Durability Design of Concrete Structure of Tongminghai Bridge in South China

The main factors affecting the durability of concrete structures for Tongminghai Bridge in South China were identified and the corrosion grades of typical components were determined through corrosive environment investigation, engineering investigation and exposure test. The effect of load on chloride ion diffusion in concrete was studied through numerical analysis of stress in typical structures, indoor simulation test under interaction of load and environment. Considering the actual engineering load, durability design method of concrete structure was established in accordance with the actual environment and engineering characteristics. The engineering durability design parameters were defined and the additional anti-corrosion measure scheme with optimal life cycle cost was determined.