STUDY ON CHARACTERISTICS OF BENDING RESISTANCE TO COMPOSITE I-GIRDERS USING HIGH STRENGTH STEELS ALLOWING FOR YIELDING

Abstract

Aiming at lengthening the composite I-girder bridges utilizing high strength steels, positive bending tests of a composite I-girder using high strength steels were conducted. Then the failure mode and the bending resistance were investigated. After that, FE-analyses were carried out and the analytical results were verified on the basis of comparison with the test results. Moreover, based on the test results and the analytical results on parameters of steel strength and concrete strength, bending resistance reduction equations to premature crushing of the concrete deck were proposed, and the characteristics of bending resistance to composite I-girders using high strength steels allowing for yielding were clarified.