Abstract: In this paper, an expression of the coefficient of reducing cracking resistance in reinforced concrete torsional members under pulling force and a formula for calculating the ctacking resistance are derived, based on the theory of Hsu's inclined bending and concrete characteristics under biaxial strength. According to the theory of space truss with variable angle, the effect of pulling force on torsional ultimate strength of members is analyzed. A formula for calculating ultimate strength of reinforced concrete tortional members is presented. Fourteen reinforced concrete members were tested, and the test results are agreeable with those of the theoretical calculations.

摘要： 本文根据Hsu的斜弯曲破坏理论并考虑双轴强度特征的影响,导出了轴向拉力作用下钢筋混凝土受扭构件抗裂度降低系数的表达式及其相应的抗裂度计算公式。按照变角空间桁架理论分析了轴向拉力对构件抗扭极限强度的影响,并提出了钢筋混凝土构件抗扭极限强度计算式。进行了14根构件的试验,理论计算结果与试验结果符合良好。