Damage Simulation For Large-Span Continuous Rigid Frame Bridge And Analysis For It’s Long-Term Performance After Reinforced

In recent years, bridge accidents occurred frequently, the inspection and reinforcement of existing bridge has become the hot issue of growing concern. The paper described various methods commonly used in concrete bridge inspection evaluation and strengthening. Based on the main channel bridge of Guangdong Dongpu bridge, this paper focuses on the universal damage and the associated causes in the case of large-span prestressed concrete continuous rigid bridge. And then this paper proposes the approaches to structural injury simulation and reinforcement design. It also provides new basis for the treatment of injured rigid bridge. The main contents of the research are as follows:1. Make an overview of existing bridge situation at home and abroad, and then introduce various methods commonly used in concrete bridge inspection evaluation and strengthening.2. On the basis of the main channel bridge of Guangdong Dongpu bridge, common disease of large-span prestressed concrete continuous rigid bridge is analysised from the aspects of design, construction and operation stage, ect.3. Performe sensitivity analysis on the causes of bridge injury, and based on this, pick out the key factors, and then combined with the actual disease, put forward some reasonable conditions used for trial calculation, and ultimately determine the situation of bridge damage by analyzing the corresponding relation between the results and bridge disease.4. After confirming the situation of bridge damage, the strengthing design of bridge can be conducted by envelope method, then a model for the whole process include building, damaged, strengthing can be established, and checking the results according to the norms.5. Reinforcement effects can be evaluated by load test, and then the long-term performance of reinforced bridge is analysised in the end.