圆中空夹层钢管混凝土压扭构件工作机理研究  

Mechanism of concrete-filled double-skin steel tubular column subjected to compression torsion

作　　者：黄宏[1] 范志杰[1] 陈梦成[1] 

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013

出　　处：《广西大学学报（自然科学版）》2013年第1期42-47,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51008122;50968006);江西省教育厅资助项目(GJJ10709);华东交通大学研究生创新基金(YC2011-X003)

摘　　要：为了对圆中空夹层钢管混凝土构件在压、扭复合受力下的工作机理进行研究,采用大型通用有限元软件ABAQUS对圆实心钢管混凝土压、扭复合受力构件进行建模计算,现有的试验验证了计算结果与计算方法的正确性。再采用同样的方法对圆中空夹层钢管混凝土构件在压、扭复合受力状态下进行了模拟计算。通过计算发现,扭矩—转角全过程关系曲线分为弹性、弹塑性、塑性强化三阶段。通过对三个阶段扭矩—转角全过程关系曲线、内外钢管和混凝土的应力分布云图、三者间相互作用力以及轴压比影响的分析,结果表明,在加载过程中,当轴压比较小时,随着轴压比的增大,极限扭矩增加;当轴压比较大时,随着轴压比增大,极限扭矩降低。The working mechanism of concrete-filled double-skin steel tubular （CFDST） column un- der compression torsion is investigated. The compression torsion behavior of the concrete filled steel tube column was analyzed by the finite element software, and the calculated results were verified by the experimental results. The torque-angle relationship of the CFDST column subjected to compres- sion torsion was calculated. The results indicate that the torque-angle curve can be divided into elas- tic, plastic and plastic hardening stages. Through the analyses of the three stages of torque-angle curve, the stress distribution of steel tubes and concrete, the interaction between the steel tubes and concrete, and the effects of axial compression ratio, it was show that when the axial compression ra- tio is low, the ultimate torque is increased with the axial compression ratio, and when the axial com- pression ratio is large, the ultimate torque is decreased with the axial compression ratio.

关 键 词：圆中空夹层钢管混凝土 压扭 有限元 工作机理 

分 类 号：TU312[建筑科学—结构工程]