中国与欧洲混凝土结构规范耐久性设计异同

Designing code comparison of the concrete structure durability between China and Europe

我国与欧洲具有相似的气候环境,混凝土结构规范耐久性设计条款基本类似,但规定的限值不尽相同。首先对两部规范中一般大气环境下混凝土结构耐久性设计规定的异同进行了比较,重点对两部规范中混凝土保护层厚度、强度等级和环境对碳化寿命的影响进行了分析并与实测数据对比。结果表明:我国规范对中、高湿度的室内构件混凝土强度和保护层厚度的规定偏低。

The durability items of the concrete structure design codes in China and Europe are basically same due to the similar atmospheric environment,but the specified limits in two codes terms are different.In this paper,similarities and differences between Chinese and European codes were compared in the durability specification.The specification of the minimum concrete cover,strength class and environment from Chinese and European codes were analyzed by applying the carbonation life prediction model,the predicted carbonation depth is compared with the in-situ testing data.The results showed that,for concrete inside buildings with moderate or high air humidity,the specified limits for concrete strength class and the concrete cover depth in Chinese code are lower than European code.