| 考虑强地面运动持时的概率分布对桥梁结构概率地震需求的影响 |
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| 引用本文： | 陈亮,李建中,盛光祖.考虑强地面运动持时的概率分布对桥梁结构概率地震需求的影响[J].公路交通科技,2009,26(2). |
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| 作者姓名： | 陈亮 李建中 盛光祖 |
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| 作者单位： | 同济大学,桥梁工程系,上海,200092 |
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| 摘 要： | 根据桥梁所在场地条件，选择合理的谱加速度衰减关系生成场地中值加速度反应谱，选择合理的持时衰减关系，抽取持时样本，生成2个匹配场地中值加速度反应谱的人工波库，对1座钢筋混凝土桥墩进行非线性动力时程分析，将持时对于EDP概率预计和PSDM的影响与幅值和频谱的影响进行解耦。得到以下结论：（1）考虑持时的分布与否对于EDP概率预计的影响不大，但可以有效地减小离散度，而且对能量需求参数的影响大于对位移需求参数。（2）当选择结构第1模态周期谱加速度和合理的能量需求参数分别作为地面运动强度参数和EDP建立概率地震需求模型时，可以通过选择地震波来考虑持时的影响。
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| 关 键 词： | 桥梁工程 强地面运动持时 持时概率分布 概率地震需求模型 基于性能的地震工程 |
Influence of Probability Distribution of Duration of Earthquake Strong-motions on Probabilistic Seismic Demand of Bridge |
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| CHEN Liang,LI Jianzhong,SHENG Guangzu.Influence of Probability Distribution of Duration of Earthquake Strong-motions on Probabilistic Seismic Demand of Bridge[J].Journal of Highway and Transportation Research and Development,2009,26(2). |
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| Authors: | CHEN Liang LI Jianzhong SHENG Guangzu |
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| Institution: | Department of bridge engineering;Tongji University;Shanghai 200092;China |
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| Abstract: | The median acceleration response spectrum and samples of duration were obtained from the reasonable spectral acceleration attenuation relationship and duration attenuation relationship respectively according to site conditions.Two bins of artificial accelerograms compatible with the median acceleration response spectra were generated.The influences of duration,frequency spectrum and amplitude on EDP probability estimates and PSDM were uncoupled.The conclusions are drawn that(1)EDP probability estimates are ... |
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| Keywords: | bridge engineering duration of earthquake strong-motions probability distribution of duration probabilistic seismic demand model performance-based earthquake engineering |
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