The Research Of Cable Replacement Technology In The Twin Towers And Double Cable Plane Concrete Cable-stayed Bridge

In the past for more than half a century, cable-stayed bridge developed vigorously, but for both concrete cable-stayed bridge, from the use of the current situation, most use good condition, but there are also a lot of cable-stayed bridge because of the design and construction of the lacking, the material performance degradation, overload operation and natural disasters and other factors work together, if the in a relatively short period of use of various structural damage occurs,including disease problem of stay-cables, particularly prominent and has a significant threat to the safety of the cable-stayed bridge use.Large bridge is a national economy, the investment huge and is of great significance, and if you can’t find the function of the bridge in the safe hidden trouble even implied degradation will lead to significant safety accidents. Therefore,when found cable-stayed Bridges of problems, to replace the bridge stayed cables are an effective treatment methods.The thesis summed up the analysis of the main causes of the cable-stayed bridge cable replacement, and based on this, to the lees Tuo Yangtze river bridgeas the background, puts forward the bridge cable replacement target and two cable replacement plan, through the finite element calculation comparison and analysis on the process of discharging cable replacement cable, zhang pulled to stayworking, girders deflection cable force, stress and the influence of the deviationof top, determined the tower is symmetrical, two tower of the succession of theupstream and downstream cable replacement project, and discussed the use of installed bridge health monitoring system to monitor the exchange process of feasibility.