Analysis On Mechanical Characteristics For Segment Of The Anchorage Zone Segment Of Large Tonnage Cable Force Cable-stayed Bridge Tower

The anchorage zone of the pylon is a key component on the cable-stayed bridgetower, where the local concentrated stress of cable will be delivered to the tower safelyand unformly. Due to the large local concentrated stress of cable, anchoring forces ofprestressed steels, the holes weaken tendons and other factors, the force state in thisregion becomes very complicated. Therefore, the research of mechanicalcharacterization on steel anchor box segments of the anchorage zone of pylon is the areawhich the bridge professionals concerned very much, the design and construction oftower anchorage zone is also difficult and crucial part of the whole cable-stayed bridge.This dissertation is based on the Chongqing Dongshuimen Yangtze River Bridge,mainly focuses on detailed theoretical analysis of steel anchor box segments on theanchorage zone of pylon of this bridge.This paper describes the history of the development status of the cable-stayed athome and abroad, the basis of summing up the various features and practical range ofcable-stayed bridge on; approach focuses on the structure and development ofanchorage zone of cable, summarizes the contexture and force characteristics of steelanchor box structure of tower anchorage area.The shape of Chongqing Dongshuimen Yangtze River Bridge tower is like a shuttle,the bridge is a dilute cable-stayed bridge with twin towers and single cable plane, asingle cable force is large, the steel anchor box segment of the force is ladge as well.Frist, using finite element software Midas Civil to establish the integral space finiteelement model, analyze the various stages of the bridge construction and operationalphases, according to the results drawn from the analysis, to find the most unfavorablestage by all segments of the steel anchor box anchor stress situation. Second, usingfinite element software Midas FEA to establish the most unfavorable stage, analysislocal force characteristics of the tower anchorage zone, clearing the displacementchanges, the distribution and magnitude of principal tensile stress, compressive stress inthis area. Evaluated its safety for bridge construction, for the bridge construction, designprovides optimization scheme. Finally, puts forward some thoughts for further researchto this project.