中文摘要：

为研究GB50010-2002《混凝土结构设计规范》（以下简称＂我国规范＂）剪扭构件的安全度水准及有关设计方法的合理性,对比分析了我国规范和ACI 318-08（以下简称＂美国规范＂）剪扭构件的承载力计算方法和结果,并进行了可靠度比较。结果表明,我国规范在考虑混凝土部分相关性时,用＂三折线＂简化模型将混凝土部分提供的抗扭和抗剪承载力相关曲线外扩,使得混凝土部分的计算承载力被高估,设计安全度偏小。美国规范对于混凝土部分剪扭相关性考虑得较为保守,使得混凝土部分设计偏于安全。美国规范配筋量比我国规范大,配筋基本满足1/4圆弧相关性模型的承载力要求;而我国规范计算所得的钢筋不能满足1/4圆弧相关性模型的承载力要求,设计安全度比美国规范小。美国规范的可靠指标比我国规范高,我国规范可靠指标不能满足GB 50068-2001《建筑结构可靠度设计统一标准》的要求。

英文摘要：

Shear-torsion strength calculation methods and results of RC members using Chinese code（GB 50010-2002） are compared with those using American Code（ACI 318-08） in this paper.The reliability levels of the two codes are also analyzed.It is shown that the Trilinear Model used for shear-torsion behavior modeling in Chinese code expands the shear-torsion envelop,leading to an overestimation of concrete capacity and safety margin.While American Code provides a more conservative model and requires larger amount of steel reinforcement,hence is more conservative.Moreover,American Code can satisfy the strength demand of 1/4 Circular Arc Model test but Chinese code cannot.The reliability level of the Chinese Code can not meet the requirements of Unified Standard for Reliability Design of Building Structures（GB 50068-2001）.