基于裂缝宽度的钢筋混凝土结构耐久性研究

Durability Research of Reinforced Concrete Structure Based on Crack Width

裂缝宽度是决定混凝土结构耐久性状态的一个重要指标,在对比国内外混凝土结构裂缝控制规定的基础上,分析了各规范中混凝土结构耐久性的裂缝宽度限值,探讨了裂缝宽度对钢筋混凝土结构钢筋锈蚀、碳化、渗透性能和强度的影响,提出了基于裂缝宽度的钢筋混凝土结构耐久性评估方法。

Crack width is an important indicator to evaluate durability of concrete structure. The paper presents crack width limited value of durability of concrete structure on the basis of the comparative study on provisions of crack control in Chinese and foreign codes. The influence of crack width of reinfoced concrete structure on corrosion of rebar, cabonization, permeability and strength is discussed, and then the assessment method on durability of concrete structure is put forward based on crack width.