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In this paper comparison of shear force and bending moment of T beam deck slab having longitudinal girder and cross girder is done using courbon's method (manual analysis) and grillage model (using staad pro). Construction stage wise grillage model is prepared in staad pro. Bridge having carriage widths of 7.5 m have two types of live load as per IRC 6 i.e. Class 70R (W) and Class A-2 lanes. Static check of grillage model is compared with manual calculation having 0% difference. For dead load, shear force and bending moment of girder difference using manual calculation and grillage model comes out to be 0.64% and 2%. In manual calculation the reaction factor of an individual girder is calculated using courbon's method and multiplied with maximum bending moment. In live load calculation, for Class 70R (W), difference in bending moment for girder A, girder B and girder C comes out to be 26.45%, 4.78% and 28.66% but total moment difference is 0.05% while for Class A-2 lanes), difference in bending moment for girder A, girder B and girder C comes out to be 21.57%, 9.92% and 16.53% but total moment difference is 0.7%. So, from the result it can be seen that the total design moment of the girder comes out to be nearer using both the method while the girder wise difference in bending moment is found to be higher for outer girder and lower for inner girder. [ABSTRACT FROM AUTHOR]

Bridge construction design on this design used a prestressed PCI concrete I-Girder. The span of bridge was 40 m which is consist of 3 spans with total length for 120 m. The calculation of the analysis for the structure depends on the structural type. For this design, the bridge was assumed to be indeterminate static which the bridge reactions are more than 3. The internal forces of I-Girder consist of shear forces and bending moment which can be get by simulate the bridges loading that related to the bridge structure. The software for designing the bridge structures and obtained the internal forces value are using SAP 2000 software and manual calculation method. The internal forces data was obtained by calculating the girder structure using manual calculation and analyze using SAP2000 software and be compared by the values. The internal forces is taken at 20 m, 30 m, and 40 m span of girder to be compared the difference value of manual calculation and software analysis using regression line. [ABSTRACT FROM AUTHOR]