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近断层强震记录基线校正及不确定性分析

, PP. 63-69

Keywords: 汶川地震,基线校正,近断层,强震记录

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Abstract:

采用汶川地震近断层强震记录,分析了近断层记录基线校正的原则、不同基线校正方法的特点以及基线校正的不确定性因素。根据基线校正原则提出了基线校正的一般步骤,对比分析了在合理分界时间点范围内选择不同组时间分界点进行基线校正后各组记录之间的地震动参数和反应谱特性。结果表明,已有的各种基线校正方法并不能较好地得到准确的确定性基线校正结果,满足基线校正的一般原则也会得到不同的校正结果,但是合理地进行基线校正后,对加速度和速度时程相关的地震动参数和不同形式的反应谱特性的影响很小。

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