考虑反应谱变异特性的人工合成地震波

在以往产生拟合反应谱的人工地震的方法中，目标反应谱通常采用建筑抗震设计规范给出的标准反应谱。根据其定义，标准反应谱仅仅反映了结构反应谱的均值特性。事实上，诺将地震动视为随机过程，则反应谱也是具有随机性的。因此，上述人工波的合成方法，忽略了反应谱的随机性，则生成的人工波并不能充分体现地震动的随机特性。鉴于此，由随机振动理论提出一种产生人工波的方法，可以同时考虑反应谱的均值特性和变异特性。

Simulation of Ground Motions Considering Variability of Response Spectra

In the previous methods of generating artificial ground motions compatible with response spectrum, the goal spectrum usually is the standard response spectrum specified in the code for seismic design of buildings. According to its definition, the standard response spectrum only reflects the mean property of response spectra of structures. In fact, if ground motion is a stochastic process, the response spectrum also is random. So, the methods above, by disregarding this point, fail to produce artificial earthquake waves that completely show the randomness of ground motion. In view of this, based on the random vibration theory, this paper presents an approach to simulation of ground motions, which takes into account both mean and variation properties of response spectrum.