圆钢管混凝土柱的受扭性能研究  

STUDY ON THE TORSION BEHAVIOR OF CONCRETE FILLED STEEL TUBE COLUMN WITH CIRCULAR SECTION

作　　者：王宇航[1,2] 聂建国[1,3] 樊健生[1,3] 

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,北京100081 [3]土木工程安全与耐久教育部重点实验室,北京100084

出　　处：《工程力学》2014年第3期222-227,共6页Engineering Mechanics

基　　金：国家自然科学基金项目(51078206);"十二五"科技支撑计划项目(Grant No.2011BAJ09B01)

摘　　要：对四个圆形截面钢管混凝土柱在纯扭和压扭荷载作用下的滞回性能进行了试验研究,将试验所测得的扭矩-扭转角滞回曲线与采用分层筒模型计算的理论结果进行了对比,结果表明分层筒模型在分析圆钢管混凝土柱在纯扭和压扭往复荷载作用下的受力性能时具有较高的精度。基于分层筒模型,对钢管混凝土柱在纯扭和压扭荷载作用下的轴力和扭矩分配,应变变化规律和主要影响参数进行了较为详细的分析和讨论。最后采用回归方法,基于大量理论计算结果提出了钢管混凝土柱的抗扭承载力和轴力-抗扭承载力相关关系简化计算公式,可适用于实际工程设计。Tests on concrete filled steel tube column under pure torsion and compression-torsion cyclic load were carried out. The hysteretic curves from the tests were compared with the predicted results calculated by the laminated tubes model, and good agreement was found. Based on the laminated tubes model, the torsion mechanism of concrete filled steel tube columns was analyzed and discussed, including the internal force distribution, strain change regulation and main influencing factors. According to the results from laminated tubes model, a simplified formula suitable for practical design were proposed by the regression method for calculating the torsion capacity and axial load-torsion capacity interaction relations.

关 键 词：钢管混凝土 圆形截面 拟静力试验 分层筒模型 扭转 

分 类 号：TU398.9[建筑科学—结构工程]