Based on Hengyang Yanqi bridge,this thesis investigates the optimum preliminary tensions of the suspenders at reasonable status of completed bridge,and studys how to determine and adjust the preliminary tensions of the suspenders at the construction stage.

Tow methods,flip-chip method and influence matri x method,were proposed to calculate the suspender tension in a spatial tied-arch bridge.

Test analysis of the suspender force of the large span concrete filled steel tube arch bridge;

A new explanation of the rigid continuous girder method for determination of tensile force of rod of tied arch bridge