Research On Design Method Of Reinforcing Steel Truss Stiffening Girder Suspension Bridge In Mountain Area

In recent years,In order to crossing the mountain valley and promoting the development of mountainous highway construction,there are a number of steel truss suspension bridge built. Due to the increasing volume of traffic and the erosion of the external environment,the suspension bridge built in early years has begun to emerge various diseases,and effect the normal use of traffic,so the old bridge reinforcement has come into being;the reinforcement and transformation of suspension bridge is a complex systems engineering,as compared to other bridges, suspension-bridge service life is shorter,its maintenance and reinforcement has not entered a major outbreak period yet,With the growth of useful life,this kind of bridge will face partial reinforcement even whole overhaul. Based on the above background, this paper makes the following studies:① Researching the basic characteristics of steel truss suspension bridge in mountain,suspension bridge common diseases and reinforcement and design concepts,the recent development status of reinforcement tools and reinforcement technology commonly used at home and abroad,analysis the existed disadvantage of reinforcement theory technology and a further study on the new reinforcement technology;② Making a Summary of disease characterized about mountainous steel truss suspension bridge;Combined with engineering examples,mainly make a detailed analysis from the main cable,sling,stiffening beams and other components,and make a further study on the mechanism of the disease,design,and provide a foundation for designing of reinforcement and the conservation and management in future;③ The research on mountain steel truss girder suspension disease;In connection with the particularity cable structure,anglicizing and studying on its common diseases, taking the use of parametric analysis,focusing on how diseases affect the structure force in various structures about suspension system;④ The research on mountain steel truss girder suspension reinforcement and design comparative study,combined with the disease characteristics of mountain steel truss suspension bridge and the affect analysis suspension of the composition structure of each component to the overall force,there are the two kinds of reinforcement and design measures,after a Transverse comparative analysis on reinforcing effects, finding a reasonable and suitable reinforcement scheme;...