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地震作用下高架桥结构的脆弱性

, PP. 68-72

Keywords: 桥梁工程,高架桥结构,能力谱方法,脆弱性,非线性动力分析方法,地震

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Abstract:

？用能力谱方法和非线性动力分析方法分别建立了高架桥结构的脆弱性曲线。对用两种方法建立的脆弱性曲线进行比较发现:对于保护层混凝土剥落破坏状态,由两种方法分析的结果相差不大;对于纵筋屈曲和倒塌破坏状态,用能力谱方法分析的高架桥结构在给定地面运动强度下的失效概率偏低;用能力谱方法进行分析方便快速,但对于严重破坏状态分析精度较低;在应用非线性动力分析方法时需要对结构进行大量的动力时程分析,但结果精确可靠。

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