（1 西安交通大学航空航天学院710049； 2 西安建筑科技大学710055； 3 青岛理工大学  266033）
【提要】  对复合受力构件在扭矩作用下的非线性性能，包括扭矩扭转角关系、开裂扭矩、初始刚度、破坏特征、延性和承载能力进行深入探讨，为推导箱形截面钢筋混凝土构件复合受扭下的强度和刚度计算公式以及《钢筋混凝土结构设计规范》（GBJ10—2002）制定有关设计条文提供依据。不仅对钢筋混凝土受扭构件的空间变角桁架理论假设进行了验证，而且以试验数据为指导，讨论了此类构件在工程实际中的应用推广。
【关键词】  钢筋混凝土  箱形截面构件  复合受扭  受扭性能
Torsional Behavior Study of Reinforced Concrete Boxingsection Members Subjected to Biaxial Eccentric Compression，Shear and Reversed Torque/Liu Jiming1，Shi Qingxuan2，Li Zhijun2，Liang Lin3，Yu Maohong1（1 Xi’an Jiaotong University，Xian 710049，China；2 Xian University of Architecture and Techology，Xian 710055，China；3 Qingdao Technological University，Qingdao 266033，China）
Abstract:The nonlinear behaviors of the RC boxingsection columns under combined torque are discussed，including hysteretic curve，cracking torque，initial stiffness，failure type，ductility and carrying capacity.The research results are helpful to deduce the strength and stiffness formula of the test members and to establish design clause for the RC design code.It verifies the assumption of space changing angle truss theory and discusses the application in engineering based on the test results.
Keywords:RC boxingsection member； combined torque； torsional behavior