异形钢管混凝土柱的延性

THE DUCTILITY OF CONCRETE-FILLED ABNORMITY STEEL TUBE

为反映异形钢管混凝土截面延性的好坏,采用非线性全过程的分析方法计算异形钢管混凝土柱的截面曲率延性系数,分析影响截面曲率延性的各因素。通过分析可得,在影响延性的众多因素中,轴压比对延性的影响最大,它不但影响延性的性能,而且影响着最差延性出现的位置。在三种异形柱截面延性中,十字形柱截面的延性最好,T形柱截面次之,L形柱截面延性最差。

In order to judge whether the sectional ductility of concrete-filled abnormity steel tube is good or not,based on the method of nonlinear analysis of complete response process,the curvature ductility coefficient for concrete-filled abnormity steel tube is calculated.All kinds of factors influencing curvature ductility coefficient are analyzed,it can be found out through the analysis that axle-pressure ratio not only affects ductility capability but also affects location of the least curvature ductility.'Crissed'shaped columns is best and 'T'shaped columns is worst in the sectional ductility of the three special-shaped columns.