Structural behavior of reinforced concrete bridges with box girder under the influence of vehicle load

In this study, in SAP2000 program, reinforced concrete bridge with box girder was modeled by finite element method and its structural behavior under the influence of vehicle load was examined. Two different analyses were conducted to see the impact of vehicle load on the bridge structure. By analyzing the moving load, the minimum and maximum effects that can occur in the bridge structure were observed in the impact of vehicle load. The bridge model consists of four spans and three legs. For this type of analysis, the bridge table is modeled as three-eye box girder and one-eye box girder. Moving load analysis was performed in 16 different aperture cases according to the two models. These analyses were carried out for three different types of trucks specified in the specifications. As a result of the analysis, the deformation, shear force and bending moment values of the bridge structure were compared. During the analysis period, the effects of vehicle load and bridge structure were observed by analyzing in the time definition area. The bridge model has three eyes, box girder and three spans. The H30-S24 truck defined in the specifications was passed over the bridge at five different speeds, five different numbers and 5 different tracking distances. As a result of the analysis, the deformation, shear force and bending moment values of the bridge structure were compared.