钢管混凝土轴压组合刚度有限元分析

摘要

根据钢管混凝土短柱轴压试验数据建立并调整相应的有限元模型，通过有限元非线性分析得到钢管混凝土的荷载应变关系曲线，计算构件的轴压组合刚度。对比有限元模型的计算结果以及现有规范公式计算得到的轴压刚度结果，并进行误差分析。%According to the experimental data of axial compression test of concrete filled steel tube, we established and adjusted the finite element model. By the model we got load strain curve of concrete filled steel tube and calculated the axial stiffness of concrete filled steel tube. In the end, we discussed the difference of the axial stiffness calculated by finite element analysis and rule formulae.