中文摘要：

在配筋钢纤维高强混凝土薄壁箱形截面纯扭构件试验研究的基础上，应用空间软化桁架理论，结合钢纤维高强混凝土本构关系及其软化系数方程，编制了软化桁架模型分析程序，并对试验构件进行了全过程分析．在考虑钢纤维高强混凝土抗拉强度作用时，能较好地模拟试验构件的荷栽一变形全过程，不仅能较准确地得到极限扭矩，而且可以获得开裂扭矩，其结论也得到相关钢纤维高强混凝土纯扭构件试验结果的证实．

英文摘要：

Based on the experimental study of Steel Fiber High Strength Concrete （SFHSC） pure torsional thin-walled box girder and corresponding nonlinear analysis program in which the space softening truss theory with constitutive laws and softened coefficient equation of SFHSC has been involved, the full process of behavior of the member has been studied. It has been found that both the ultimate torsion capacity and the cracking torsion capacity of the test member can be well simulated if the tensile strength of SFHSC is considered in the model. The conclusions have been confirmed by the experimental results of reinforced steel fiber high-strength concrete pure torsional rectangle section members.