Durability Assessment And Estimate Of Existing Reinforced Concrete Bridges

Reinforced concrete bridges are widely used in civil engineering. The deficiency of durability appears in lots of existing reinforced concrete bridges. It causes many aging problems and has an ill effect on people's productivity and life. It also brings people loss of money. So more and more scholars and engineering technical staff pay attention to the problem. It has been a research hotspot in the civil engineering at the present time.Based on the durability of reinforced concrete bridges and on the full analysis of research results over the world, the paper makes a more deep-going and systemic study of the durability in four directions of surroundings, material, element and structure. The main contents are as follows:1. Based on the full analysis of research results over the world, the paper analyses the factors. Such as carbonization, chloride, erosion of reinforcing-bar, etc.2. Based on the characteristics of reinforced concrete bridges, the paper analyses mechanism of durability and the influence of durability damage on the performance of reinforced concrete bridges.3. Researched the influence of crack on the durability of reinforced concrete bridges.4. Based on the analytic hierarchy process, it adopts theΛ-type subordinate function to set up the durability index assessment model of the existing reinforced concrete bridge's superstructure on the basis of fuzzy mathematics.