中文摘要：

考虑地震动的随机性和频率与强度非平稳性，通过理论分析，提出了一般随机地震动模型，并给出了确定模型参数的原则和方法。该模型以地震动强度、地震动能量以及地震动持时等宏观指标作为控制随机地震动模型参数的指标，而对其内在的频谱组成等指标只要求满足一般地震动的特征。该模型可以用于描述平稳随机过程、强度非平稳随机过程以及强度和频率完全非平稳随机过程。通过与常用功率谱模型的比较，验证了该模型的合理性。

英文摘要：

A versatile stochastic seismic ground motion model named general stochastic seismic ground motion （GSSGM） model accounting for uncertainty and time variation of frequency contents of real seismic excitations is formulated in this paper. The principle and the method of determining model parameters are given. The seismic ground motion intensity and energy are used as controlling indexes to determine the model parameters, and, frequency composition is agreed with the characteristics of seismic ground motions. GSSGM model is appropriate to simulate the stationary, intensity nonstationary and fully nonsationary processes. Compared with conventional power spectrum model, the rationality of GSSGM model is examined and certified.