潘岳怡,谢夜玉,牟剑英,等. 广西靖西MS5.2地震强震动观测及分析[J]. 华北地震科学,2020, 38(S2):53-60. doi:10.3969/j.issn.1003−1375.2020.S2.009.
引用本文: 潘岳怡,谢夜玉,牟剑英,等. 广西靖西MS5.2地震强震动观测及分析[J]. 华北地震科学,2020, 38(S2):53-60. doi:10.3969/j.issn.1003−1375.2020.S2.009.
PAN Yueyi,XIE Yeyu,MOU Jianying,et al. Strong Ground Motion Characteristics of Guangxi Jingxi MS5.2 Earthquake[J]. North China Earthquake Sciences,2020, 38(S2):53-60. doi:10.3969/j.issn.1003−1375.2020.S2.009.
Citation: PAN Yueyi,XIE Yeyu,MOU Jianying,et al. Strong Ground Motion Characteristics of Guangxi Jingxi MS5.2 Earthquake[J]. North China Earthquake Sciences,2020, 38(S2):53-60. doi:10.3969/j.issn.1003−1375.2020.S2.009.

广西靖西MS5.2地震强震动观测及分析

Strong Ground Motion Characteristics of Guangxi Jingxi MS5.2 Earthquake

  • 摘要: 对记录到2019年11月25日广西靖西市MS5.2地震的测震台网数据进行加速度记录的仿真转换,有效增加加速度数据量以利于对地震动特征对比分析。在对观测记录进行数据处理后,利用插值方法绘制峰值加速度分布图,并与现场宏观评定烈度图进行对比;选取两种衰减关系模型对靖西MS5.2地震的加速度记录进行分析表明,两种模型在置信区间内对土层数据拟合良好,对基岩数据明显高估;将峰值加速度统一调整校正至II类场地后,两种衰减关系模型在置信区间内均表现出较好的拟合效果;计算了2个近台记录反应谱,其特征与现场房屋轻微裂缝的情况相符。

     

    Abstract: The velocity waveform data of the Jingxi MS5.2 earthquake in Guangxi province on November 25, 2019 recorded by the seismic network was converted to acceleration waveform using simulation so as to effectively increase the amount of acceleration data for the comparative analysis of ground motion characteristics. The interpolation method was used to draw the peak acceleration distribution map, which is compared with the field macroscopic evaluation intensity map. Two attenuation relationship models were selected to analyze the acceleration records of the earthquake. The two models fit the soil data well in the confidence interval, and overestimate the bedrock data obviously. When the peak acceleration was uniformly adjusted and corrected to class II site, the two decay relation models show good fitting effect in the confidence interval. The response spectra of two near platform records were calculated, which are consistent with the situation of slight cracks in the field buildings.

     

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