水平低周反复荷载作用下钢管混凝土框架柱的非线性有限元分析

Nonlinear FE Analysis of Concrete-filled Steel Tubular Frame Column under Horizontal Low-cyclic Loading

介绍了矩形钢管混凝土柱的三维非线性有限元分析方法,建立了钢管混凝土框架柱的三维非线性有限元模型,利用此模型对在低周反复荷载作用下不同轴压比的钢管混凝土框架柱进行有限元分析,通过与在低周反复荷载作用下的钢管混凝土框架柱的实测滞回曲线、骨架曲线及位移延性进行对比,表明该模型的计算结果较为精确,可以应用于钢管混凝土的整体框架结构分析中,为进一步开展钢管混凝土柱的研究提供基础.

An nonlinear finite element （FE） analysis method of rectangular concrete-filled steel tubular frame column is introduced. A 3-D nonlinear finite element analysis model of rectangular concrete-filled steel tubular frame column is proposed. So the model is used in the finite element analyis of rectangular concrete-filled steel tubular frame column with different axial load levels under low-reversed cycite loading. Compared with the experimental hysteretic curve, framework curve and displacement ductility ratios, the computational results are found to be highly accurate. The results suggest that the model proposed can be applied to structural analysis of rectangular concrete-filled steel tubular frames. Thus it provides a favorable foundation for further study.