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地震动的波序特征研究

DOI: 10.13197/j.eeev.2015.04.71.mengfc.008, PP. 71-77

Keywords: 地震动,波序特征,截断比

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Abstract:

基于实际地震记录的统计分析,研究地震动的波序统计特征。实验研究表明,地震动的波序特征对土体变形发展有显著影响,其应变发展时程及残余变形主要受峰值及峰值前脉冲控制。通过真实地震动的统计分析研究其波序特征,结果表明峰值前后脉冲个数的对数与截断比呈线性递减关系,与震级呈线性递增关系。当截断比小于0.5时,峰值后脉冲个数大于峰值前脉冲个数,二者之比的范围为3.1~1.2,当截断比大于0.5时,峰值后与峰值前脉冲个数差别变小,二者之比为1.2~1.0。

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