中文摘要：

为研究型钢混凝土复合受扭构件的抗扭刚度,以轴压比、混凝土强度和配箍率为研究参数,设计了4个试件进行复合受扭试验。通过试验得到试件加载全过程的T-Q曲线、开裂扭矩和极限扭矩等重要数据,并且分析了各个参数对型钢混凝土抗扭刚度的影响。结果表明：型钢混凝土构件复合受扭时,适当地增大轴压比、配箍率及混凝土强度能显著提高型钢混凝土构件的抗扭强度。通过对试验数据进行分析,提出型钢混凝土复合受扭构件的抗扭刚度公式,与试验数据吻合较好。

英文摘要：

In order to study the torsional stiffness of the steel reinforced concrete subjected to the combined force, four specimens were designed by taking axial compression ratio, concrete strength and stirrup rate as the study parameters. Based on the experiment, the whole process of T-Q curve, cracking torque and limit torque were acquired, and the impact of each parameter on the torsional stiffness of the steel reinforced concrete was analyzed. The results show that when the SRC members is subjected to the combined force, an appropriate increase in axial compression ratio, stirrup ratio and concrete strength can significantly improve the torsional strength of steel reinforced concrete elements. Based on test data analysis, the formula for the torsional stiffness of SRC member subjected to the combined force has been given, and the results are in good agreement with the experimental data.