Analysis of Transverse Crack on Top Slab of Prestressed Concrete Box Girder

Abstract

According to the construction characteristics and the specialties of stress distribution in the top slab of a prestressed concrete box girder bridge, two improvements on the submodel method have been made on the basis of the conformation of the internal force. The influence of the construction method is considered by the entire bridge analysts, and the influence of the transverse factors on the transverse normal stress is considered on the basis of the submodel. The transverse normal stress distribution patterns of a bridge deck structure under the conditions of different locations in the transverse direction of the bridge and different parameters of carriage axles and prestress losses are analyzed. The main reason that induced longitudinal cracks in the prestressed concrete box girder is studied from the viewpoint of transverse stresses of the bridge deck. Further, a method considering the local mechanical state of a prestressed concrete box girder bridge deck is summarized and can be used as a reference for design and maintenance management.