基于耗能指标的钢筋延性分类及应用选择

Ductility classification and application selection of steels based on energy dissipation indexes

钢筋拉断前的耗能能力对混凝土构件的延性及破坏形态有很大的影响,而钢筋的耗能指标取决于钢筋的强度及均匀伸长率。本文根据标准规范及试验统计,提出并计算各类钢筋的耗能指标,基于耗能指标对各类钢筋按延性进行分类,给出各类钢筋的强度价格比,从提高结构性能、节约材料的角度出发,讨论各类钢筋的合理使用范围。

The energy dissipation capacity of reinforcing and prestressing steels before tension failure has a great impact on the ductility and failure modes of concrete elements.The energy dissipation indexes of the steels depend on their strength and uniform elongation rate.According to standards,specifications and testing statistics,the energy dissipation indexes of various types of the steels are calculated and proposed.All kinds of the steels are classified based on their energy dissipation indexes,and their strength-price ratios are provided as well.In the view of improving structural performance and saving material,the applicable ranges of different kinds of the steels are discussed.