多腔钢管再生混凝土叠合短柱轴压参数分析

为了避免方形截面柱柱角突出问题,提高建筑空间利用率,提出了一种适用于异形柱的多腔钢管再生混凝土叠合短柱的新型构件形式,运用ABAQUS分析了叠合短柱的再生混凝土取代率、再生混凝土强度、钢管壁厚等参数对其荷载位移曲线、延性和刚度退化等力学性能的影响。研究结果表明：叠合短柱的承载力随着再生混凝土强度和钢管壁厚的增加有较大幅度的提升,但随着取代率的增加呈现下降趋势。叠合短柱的延性和刚度随着钢管壁厚的增加有一定的提升,但随着再生混凝土的取代率和强度的提高而降低。

Analysis of Axial Compression Parameters of Multi-Cavity Steel Tube Recycled Concrete Laminated Short Column

In order to avoid the problem of protruding column corners of square-section columns and improve the utilization rate of the building space, a new type of component form of multi-cavity steel tube recycled concrete composite short columns suitable for special-shaped columns is proposed, and ABAQUS is used to analyze the recycled concrete of composite short columns. The effects of parameters such as substitution rate, recycled concrete strength, and steel tube wall thickness on its mechanical properties such as load-displacement curve, ductility and stiffness degradation. The results show that the bearing capacity of the composite short column increases greatly with the increase of the strength of recycled concrete and the wall thickness of the steel pipe, but it shows a downward trend with the increase of the replacement rate. The ductility and stiffness of the composite short column increase with the increase of the steel pipe wall thickness, but decrease with the increase of the replacement rate and the strength of recycled concrete.