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规范规定采用时程分析法时应选用相当数量与统计意义相符的地震加速度时程曲线。鉴于实际工程中与拟建场地同震源的原始地震纪录较少,合成满足一定振动特性的人工地震波参与计算显得十分必要。根据人工地震动合成原理,利用规范反应谱v2.0程序和Simqke_gr程序生成拟合标准反应谱的地震波,并将其应用于某典型超限底框结构实际工程的弹性动力时程分析中。实例分析结果表明:采用程序合成的人工地震波,在概率意义上有一定代表性,能够很好地拟合于规范反应谱,同时使用方便、可靠,可用于工程实际中。
The code stipulates that when using the time history analysis method, a large number of seismic acceleration time history curves should be selected according to statistical significance. In view of the fact that there are few original seismic records in the same project with the hypocenter of the proposed site, it is necessary to synthesize synthetic seismic waves that meet certain vibration characteristics. According to the synthetic principle of artificial ground motion, the standard response spectrum v2.0 program and Simqke_gr program are used to generate the seismic wave fitting the standard response spectrum and applied to the elastic dynamic time history analysis of a typical overrun underframe structure. The case study shows that the artificial seismic wave synthesized by the program has certain representativeness in probability and can be well fitted to the normalized response spectrum. Meanwhile, it is easy to use and reliable and can be used in engineering practice.