A Study on Effect of Pre-Stressing Sequences in PSC Bridge Strengthening Method Using Continuity with External Prestressing

PSC교량 보강시 긴장력 도입순서의 영향에 관한 연구

Numerous PSC bridges are stregthened by the combined use of continuity of simple spans and addition of external prestressing. In this case prestressing sequences should be carefully checked due to the effect on the stress and camber of girders and slab. Various prestressing sequences were applied in this field test and measured values were analysed. This results show that preatressing sequences affact the stress and deflection of bridge members, so the prestressing sequence should be considered at the desist and construction stages of deteriorated bridges.