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.