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由于均匀伸长率δgt能够更好地反映混凝土构件中钢筋的工作状态 ,国际上已经开始采用δgt来评价钢筋延性的好坏 ,但我国尚未对应用于混凝土构件中钢筋的均匀延伸率作出具体规定 .基于混凝土受弯构件的平截面假定和《混凝土结构设计规范》GBJ 1 0 -89,通过理论分析 ,给出混凝土受弯构件用钢筋的均匀伸长率最小限值 ,钢筋的延性只要满足该值的要求 ,构件就不会发生钢筋拉断的破坏形式 .计算结果对规范建筑用钢筋的性能具有一定的参考价值
As the uniform elongation δgt can better reflect the working condition of steel bars in concrete members, δgt has been used to evaluate the ductility of steel bars in China, but the specific elongation of steel bars in concrete members has not been specified Based on the assumption of flat section of concrete flexural members and GBJ10 -89 of “Code for Design of Concrete Structures”, the minimum limit of uniform elongation of reinforced concrete flexural members is given through theoretical analysis. Value of the requirements, the components will not happen broken steel tensile damage form.The results of the calculation of the performance of reinforced concrete with a certain reference value