CFRP钢管混凝土轴压短柱混凝土本构关系

摘要

在钢管混凝土基础上对核心混凝土的本构关系进行修正,得出了适用于CFRP钢管混凝土新型构件的核心混凝土本构关系.使用该混凝土的本构关系,利用ANSYS有限元分析软件对CFRP钢管混凝土轴压短柱构件的应力应变关系进行了数值模拟;并作了相应的8根CFRP钢管混凝土和4根钢管混凝土试件的轴压短柱承载力试验研究.数值分析所得曲线与试验所得的曲线吻合良好,证明经过修正的混凝土本构关系是一种适合于CFRP钢管混凝土轴压构件数值分析的混凝土本构关系.%The constitutive relation of core concrete for concrete-filled CFRP-steel tubular columns is put forward based on modified constitutive relation of core concrete of concrete-filled steel tube,and a commercial ANSYS FE software is employed for the simulation of the relation of stress and strain of concrete-filled CFRP-steel tubular short columns with axial compression.An experimental investigation was performed on 12 specimens,including 8 concrete-filled CFRP-steel tubes and 4 concrete-filled steel tubes.Numerical analysis results curves are consistent with the test data,which proves that the provided constitutive relation of concrete is fit for the concrete-filled CFRP-steel tubular short columns with axial compression.