EXPERIMENTAL STUDY ON SHEAR FATIGUE BEHAVIOR OF ADHESIVELY BONDED JOINT IN ORTHOTROPIC STEEL DECK OVERLAID WITH SFRC

Abstract

 As an effective measure to prevent the fatigue cracks, steel-fiber reinforced concrete (SFRC) overlays have been used for existing damaged OSDs. It has been confirmed that they can drastically decrease the out-of-plane deformation of the deck plate and greatly reduce the local stress of the weld root portion where the cracks initiate. However, there is no sufficient data to confirm its durability. It is important to investigate the durability performance under the effect of wheel loading and environmental action. For the purpose of evaluating the retrofit performance under severe service condition, shear fatigue tests of the adhesively bonded joints at deck-to-overlay connection were carried out using small size specimens with two different adhesives. This paper reports the trends of S-N curves and their fatigue behavior.