Assessment of Carbon Fiber Reinforced Polymer Repair for Laterally Damaged Prestressed Concrete Girders

ElSafty, Adel; Graeff, Matthew K.; Fallaha, Sam

doi:10.1520/acem20130083

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…This section provides recommendations for the repair of girders with flexural deficiency, based on the repair case studies found in 151 studies, including both research and real-life applications of the repairs which are both critical for achieving a sufficient understanding of a repair technique. Eight different methods were found in the literature: (1) EB FRP sheets on the soffit + EB FRP U-wraps or complete wraps [ 24 , 46 , 65 , 67 , 75 , 76 , 89 , 101 , 102 , 103 , 111 , 117 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 , 131 , 132 , 133 , 134 , 135 , 136 , 137 , 138 , 139 , 140 , 141 , 142 , 143 , 144 , 145 , 146 , 147 , 148 , 149 , 150 , 151 , 152 ]; (2) EB continuous FRP U-wraps [ 17 , 38 ,…”

Section: Repair For Flexurementioning

confidence: 99%

Synthesis of Repair Materials and Methods for Reinforced Concrete and Prestressed Bridge Girders

Ghaffary

Moustafa

2020

Materials

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Bridge structures nationwide across the United States are aging and in need of repair or, in some cases, full replacement. Repair decisions are common among bridge owners because of the economic feasibility when compared to the higher cost of full replacement of damaged or deteriorated bridge components such as girders. Using a proper repair approach, as a long-term or just a short-term solution, can lead to benefits that could not be achieved otherwise such as considerable savings in both time and cost. Additionally, an appropriate repair approach can help avoid adverse environmental impacts, interruptions to service, overburdening of nearby infrastructure, and local opposition to construction. The main objective of this paper is to provide a synthesis of the repair methods and materials for reinforced concrete bridge girders proposed in research studies, i.e., state-of-the-art as well as state-of-the-practice established methods. Different steps in the general repair procedure are explained first. Next, a detailed description of three common bridge girder deficiencies, i.e., shear, flexural, and fire damage, is provided. For each damage type, the main causes and common solutions found in the literature are presented. The authors then provide specific recommendations to each repair procedure. This is intended to enable researchers, engineers, and decision makers to compare the available repair methods more conveniently to find the optimal repair approach for specific projects based on economic and environmental requirements as well as structural and construction conditions.

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Section: Repair For Flexurementioning

confidence: 99%

Synthesis of Repair Materials and Methods for Reinforced Concrete and Prestressed Bridge Girders

Ghaffary

Moustafa

2020

Materials

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“…However, there is still a need to fully understand the chemical bond between steel and CFRP in large steel structures, as most analytical work has been implemented on above ground structures, such as bridges, buildings, and aircrafts [15]. The majority of analytical studies investigate the crack growth behavior of a beam in bending [16,17,18]. Few analytical studies combine the crack growth behavior with the bond-slip behavior of the CFRP patch repairs [19,20,21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Effects of Adhesive Bond-Slip Behavior on the Capacity of Innovative FRP Retrofits for Fatigue and Fracture Repair of Hydraulic Steel Structures

Lozano

Riveros

2019

Materials

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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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Assessment of Carbon Fiber Reinforced Polymer Repair for Laterally Damaged Prestressed Concrete Girders

Cited by 2 publications

References 9 publications

Synthesis of Repair Materials and Methods for Reinforced Concrete and Prestressed Bridge Girders

Synthesis of Repair Materials and Methods for Reinforced Concrete and Prestressed Bridge Girders

Effects of Adhesive Bond-Slip Behavior on the Capacity of Innovative FRP Retrofits for Fatigue and Fracture Repair of Hydraulic Steel Structures

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