Flexural Fatigue Behavior of Reinforced Concrete Beams Strengthened with FRP Fabric and Precured Laminate Systems


Rehabilitation of existing structures with carbon fiber reinforced polymers (CFRP) has been growing in popularity because they offer resistance to corrosion and a high stiffness-to-weight ratio. This paper presents the flexural strengthening of seven reinforced concrete (RC) beams with two FRP systems. Two beams were maintained as unstrengthened control samples. Three of the RC beams were strengthened with CFRP fabrics, whereas the remaining two were strengthened using FRP precured laminates. Glass fiber anchor spikes were applied in one of the CFRP fabric strengthened beams. One of the FRP precured laminate strengthened beams was bonded with epoxy adhesive and the other one was attached by using mechanical fasteners. Five of the beams were tested under fatigue loading for two million cycles. All of the beams survived fatigue testing. The results showed that use of anchor spikes in fabric strengthening increase ultimate strength, and mechanical fasteners can be an alternative to epoxy bonded precured laminate systems.


Civil, Architectural and Environmental Engineering


United States. Federal Highway Administration

Keywords and Phrases

Carbon Fiber Reinforced Polymers (CFRP); FRP Fabric; Fatigue Testing; Flexural Fatigue Behavior; Glass Fiber Anchor Spikes; Precured Laminate Systems; Reinforced Concrete; Stiffness-To-Weight Ratio

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


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© 2006 American Society of Civil Engineers (ASCE), All rights reserved.

Publication Date

01 Jan 2006