海港混凝土结构耐久性设计国内外对比及工程应用

Comparison of durability design of concrete between domestic and foreign specifications and its application

钢筋混凝土结构耐久性影响结构的安全性和使用性,国内外相关设计规范都对混凝土结构耐久性做出了明确规定。为分析各国规范在混凝土耐久性设计方面的异同,选取中国、英国和美国标准,对环境暴露等级、混凝土材料和构造等耐久性设计内容进行对比分析。结合工程实例给出了按各国规范的耐久性设计内容。分析表明:各国规范都将环境划分为若干类别,根据不同的环境类别采取不同的耐久性设计,主要包括混凝土材料、混凝土保护层厚度、限裂措施等方面。

The durability of reinforced concrete structures affects the safety and usability of the structure and hence design codes at home and abroad have made clear regulations on the durability of concrete structures.In order to analyze the similarities and differences in the concrete durability design of various countries,Chinese standards,British standards and American standards are studied in this paper to compare and analyze durability design content such as environmental exposure levels,concrete materials and structures.Combined with executed projects,the durability design of various standards is given.The analysis shows that the environment is classified into several categories based on various standards,and different durability designs are adopted based on different environmental categories,including concrete materials,concrete protective layer thickness,crack limiting measures,etc.