Effects of Adhesive Bond-Slip Behavior on the Capacity of Innovative FRP Retrofits for Fatigue and Fracture Repair of Hydraulic Steel Structures
United States Army Corps of Engineers Engineer Research and Development Center, Vicksburg, MS 39180-6199, USA
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Materials 2019, 12(9), 1495; https://doi.org/10.3390/ma12091495
Received: 20 April 2019
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Revised: 3 May 2019
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Accepted: 4 May 2019
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Published: 8 May 2019
(This article belongs to the Special Issue Behavior of Metallic and Composite Structures)
Over eighty percent of the navigation steel structures (NSS) in the United States have highly deteriorated design boundary conditions, resulting in overloads that cause fatigue cracking. The NSSs’ highly corrosive environment and deterioration of the protective system accelerate the fatigue cracking and cause standard crack repair methods to become ineffective. Numerous studies have assessed and demonstrated the use of carbon fiber reinforced polymers (CFRP) to rehabilitate aging and deteriorated reinforced concrete infrastructure in the aerospace industry. Due to the increase of fatigue and fracture failures of NSS and the shortage of research on CFRP retrofits for submerged steel structures, it is imperative to conduct research on the effects of CFRP repairs on NSS, specifically on the adhesive’s chemical bonding to the steel substrate. This was accomplished by developing a new analytical algorithm for CFRP bond-slip behavior, which is based on Volkersen’s contact shear single lap joint (SLJ) connection. The algorithm was validated by experimental results of fatigue center-cracked large steel plates repaired with CFRP patches. The state of stresses at the crack tip are largely influenced by a combination of the crack tip plasticity radius and overall bond surface area.
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Keywords:
carbon fibers; fatigue and fracture repairs; hydraulic steel structures; extended finite element; bond-slip; traction-separation; cohesive damage
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MDPI and ACS Style
Lozano, C.M.; Riveros, G.A. Effects of Adhesive Bond-Slip Behavior on the Capacity of Innovative FRP Retrofits for Fatigue and Fracture Repair of Hydraulic Steel Structures. Materials 2019, 12, 1495. https://doi.org/10.3390/ma12091495
AMA Style
Lozano CM, Riveros GA. Effects of Adhesive Bond-Slip Behavior on the Capacity of Innovative FRP Retrofits for Fatigue and Fracture Repair of Hydraulic Steel Structures. Materials. 2019; 12(9):1495. https://doi.org/10.3390/ma12091495
Chicago/Turabian StyleLozano, Christine M., and Guillermo A. Riveros. 2019. "Effects of Adhesive Bond-Slip Behavior on the Capacity of Innovative FRP Retrofits for Fatigue and Fracture Repair of Hydraulic Steel Structures" Materials 12, no. 9: 1495. https://doi.org/10.3390/ma12091495
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