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基于全寿命费用的隔震结构抗震性能分析

, PP. 244-250

Keywords: 隔震结构,全寿命费用,抗震性能,随机分析

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Abstract:

本文提出一个基于全寿命费用的抗震性能指标,将建筑物的抗震性能表示为建筑物的预期损失与全寿命费用的比值,比值越大,则建筑物的抗震性能越差。对采用叠层橡胶支座的基础隔震结构,给出结构的各破坏状态下的层间变形角和各项损失计算方法,采用随机分析和动力可靠度计算,得到隔震结构在不同地震强度下的条件失效概率,据此求解隔震结构的预期损失和全寿命费用。针对一个隔震工程实例,对比分析了该工程隔震和不隔震时基于全寿命费用的抗震性能,结果表明,隔震结构的抗震性能系数远小于不隔震结构,说明隔震结构在保护结构安全和减小震后损失方面要优于不隔震结构。

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