Flexural Behaviour of Longitudinal Girders of RC T-Beam Deck Slab Bridge

Tee beam deck slab bridges are the principal type among the cast-insitu concrete bridges, and consist of main girders, cross girders which imparts lateral rigidity to the deck slab and deck slab which runs between T-beams continuously. There are many methods have been used for the analysis of Tee beam bridge they are classical methods such as Courbon’s method, Guyon-Massonet method, Hendry-Jaegar method and Finite element method, a powerful tool of the structural analysis which gives a numerical solutions for the complex problems and in which modeling is done by a set of suitable finite elements which are interconnects at the point referred as nodes. The live load bending moment in a girder can be calculated by knowing the live load distribution among them. In this study the analysis of a single span two lane T-beam bridge is carried out by varying the span of 8m, 12m, 16m, 20m, 24m, 28m and number of longitudinal girders using software SAP 2000. In order to obtain maximum bending moment and shear force, the bridge models are subjected to the IRC class AA Tracked and IRC 70R loading system and concluded that with the increase in the span shear force, bending moment and deflection in the girder increases and also the models subjected to the IRC Class AA Tracked vehicle gives higher values of shear force and bending moment in comparison to those subjected to the IRC Class 70 R loading.