Retrofit Scheme against Crack Growth of ILM Bridge Superstructure in accordance with Each Construction Stage

시공단계별 ILM 교량상부의 균열성장에 대한 보강방안

These should be constructed partially, because many prestressed concrete box girder bridges in situ have large cross section and long span. Therefore, accurate prediction of differences, both elapse time of each construction stage and exposure of atmosphere at each position of cross section, is very important. Though it is importance, engineers are apt to overlook it. This study predicted cracks due to shrinkage and stress concentration phenomenon by each construction stage and then, ascertained reduction of tensile stresses after applying retrofit scheme.