论文部分内容阅读
选取四种混凝土本构关系模型,应用有限元分析软件ABAQUS建立高强方钢管高强混凝土轴压短柱有限元分析模型,再通过试验研究加以验证。结果表明:采用韩林海提出的约束混凝土本构关系模型的有限元计算结果与试验结果吻合较好。在此基础上,研究了含钢率、钢材屈服强度和混凝土强度对模型混凝土贡献比(CCR)及跨中截面钢管应力的影响。最后,提出了高强方钢管高强混凝土轴压短柱组合构件受力全过程应力-应变关系曲线表达式,计算结果与试验结果吻合较好,验证了公式的准确性。
Four kinds of concrete constitutive model are selected, and finite element analysis software ABAQUS is used to establish a finite element analysis model of high-strength square-cylinder high-strength concrete axial-compression short column, and then verified by experimental research. The results show that the finite element calculation results using the constitutive model of confined concrete proposed by Han Linhai are in good agreement with the experimental results. On this basis, the effects of the steel content, the yield strength of steel and the strength of concrete on the model concrete contribution ratio (CCR) and the mid-span steel pipe stress were studied. Finally, the expression of the stress-strain relation curve of the high-strength steel tube high-strength concrete axial-compressed short-pillar composite component subjected to stress is proposed. The calculated results are in good agreement with the experimental results, which verifies the accuracy of the formula.