T、L形钢管混凝土柱的本构模型及非线性分析研究

以现有T、L形钢管混凝土柱试验研究为基础，本文进行了如下工作：（1）针对T、L形钢管混凝土柱的受压约束承载机理，建立了内填混凝土的等效单轴滞回本构模型；（2）建立了悬臂柱在反复荷载作用下的滞回全过程分析模型，编制了T、L形钢管混凝土柱的滞回全过程分析程序；（3）对所完成的试件进行了滞回全过程数值分析，分析与试验结果在荷载-位移和荷载-应变两种层次上进行了对比，验证了本文模型和分析程序的正确性，表明该程序能从构件、材料两种层次上表现出钢管混凝土柱的非线性发展过程。之后，对T、L形钢管混凝土柱中有代表性混凝土和钢单元应力-应变发展全过程进行了数值模拟。结果表明本文模型能用于T、L形钢管混凝土结构的非线性分析。

Modelling and Experimental Verification on Concrete-Filled Steel Tubular Columns with T or L Section

Concrete filled steel tubular columns with T or L section were analyzed in this paper.Considering the confining mechanism,the stress-strain constitutive model for the concrete filled in steel tubes was proposed,with which the analytical results on the hysterestic behavior of the conrete-filled steel tubular columns were obtained and compared with experimental records.The simulation analysis was programmed in Fortran.The analytical model proposed in this paper can be applied in the program of time history analysis for tall buildings using concrete-filled steel tubular columns with T or L section.