[提要]  将配筋钢纤维混凝土纯扭构件荷载一变形全曲线分成开裂前和开裂后两阶段，开裂前按弹性工作状态计算；开裂后采用空间软化桁架模型分析。比较表明，理论计算与试验结果符合较好。
[关键词]  钢筋混凝土 钢纤维 纯扭 空间桁架模型 软化 变形  内力

The load-defomation complete curve of reinforced steel fibrous concrete pure torsional member is divided into "two stages", the stage before cracking and the stage after cracking. The elastic theory is applied to analyse the stage before cracking, and the space softerung truss model is applied to analyse another. Comparision shows a good agreements between the theoretical calculation and the test results.
Keywords: reinforced concrete; steel fiber; pure torsion; space struss model; softening; deformation; internal force