地震动频谱特性和持时对IDA结果影响的研究

潘志宏;洪博

振动与冲击 ›› 2014, Vol. 33 ›› Issue (5) : 155-159.

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PDF(1769 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (5) : 155-159.
论文

地震动频谱特性和持时对IDA结果影响的研究

  • 潘志宏, 洪博
作者信息 +

Study on the Influence of Spectral Characteristics and Duration of Ground Motions on the Results of IDA

  • PAN Zhi-hong , HONG Bo
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摘要

地震动记录的选择是增量动力分析的基础性工作。为了研究地震动记录的频谱特性和持时对增量动力分析结果的影响,总结了四种常用的计算地震动记录特征周期方法,建立了地震记录分组,进行了反应谱比较,以建立的地震记录分组为地震输入,结合算例进行了IDA分析,比较了IDA曲线和地震易损性曲线的差异。在此基础上,按两种地震持时原则输入进行IDA分析,分析了地震记录持时对IDA结果的影响。研究结果表明,地震记录频谱特性对IDA的数值大小和离散程度存在较大影响,足够的持时输入有助于获得稳定性好的IDA结果。

Abstract

Selection of ground motion records forms the basis for incremental dynamic analysis ( IDA ) . In order to study the influence of spectral characteristics and duration of ground motions on the results from IDA, four conventional methods to calculate the characteristic period of ground motions are introduced, by which the record groups of ground motion are selected, compared with the response spectrum . IDA is carried out in accordance with the selected inputs of ground motions, then the IDA curves and fragility curves are discussed. On this basis, the influnece of earthquake duration on IDA is analysed according to two duration principles. It is shown from the results that the Spectral characteristics of ground motions influences evidently not only the values but also the degree of dispersion of IDA, and sufficient duration time is good for the stability results of IDA.

关键词

地震动记录 / 增量动力方法 / 特征周期 / 地震持时

Key words

ground motion records / incremental dynamic methods / characteristic period / earthquake duration 

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导出引用
潘志宏;洪博. 地震动频谱特性和持时对IDA结果影响的研究[J]. 振动与冲击, 2014, 33(5): 155-159
PAN Zhi-hong;HONG Bo. Study on the Influence of Spectral Characteristics and Duration of Ground Motions on the Results of IDA[J]. Journal of Vibration and Shock, 2014, 33(5): 155-159

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