Deterioration Analysis of Concrete Bridges Under Inadmissible Loads from the Fatigue Point of View


School of Railway Engineering,Iran University of Science and Technology


Despite the importance of the effects of inadmissible loads in the reduction of the life cycle and operation time of bridges, there is no scientific and systematic procedure for the deterioration analysis of bridges under overloaded vehicles. The main objective of this article is to outline a methodology for determining the damage effects of inadmissible loads on concrete bridge decks, considering the fatigue effect. With recourse to the fatigue phenomenon, the relationships between the passing loads and the number of allowable load cycles were determined. These relationships were the bases for constructing models by which the deterioration ratios of concrete bridges could be assessed and, consequently, the amount of fines for vehicles can be calculated.