EXPERIMENTAL STUDY ON RESISTANCE MECHANISM OF STUD AND BEARING AT STEEL GIRDER EMBEDDED CORNER ON JOINTLESS ABUTMENT BRIDGES FOR JAPANESE HIGHWAYS

Abstract

 This paper describes experiments of superstructure/substructure joints for steel bridges, focused on number of studs, embedded length of steel girder, gaps between steel girders and flesh concrete, and bonding effect with reinforcing bar at steel girder embedded corner. Twelve cases of cyclic loading tests were conducted for clarifying these effects, resistance mechanism and resistance rate shared by each item of steel superstructure/substructure joints. Based on these results, along with that evaluating present expression for bearing under lower flange, new evaluation of punching shear force above upper flange is proposed herein.