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型钢混凝土框架结构基于增量动力分析的抗震性能评估

, PP. 34-40

Keywords: 型钢混凝土框架,增量动力分析,曲线斜率,抗震性能评估

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Abstract:

增量动力分析(IDA)是进行结构抗震性能评估的一种有效方法。根据IDA方法的原理和特点,提出用其评估型钢混凝土(SRC)结构在不同强度地震作用下变形和延性能力的具体步骤,并将结构不同性能水平极限状态和IDA曲线的斜率联系起来,结合现有试验确定各性能水准对应的曲线斜率下降幅值。在所提混凝土和钢材本构模型的基础上,采用IDA方法对一规则SRC框架结构进行分析,研究结构在各性能水平的层间位移角和延性分布情况,单条和多条地震记录的IDA曲线表明,SRC框架在多条地震记录下均具有良好的抗震性能。

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