By analyzing the cable replacement sequence survey of some bridges

the major sequence of cable replacement was summarized according to the different arrangement forms of the cable

and the safety cable replacement sequence was obtained from simulating the cable replacement of a cable-stayed bridge with double towers and double cable planes using the finite element model.The sequence of cable replacement of cable-stayed bridge was analyzed according to the variation of bending strain energy when only one cable was replaced.The variation of cable force in different cable replacing conditions were compared

including replacing one cable of single tower

replacing four cables symmetrically on the same side of double towers and replacing four cables antisymmetrically on the different sides of double towers

and the sequence of cable replacement was studied.The alignment control of bridge girder was analyzed under the conditions of replaceing four cables on the same side of double towers and replacing four cables on the different sides of double towers

and established a finite element model.By summarizing and analysis

the cable replacement of cable-stayed bridge should proceed antisymmetrically from the short cable to the long cable.