The model has been simulated, and the resultants of deflection and stresses have been determined, taking into account the effect of different combinations of loading from the Indian Railways. The modelling and the evaluation of the 3D model of the bridge have been done using non-closed form finite element method (FEM) based ANSYS software and loadings have been applied symmetrically and un- symmetrically. This paper offers a modelling process for the study of a box- girder bridge with a ballastless sub-track system using the finite element method and evaluates the different static response characteristics of the bridge when it is loaded according to Indian Railway standards. However, the analysis of such a bridge is too complex and challenging for the designers. The box-girder bridge also has a lower structural weight than any other type of bridge. The box-girder bridge has recently gained a lot of popularity because of its serviceability, stability, and structural efficiency.
