钢管混凝土在压弯扭受力状态下的有限元模型  

Finite element model of concrete filled steel tube subjected to compression-bending-torsion combined load

作　　者：王宇航[1,2] 聂建国[1] 樊健生[1] 

机构地区：[1]清华大学土木工程系,北京100084 [2]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《哈尔滨工业大学学报》2013年第8期94-98,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金项目(51078206);"十二五"科技支撑计划(2011BAJ09B01)

摘　　要：为了研究钢管混凝土柱在压-弯-扭复合受力状态下的力学性能,在大型通用有限元程序ABAQUS基础上,选取合理的材料本构方程,包括混凝土塑性损伤模型和钢材理想弹塑性模型,并施加位移约束条件和定义钢管混凝土柱的压-弯-扭复杂受力加载模式,从而建立钢管混凝土柱的"壳-实体"精细有限元模型.有限元模型计算结果与文献试验结果吻合良好,并且能够获得钢管混凝土中钢管和混凝土材料每一点的应力和应变状态,也能获得宏观扭矩-扭转角滞回曲线,研究结果充分表明钢管混凝土的"壳-实体"精细有限元模型在兼顾计算精度的同时能够获得较为全面的分析计算结果.To study the mechanical behavior of concrete filled steel tube columns subjected to compression-bending-torsion combined load,based on the general finite element program ABAQUS,the suitable material constitutive equations including concrete damage plastic model and steel perfect elastic-plastic model,boundary conditions and combined load conditions were chosen and applied,then the ＂shell-solid＂ refined model of concrete filled steel tube columns was established.A good agreement could be observed between the predicted results and test results,and both the stress-strain state of the steel and concrete and the global torsion moment versus rotation angle relations could be obtained,showing that the ＂shell-solid＂ refined model had high precisions,and the comprehensive results of concrete filled steel tubes subjected to torsion could be obtained.

关 键 词：钢管混凝土 扭转 非线性 精细有限元模型 

分 类 号：TU398.9[建筑科学—结构工程]