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Investigation of the reliability of nonlinear modeling approaches to capture the residual displacements of RC columns under seismic loading

机译:地震作用下钢筋混凝土柱残余位移非线性建模方法可靠性研究

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摘要

The objective of this study is to develop modeling strategies to accurately model column behavior under seismic loading, including residual displacement. To this end, seven shaking table tests are considered to evaluate the accuracy of existing modeling approaches in capturing residual displacement, maximum displacement and base shear. It is found that, although the recommended modeling strategies can estimate maximum displacement and maximum base shear with reliable accuracy, but the discrepancy of their results corresponding to residual displacement are unacceptable. Following this, a modified concrete constitute model representing damage accumulation from cyclic loading is implemented for the fiber-element analysis. Analyses using modified concrete constitute model leads to decrease the error of modeling strategies in capturing residual displacement.
机译:这项研究的目的是开发建模策略,以准确地模拟地震荷载作用下的柱行为,包括残余位移。为此,考虑使用七个振动台测试来评估现有建模方法在捕获残余位移,最大位移和基础剪力方面的准确性。结果发现,尽管推荐的建模策略可以可靠地估计最大位移和最大基础剪力,但是它们与残余位移相对应的结果差异是不可接受的。此后,对纤维元素进行分析,以改进的混凝土构造模型来表示循环载荷造成的损伤累积。使用改进的混凝土构造模型进行分析可以减少建模策略在捕获残余位移方面的误差。

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