RESPONSE OF BOX GIRDER BRIDGE SPANS Influence Based Moving Load Analysis

Recent developments in the field of Bridge engineering, Box Girder Bridges have heightened the need for improving the ability to carry the live load and undertaken as a result of code provisions. This paper deals with the response of Reinforced concrete and Prestressed concrete bridges when subjected to standard moving vehicular loads. Currently length of the span and width of the carriage way are kept constant for the models and analysis is carried out using MIDAS CIVIL software. Influence based moving load analysis: Influence lines and Influence surfaces are generated to analyze the response of bridge structure subjected to live loading within designated lanes. BM, SF and Displacements are obtained by placing moving tracer at different positions of the designed lanes throughout the span length. This study makes an attempt to develop efficient geometric models for new constructions, and to provide necessary structural configuration against live load bending moments, shear force and displacements. The determination of absolute maximum live shear and bending moment due to moving concentrated loads on the box girders is discussed.