Analysis & Redesign of Superstructure of Span Concrete Bridge

Abstract

Bridges are often used to allow people and vehicles to across a natural obstacle such as a river , valleys, roads or pathways. This research concluded a process of analysis andre-design of the superstructure of spanbridge which placedin the Northern KORDOFAN State. A bridge deck was analyzed by the method of Grillage analogy, this method consistency of converting the bridge deck structure into a network of rigidly connected beams or into a network of skeletal . The studywas conductedon the modelby applying the design loads onthe superstructureof the bridgeaccordingto the British standard Code (BS5400), And thenanalyzing theseloads by using manualanalysisand sap2000 computerprogram. Three positions for HB vehicle loading have been studied. The purpose of thestudyis to obtainthe worstcaseload that givesmaximuminternalforceeach of theshear forcesandbending momentsofthe superstructure of bridge and eventually, conclusions and recommendations have been drawn. Further studies are suggested for future researches.