Analysis Of Accident Bridge Disaster And Bridge Strengthening Research

Road connecting the bridge structure as an important facility in its construction and operation of the process, because the variable load and a variety of accidental role and impact loads, leading to different structural damage, defects, diseases. These different degrees of damage, defect, disease has seriously affected its performance, or even result in reduced carrying capacity of the structure. Urban bridge building is a modern city an important part of the traffic, it is damaged in some occasional disaster, if not promptly and effectively to reinforce and repair will be a serious impact on urban traffic.The paper on the bridge disaster all kinds of accidents were summarized and analyzed, from the basic causes of the accident, the stage of the accident, the accident severity classification and other aspects with examples of typical bridge accident analysis is to improve post-disaster important way to bridge reinforcement technology. Accident hazards, the importance of timely, science for damage identification of the damaged components and reasonable conduct damage assessment in order to reinforce the bridge to provide reliable data to support maintenance; and to develop rational reinforcement scheme, the effective restoration of structure and use of the carrying capacity performance, to achieve the safe operation of bridges, road Netcom Chang purposes.In this paper, fire, mountain flying rocks, ship collision and other special post-disaster situation, starting from the bridge by force, research and analysis procedures for bridge inspection and assessment of the content. Stressed the need for site investigations, the introduction of the importance of fire cause analysis for different environments, different causes of the fire situation and classified, and for different bridge types and fire damaged and severity in different parts of the reinforcement to determine feasible program, to the fire of concrete and steel corrosion cracking components such as post-disaster disease, from the guarantee structure of the starting load capacity and durability Reinforced with examples of verification in order to get to be a practical bridge strengthening program after fire;At the same time falling stone mountain made, the ship hit the bridge of two different post-disaster stress component in the crack width is not the same time the strengthening methods, calculated before and after reinforcement with examples to verify the feasibility of strengthening methods; Finally integrated approach combining three types of disaster bridge reinforcement and suggestions for strengthening standards to provide a reference for the engineering practice.