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根据1988年12月7日斯皮塔克地震和1991年4月21日拉恰地震及其余震加速度图的分析,详细研究了这些地区在不同强度地震时,不同距离上地基振动加速度频率的一些形成特点。建立了不同震级地震近场区的概率频谱体系,确定了频谱随距离的转换关系。取得了斯皮塔克地震主震时地基振动加速度的预期频谱和对时间函数的估计,对高加索不同震源区(达吉斯坦、拉恰和斯皮塔克震中区)地基振动的概率频谱进行了对比分析。在预测加速度最大幅度反应谱的基础上以随机振动的方法检验了频谱模型研究的准确性。
Based on the analysis of the Spitatk Earthquake on December 7, 1988 and the Raccia Earthquake on April 21, 1991 and the aftershock acceleration maps of other aftershocks, the frequencies of the ground vibration acceleration frequencies at different distances at different intensities of earthquakes in these areas are studied in detail Formed characteristics. The probabilistic frequency spectrum system of near earthquakes in different magnitude earthquakes is established, and the conversion relation of spectrum with distance is determined. The expected frequency spectrum and the estimation of the time function of the ground vibration acceleration during the main Spike earthquake were obtained. The probability spectra of the ground vibrations in different focal regions of the Caucasus (Dagestan, Racha and Spitak epicenter) Comparative analysis. Based on the prediction of the maximum acceleration response spectrum, the accuracy of the spectral model was tested by random vibration method.