基于变角空间桁架理论,建立了钢筋混凝土矩形截面受扭构件的非线性分析模型进行全过程模拟,得到扭矩和扭转角变化的全过程曲线,数值分析结果与已有试验结果吻合较好。讨论并分析了截面尺寸、截面高宽比、配箍率和纵筋配筋率对钢筋混凝土构件抗扭承载力影响的规律性及其原因。 Based on the theory of variable space trusses, the nonlinear model of the torsion member with rectangular section of reinforced concrete was established and simulated. The whole curve of torque and torsion angle was obtained. The numerical analysis is in good agreement with the existing experimental results. The regularity of the influence of section size, aspect ratio, stirrup ratio and longitudinal reinforcement ratio on the torsional load-bearing capacity of reinforced concrete members is discussed and analyzed.