Proceedings of the 5th International Conference on Civil Engineering for Sustainable Development

Abstract

The live-load distribution factor is the key parameter in the design and construction of Highway Bridges. Numerous studies, as well as AASHTO and AASHTO-LRFD specification on live-load distribution, covered the conventional bridge only whereas the curved bridges yet remain hidden. The complexities in construction procedure and curvature provide in the curved bridge itself a unique feature. The objectives of the current study are investigating the effect of curvature, slab stiffness, girder stiffness and diaphragm spacing on live-load distribution. The numerical study consists of modeling and verification of an existing curved bridge model using ANSYS program. The analysis was performed using AASHTO HS20-44 design truck. This study shows that the live -load distribution factor of outer girder is increased about 38% for outer girder loading and 62% for inner girder loading with a decreasing radius of curvature. On the other hand, the distribution factor of inner girder is decreased about 78% and 36.5% for outer and inner girder loading respectively. The numerical analysis explored the live-load distribution for shear.