Computer analysis of steel box girder bridges

An efficient and reliable computer program which can be used to design/analyze straight and curved single or multi-span, composite box girder bridges is presented. The program uses the finite difference method to solve the Vlasov differential equations which describe the load deformation response of a curved box girder and will perform an analysis or design a single prismatic or nonprismatic straight or curved box girder under AASHTO criteria. The box section may be a single unit of the bridge or a member of a multiple box system. The box may be either non-composite or composite construction. The section can have internal transverse diaphragms spaced along the box and top lateral bracing. Output contains influence line ordinates, stresses on top and bottom flanges at locations along the span due to (1) dead load; (2) superimposed dead load and (3) live load.