方中空夹层钢管混凝土横向局压性能研究

Research on Performance of Square CFDST Under Lateral Partial Compression

为研究方中空夹层钢管混凝土的横向局压性能,利用ABAQUS软件建立了非线性有限元分析模型,同时以压杆与试件外边长比和空心率为参数,进行了6个试件的试验研究,分析比较了试件破坏形态、荷载-位移曲线、荷载-应变曲线和承载力模拟结果与试验结果的差异及其产生的原因。结果表明:横向局压荷载作用下方中空夹层钢管混凝土具有较好的力学性能;有限元模拟得到的方中空夹层钢管混凝土横向局压性能总体上与试验结果吻合良好。

To investigate the performance of square concrete-filled double-skin steel tube （CFDST） under lateral partial compression, a nonlinear finite element analysis model was developed by using ABAQUS software. At the same time, six specimens with the variation of width ratio between bearing member and specimen and hollow ratio were tested. The failure pattern, load-displacement curve, load-strain curve and bearing capacity of the specimens were compared with the tested results and the causes of the differences between simulation results and tested results were also analyzed. The results show that square CFDST under lateral partial compression has good mechanical behavior, and the predicted responses of square CFDST under lateral partial compression by the finite element simulation are generally in good agreement with the tested results.