多腔钢管再生混凝土叠合短柱轴压性能分析

为了研究多腔钢管再生混凝土叠合短柱轴压性能,设计了一种多腔钢管再生混凝土叠合短柱,应用ABAQUS对多腔钢管再生混凝土叠合短柱在轴向压力下的破坏模态、荷载位移曲线、受力过程、相互作用和轴压性能退化等性能进行了研究.结果表明:在轴压荷载下,多腔钢管再生混凝土叠合短柱弹性范围较长,极限承载力高,延性和刚度较好.受力过程中,多腔钢管再生混凝土叠合短柱的钢筋再生混凝土部分和钢管再生混凝土部分受力协同,钢管与核心再生混凝土之间的接触应力和钢管与外部钢筋再生混凝土之间的接触应力均集中在四个边角处和短边处,长边处的接触应力不明显.多腔钢管再生混凝土叠合短柱在轴压荷载作用下,能保持较好的延性、耗能能力和刚度.

Finite Element Analysis for Axial Behavior of Multi-cell Short Columns Composed of Recycled Concrete Filled Steel Tube

In order to study the axial compression performance of multi-cavity steel tube recycled concrete short column, a multi-cavity steel tube recycled concrete short column was designed. The failure mode, load displacement curve, stress process, interaction and axial degradation of the composite short column under axial pressure are studied by ABAQUS. The main research results are as follows: Under axial load, multi-cell columns composed of concrete-filled steel tube has longer elastic range, high bearing capacity, good ductility and rigidity. In the process of loading, the recycled concrete part of rebar and steel tube of multi-cell columns composed of concrete-filled steel tube are under the coordination of loading. During the stress process, the contact stress between the steel tube and the core recycled concrete and the contact stress between the steel tube and the external recycled concrete was concentrated at the four corners and the short edges, while the contact stress at the long edges was not obvious. Under axial load, multi-cell columns composed of concrete-filled steel tube can maintain good ductility, energy dissipation capacity and rigidity.