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增量动力弹塑性分析方法的改进及其应用

, PP. 30-35

Keywords: 增量动力弹塑性分析方法,快速非线性时程分析,快速增量动力弹塑性分析方法,地震易损性曲线,筒中筒结构

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Abstract:

本文主要对增量动力弹塑性分析(IDA)方法的两个方面作了改进(1)以增量动力弹塑性分析方法的基本原理为基础,以快速非线性时程分析(FNA)方法为计算工具,形成快速增量动力弹塑性分析(FIDA)方法。(2)仅以IDA分析结果为基础,建立地震易损性曲线及地震破坏概率计算的离散型式。为了校验本文方法的可行性与有效性,应用增量动力弹塑性分析、模态增量动力弹塑性分析与快速增量动力弹塑性分析计算一个14层筒中筒结构试验模型,比较了用上述三种方法的计算误差与计算效率,比较了传统方法与本文方法计算该模型结构的地震易损性曲线的差别。

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