震作用由随机场简化为随机过程，针对软土地基的动力特征，结合可靠度理论与随机振动理论，运用累积损伤模型对场地非确定的地震响应进行了动力可靠性分析。
In this paper, the seismic action is simplified from random field to random process. According to the dynamic characteristics of soft ground, combined with the reliability theory and random vibration theory, the dynamic reliability of the unsteady seismic response of the site is analyzed by the cumulative damage model.