【摘要】 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更多还原

【Abstract】 Even percentage elongation δ gt can reflect the working state of steel bars used in concrete members,which has already used to appraise stand or fall of steel bar’s ductility in international countries.But any specific rules about even percentage elongation of steel bars have not appeared in codes of our country.In this article,least even percentage elongation for steel bars used in bending members are given through the theory’s analysis which bases on horizon section presumption of bending members and Design Code of Concrete Structure GBJ 10-89.If steel bars’ even percentage elongation is met,the bending members do not cause destruction of the bar’s rip,and the result of calculating has great value of reference about standardizing bars used in architecture.更多还原