长期荷载作用下圆端形钢管混凝土力学性能

Mechanical properties of concrete-filled steel tubes with round ends under long-term load

采用有限元法,全过程分析了考虑长期荷载作用下时构件的应变-荷载曲线。基于有限元模型,分析了长期荷载作用下圆端形钢管混凝土柱的工作机理。结果表明:考虑长期荷载作用影响对圆端形钢管混凝土柱的内力分布、变形有较大影响,对承载力影响不大,且随着高宽比的增大,构件的峰值荷载增大,延性减小。

The finite element method was used to analyze the whole process of the strain-load curve of the member considering the long-term load.Based on the finite element model,the working mechanism of the round-end concrete-filled steel tube column under long-term load was analyzed.Research results show that the effect of long-term load has a greater impact on the internal force distribution and deformation of the round-end concrete-filled steel tube column,but has little impact on the bearing capacity,and as the aspect ratio increases,the peak load of the member increases and the ductility decreases.