Research On Structural Optimization Of Stell Anchor Box In The Tower Of Cable-supported Girder Bridge

With the development and progress of bridge technology, the bridge gradually has thecharacteristics of lightweight and combination. In particular, because of living standardsrising, the modern people put forward the more higher requirements about the appearanceof the city. The cable-stayed bridge is favored by more and more bridge workers for itsbeautiful styling and beautiful structure. The cable auxiliary system of cable-stayed bridgeis based on the beams as the main load-bearing body, and the rope-assisted as theload-bearing body, in addition, using the universal cable to increase the beam intensity.Formerly, the bridge relies on the beam strength of the bridge can not meet the actualrequirements, but now it can meet the design requirements and make full use of thecarrying capacity of the beam and cable. Cable auxiliary bridge’s tower height is lower thangeneral cable-stayed bridge，so that it can match with the environment in the city and meetthe special needs of the environment from the aesthetic, this kind of bridge are generate inthis context.This paper is based on the city’s cable-stayed bridge of Chaoyang City of LiaoningProvince. It takes advantage of ANSYS software, so it can optimize the design of structuralcharacteristics analysis of the steel anchor box in the tower. The bridge is the bridge of thecity, the main beam adopts the single box of four rooms prestressed concrete box girder.Thebeam is high.Therefore, the stiffness is relatively large, so it selects the stress system.Andthe same time,the cable anchoring site of the main tower is an important force structurewhich disperses the lasso local concentrated force to the total cross section and safely,evenly delivered to the anchorage zone and Pylon. Steel anchor box is one of the key partsof the cable-stayed bridge cable auxiliary system. Whether reliable or not, it directly relatesto the safety of the bridge. By investigating the theoretical calculation of the steel anchorbox and combinating the numerical simulation，this paper puts forward a reasonable andfeasible optimization design program, and hope to produce some economic benefits.