A STUDY ON NONLINEAR ANALYSIS OF STEEL MEMBERS SUBJECTED TO AXIAL FORCES WITH ADHESIVELY BONDED CFRP

Abstract

Repair and reinforcement using CFRP sheets is currently being promoted for corrosion damage of steel bridges. On the other hand, it is expected that the limit state design method will be applied to repair and reinforcement in the future. In this study, we investigated an analytical method that can reproduce the nonlinear behavior of CFRP laminated steel members caused by the high elongation elastic putty material used to prevent of delamination. As a result, a method was obtained to model the resin material with interface elements. The stress reduction effect of the putty material and the delamination of the sheet can be reproduced by using a quadrilateral distribution as the shear stress-relative displacement relation of the putty material.