ABSTRACT
To study the comparison and selection method of the temporary hoisting system for suspenders replacement of long-span arch bridges, a half though arch bridge and a tied-arch bridge were selected. Two replacement schemes, the arch rib hoisting scheme and the deck hoisting scheme, were designed for each bridge. Based on the suspender replacement works that have been completed, the same replacement process, which with twenty-one construction steps, was adopted in each replacement scheme. The finite element model of each replacement scheme was built, and the deck displacement, arch rib bending moment, and adjacent suspender cable forces were compared. It is found that the most unfavourable effects caused by different hoisting methods are different under the same bridge type, while the structural response of different bridge types under the same hoisting method is also different. According to the results, the application scope and scheme comparison parameters of the arch rib hoisting method and deck hoisting method are recommended, which provides a reference for the suspender replacement of the long-span arch bridge.
