Mechanical Properties Study Of Cable Tower Anchorage Zone On Yangtze River Guanyinyan Cable-stayed Bridge

Among the long span bridges, the cable stayed bridge has being one of the quickest developing,the most competitive bridge styles of modern bridge project by its large spanning ability, the fashionable and attractive structure. The cable anchored area on cable tower is the key part of cable stay bridge. Because the facts of the strong concentrated force, the anchorage force of prestressed stirrup,and the slacking down of holes to structure and so on, the strained condition of this part enormous complexity. Therefore, the study of load-carrying capability analysis of cable anchored area on cable tower in cable stayed bridge has received the attention from the whole bridges people, and the cable anchored area on cable tower is the difficulty and key point when design and construct a cable stayed bridge.Guanyinyan Yangtze River Bridge ,which in Jiangjin,Chongqing, the cable tower of it had used diamond cable tower and fan-shaped arrangement, each cable can tear more than 800 tons; the breadth of bridge floor is 36.20m, to be the widest among the similar bridge, that caused the cable tower force to be more complex; all the constrution was found with domestic steel, made design and construction a tough test. it is necessary to further calculate and confirm the security and reliability of the structure, analysis the force law of the cable tower structure, which has a big reference value for further design and construction of cable anchored area on cable stayed bridge with big force ,breadth bridge floor of same type.This essay analysed the cable tower's force situation under different construction condition by computer simulations analysis of segmental force of cable tower's anchored area on Yangtze River Guanyinyan cable stayed bridge, and made the simulation analysis to the actual bridge structure and the model separately to handing the force situation of anchored area; through this model experiment, had tested the loss and coefficient of wear of prestress, and tested the structure's force range under different load operating mode, obtained parts of its law and force data under the practical structure load fuction. Through the comparison of theotretical analysis and experimental data, make clear about the actual force and distortion situation of main tower struture, discovered the weak spot where need carefully and proposed means to strengthen it, that has examed the security of design. On this foundation, it proposed reasonable suggestion about optimum design of main tower's structure,which provide guidelines and examples for further design and construction of same type.