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本文简要评述了制作拟合反应谱的人造地震波的方法,对非平稳扰动下的反应提出一个等效平稳的近似最大反应分布。利用此近似分布从谱强度因子G_0=0.0126英尺~2/秒~3、过滤参数ξ_g=0.64和ω_g=15.6 1/秒的金井清谱转换的均值谱,与Housner的平均速度谱一致;这说明对于实际地震加速度图,其功率谱是与均值速度反应谱相对应的。因此,可据此近似分布来求功率谱与反应谱之间的转换关系。利用由目标反应谱转换的功率谱可较简便地制作拟合反应谱的人造地震波。人造地震波的反应谱与目标谱的比较表明,这样求得的人造地震波具有足够的精度,可用于地震反应分析和Monte Carlo模拟计算。
This paper briefly reviews the method of making an artificial seismic wave that fits the response spectrum, and proposes an equivalent stationary maximum response distribution for reactions under nonstationary disturbances. Using this approximate distribution, the mean spectrum of the gold-well spectrum conversion from the spectral intensity factor G_0 = 0.0126 ft./second -3, filter parameter ξ_g = 0.64, and ω_g = 15.61 1/sec is consistent with Housner’s average velocity spectrum; this shows that For actual seismic acceleration maps, the power spectrum corresponds to the mean velocity response spectrum. Therefore, the approximate distribution can be used to find the conversion relationship between the power spectrum and the response spectrum. Using the power spectrum converted from the target response spectrum, an artificial seismic wave that fits the response spectrum can be easily created. The comparison of the response spectrum of the artificial seismic wave with the target spectrum shows that the artificial seismic wave thus obtained has sufficient accuracy to be used for seismic response analysis and Monte Carlo simulation calculation.