Multiobjective Management of Erection for Cablestayed Bridge Using Satisficing Trade-Off Method

Abstract

In the erection phases of cable stayed bridges, the distance between the anchorage points of each cable is adjusted (called a shim adjustment) to agree the cable tension and the fracture configuration (camber) of bridges with the design values in their erection phases.

The points to be taken into consideration with respect to the erection accuracy control are residual errors in cable tensions, residual errors in cambers in the field of accuracy, amount of shim adjustment and number of cables to be adjusted in the field of workability.

These amounts and numbers are required to be minimized simultaneously. It is very important to obtain a well balanced solution of this multiobjective programming problem, but it is not easy in general. This paper shows that the problem can be solved effectively by the satisficing trade-off method.