现浇再生混凝土框架模型结构地震损伤评估
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摘要
基于完成的6层现浇再生混凝土(RAC)空间框架结构模型模拟地震试验,提出了再生混凝土框架结构地震破坏等级7级划分标准,明确了基于结构极限状态的抗震性能水平.采用变形和能量线性组合的双重破坏准则对再生混凝土框架结构进行抗震能力评估.结果表明:基于变形和能量线性组合的双参数地震损伤模型,能够很好地评估地震作用下再生混凝土框架结构的损伤发展过程,为基于性能的再生混凝土框架结构抗震优化设计提供了依据.
Based on the shaking table tests of a six-storey frame model structure made of recycled aggregate concrete(RAC),seven levels of standard for the grade classification of earthquake damage of the RAC frame structure were preliminarily put forward.The seismic performance level based on the structural damage limit state of the RAC frame structure was defined.Furthermore,a two-parameter seismic damage model based on the deformation and the accumulated energy dissipation was suggested to evaluate the aseismic capacity of the RAC frame structure.The results show that the two-parameter seismic damage model can well assess the damage process of the RAC frame structure system.The analysis results provide a basis for the performance-based aseismic optimum design of the RAC frame structures.
引文
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