扭矩作用下型钢混凝土构件的力学性能试验研究  

Experimental study on mechanical properties of steel reinforced concrete members under torsion

作　　者：杭子彦 邵永健[1] 施怀博 HANG Ziyan;SHAO Yongjian;SHI Huaibo(School of Civil Engineering,SUST,Suzhou 215011,China;School of Civil Engineering,XuzhouUniversity of Technology,Xuzhou 221009,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011 [2]徐州工程学院土木工程学院,江苏徐州221009

出　　处：《苏州科技大学学报（工程技术版）》2021年第2期7-13,共7页Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）

基　　金：2019年江苏省研究生实践创新计划项目(SJCX19_0838);江苏省研究生工作站(2010_060)。

摘　　要：为研究扭矩作用下型钢混凝土构件的力学性能,以配钢形式、轴压比和扭弯比为变化参数,设计了9个型钢混凝土试件和1个钢筋混凝土对比试件,进行了试验研究。结果表明,扭矩-扭率全过程曲线可分为加载至开裂的线弹性阶段、开裂后至极限扭矩的弹塑性阶段和极限扭矩以后的破坏阶段;10个试件均为扭型破坏;对于受扭承载力和扭转变形能力,型钢混凝土试件显著优于钢筋混凝土试件,双轴对称配钢试件优于单轴对称配钢试件;轴压比从0.1增加到0.2,试件受扭承载力平均增长11.9%,延性系数平均降低10.6%;扭弯比从1∶2增加到1∶1,试件受扭承载力平均增加2.3%,延性系数平均提高22.4%。研究结果可给SRC复合受扭柱的工程设计提供技术支撑。In order to study the mechanical properties of steel reinforced(SRC)concrete members under torsion,nine reinforced concrete members and one reinforced concrete member for comparison were designed with steel form,axial compression ratio and torsional bending ratio as variable parameters.The result shows that the whole process curve of torsion ratio can be divided into the linear elastic stage from loading to cracking,the elastic-plastic stage from cracking to ultimate torque and the failure stage after ultimate torque,and the 10 specimens were all torsional failure.For the torsional bearing and torsional deformation capacity,steel reinforced concrete specimens were remarkably better than the reinforced concrete specimen,meanwhile biaxial symmetric steel specimens were better than the uniaxial symmetric steel specimens.When the axial compression ratio increased from 0.1 to 0.2,the coefficient of the torsional bearing capacity increased by 11.9%and the ductility coefficient decreased by 10.6%.When the torsional bending ratio increased from 1:2 to 1:1,the coefficient of torsional bearing capacity increased by 2.3%and the ductility coefficient increased by 22.4%.The research results can provide technical support for the engineering design of SRC composite torsion columns.

关 键 词：型钢混凝土 复合受扭 配钢形式 承载力 延性 

分 类 号：P398.9[天文地球—地球物理学]