ABSTRACT
This paper presents a method for the durability assessment and re-design of concrete structures in sea-linking projects, such as the Hong Kong-Zhuhai-Macau Bridge (HZMB) project. In order to assess the durability condition of the reinforced concrete structures associated with the chloride-induced corrosion of steel in concrete, data sets obtained from construction, managing, monitoring and exposure sites are used to build a durability assessment model to predict when the depassivation of steel will happen, when necessary repair methods need to be taken and to put forward an assessment method of the durability of the structures with a failure probability. With different levels of failure probability obtained, different methods of strengthening and renovation can be adopted to improve the durability of the concrete structures and make sure the target service life can be achieved.
