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高强箍筋高强混凝土墩柱弯剪数值分析模型

DOI: 10.13197/j.eeev.2015.02.200.huacj.025, PP. 200-207

Keywords: 高强箍筋高强混凝土墩柱,弯剪数值分析,剪切破坏面,OpenSees,滞回曲线,变形成分

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Abstract:

在高强混凝土墩柱中配置高强度约束箍筋可有效提高其抗震能力,本文发展了适用于高强箍筋高强混凝土墩柱滞回性能模拟的弯剪数值分析模型.在普通钢筋混凝土墩柱弯剪数值分析模型的基础上,对22个具有典型弯剪破坏特征的高强箍筋高强混凝土柱试验结果进行分析,验证了Elwood剪切破坏面对高强箍筋高强混凝土墩柱的适用性.基于OpenSees数值分析平台建立了墩柱的弯剪数值分析模型,使用Elwood剪切破坏面监测墩柱的剪切破坏时刻.模拟了6个发生弯剪破坏的高强箍筋高强混凝土墩柱滞回曲线,并与试验结果进行对比.结果表明,模拟滞回曲线与试验结果吻合良好,数值模型对高强箍筋高强混凝土墩柱的强度、变形能力、残余位移等具有较好的模拟精度.模拟得到的弯曲、剪切及纵筋拔出等各变形成分也与试件的弯剪破坏特征吻合.

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