Fatigue Behavior of Cast-in-Place and Precast Panel Bridge Decks With Isotropic Reinforcement

R. E. Klingner Phil M. Ferguson Professor in Civil Engineering The University of Texas at Austin Austin , Texas R ecent research in the United Statesu and CanadaH has suggested that the flexural capacity of bridge decks is increased by in-plane compressive forces, created when the cracked deck is restrained by supports that cannot move laterally. This phenomenon, commonly referred to as "arching action," is the basis for the semiempirical design provisions of the current Ontario (Canada) Bridge Design Code.9 That code permits the use of less flexural steel than would be required by current AASHTO Specifications,w resulting in bridge decks which are generally more economical and resistant to corrosion.