Study On The Method Of Reinforced Concrete Bridge Safety Evaluation

With the quick development of transportation, Bridges as communications hinge playa more and more important role, have been the tache of local economy development. Especially recently several decades, all kinds of bridges have been built in our country, such as highway bridge, railway bridge, both railway and highway bridge, city crossroad. During the building and operation management of these bridges, lots of evaluation work has been done to insure the construction quality and normal operation. particular, the structure of existing reinforced concrete bridges become obsolescence and cracking because of the outsider physical and chemic factors, which weaken the carrying capacity and stiffness of reinforced concrete structure, and lower it's durability, impact on the normal operation lifetime of structure, eventually, lead to slumping accidents. Therefore, it's necessary to ensure the bridges' normal operation by safety evaluation.Combining the bridges engineering evaluation practice, we research the evaluation technology and the safety evaluation of monitored behavior of bridges in this dissertation. The main contents are as follows.1. The importance of bridge structure safety, the significance and goal of safety evaluation are expatiated, and at the same time, the development and actuality of safety evaluation at home and abroad are introduced.2. The contents, ordinary methods and kinds of safety evaluation, and as well as the several methods of structure condition evaluation are systematacially introduced. The methods of structure disease diagnosis are detailed introduced and their merits and demerits are analyzed by contrast.3. The basic contents of bridge safety evaluation are summarized totally, and the scatheless evaluation methods of concrete strength and reinforcement rustity are analyzed, and the vibration mode, strain mode and dynamic coefficient methods for structure dynamic response,and along with the ordinary methods of structure safety assessment are described in detail.4. According to structure safety evaluation theory, the mostly mission is...