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提出了一种基于地震动模拟的一致危险谱和条件均值谱的生成方法。该方法采用AB95_BC点源模型和基于有限断层的混合震源模型来生成人工模拟地震动,进一步对模拟地震动的反应谱进行统计分析,生成研究地区的一致危险谱及条件均值谱。为说明该文方法,选择缺乏历史地震资料的美国Memphis TN地区作为研究区域,模拟了该地区未来1000年可能发生的地震,并生成该地区50年超越概率为2%一致危险谱及相应的条件均值谱。最后考虑不同调幅方法、匹配均值和标准差等因素的影响,结合贪心优化算法,利用条件均值谱挑选地震动记录。
A method of generating consistent hazard spectrum and conditional mean spectrum based on ground motion simulation is proposed. In this method, AB95_BC point source model and mixed source model based on finite fault are used to generate artificial ground motion, and the response spectrum of simulated ground motion is further analyzed to generate the consistent hazard spectrum and the conditional mean spectrum. To illustrate this method, the Memphis TN area in the United States, which lacked historical seismic data, was selected as the study area to simulate possible earthquakes in the future 1000 years in this area and to generate a 2% Mean spectrum. Finally, considering the influence of different AM methods, matching mean and standard deviation, combined with the greedy optimization algorithm, the conditional vibration spectrum is selected.