基于高维模型表达的RC框架地震易损性分析

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地震易损性分析是地震灾害分析的重要内容,可以比较全面地评价结构的抗震性能,因此,快速有效地获得结构的地震易损性非常重要.本文以一RC框架为对象,同时考虑结构材料和地震动的不确定性,以中心复合设计法建立试样样本对,用OpenSees软件建模并对样本进行非线性分析,建立了基于高维模型表达的结构近似模型,继而采用蒙特卡洛模拟得到结构易损性曲线;并且将结果与响应面法得到的易损性曲线进行比对.分析结果表明:所建立的基于高维模型表达的结构近似模型精度较高,结果可靠,减少了非线性分析计算和样本对的选取量,有效提高地震易损性分析的时效性,具有一定的工程应用价值.
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