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Report Details

Title:Composite-Based Rehabilitation of Constructed Bridge Girders with Grooved Geometrics
Authors:Yail Jimmy Kim
Publication Date:Oct 2019
Report #:MPC-19-402
Project #:MPC-554
TRID #:01722074
Keywords:bonding, carbon fibers, composite materials, debonding, epoxides, fiber reinforced polymers, girder bridges, girders, rehabilitation (maintenance), shear stress

 

Abstract

This report presents a research program studying the grooved bonding schemes of composite sheets (carbon fiber reinforced polymer, CFRP) for rehabilitating concrete members. The first phase of the research presents the efficacy of functional periodicity on controlling the occurrence of interfacial failure in concrete members strengthened with CFRP sheets. The hypothesis tested was that periodically placed stress reducers preserve the integrity of the CFRP-concrete interface by interrupting the progression of mechanical damage. The second phase of the research discusses the potential and feasibility of an alternative bonding method for strengthening reinforced concrete beams with CFRP sheets. Periodic grooves were cut along the tensile soffit of the beams, in the transverse direction, on which CFRP was bonded and filled with an epoxy adhesive to lessen interfacial stresses. The tested bonding schemes comprised three grooves in the vicinity of CFRP-termination and uniformly distributed grooves in the beam span. The behavior of these beams was investigated in comparison with that of unstrengthened and conventional CFRP-bonded beams with plain substrates.

How to Cite

Kim, Yail Jimmy. Composite-Based Rehabilitation of Constructed Bridge Girders with Grooved Geometrics, MPC-19-402. North Dakota State University - Upper Great Plains Transportation Institute, Fargo: Mountain-Plains Consortium, 2019.

NDSU Dept 2880P.O. Box 6050Fargo, ND 58108-6050
(701)231-7767ndsu.ugpti@ndsu.edu