一、问题的严重性钢筋混凝土结构由于钢筋有混凝土保护层的保护,通常认为是相当耐久的。但是近年来出现了混凝土中钢筋锈蚀引起构件损坏,甚至整个结构失效的事例,因而越来越引起了人们的重视。我国华南及华东沿海地区的一些港口码头和水工建筑物的耐久性问题已相当突出。据四航局科研所等单位1981年对华南18座码头的调查结果表明,尽管它们的使用期仅经历 First, the seriousness of the problem Reinforced concrete structures are generally considered to be very durable due to the protection of the reinforced concrete protection layer. However, in recent years there have been cases where the corrosion of steel bars in concrete has caused component damage and even the failure of the entire structure, which has increasingly attracted people’s attention. The durability problems of some port terminals and hydraulic structures in the coastal areas of South China and East China have been prominent. According to the findings of the 1981 survey of 18 docks in South China by the Institute of Science and Technology of the Fourth Netherland Aviation Administration and other units, they have experienced only their lifetime.