Design of FRP Systems for Strengthening Concrete Girders in Shear (2011) / Chapter Skim
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The use of FRP composites in rehabilitating structures has grown in popularity due to its advantages over conventional materials and wide range of structural applications. FRP systems for strengthening reinforced or prestressed concrete girders consist of externally bonded laminates or near-surface mounted bars.
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To accomplish this objective, the research involved the following tasks: • Study and review relevant practices, existing models and specifications, and research findings from both foreign and domestic sources regarding the use of externally bonded FRP for shear strengthening of concrete girders. • Identify and evaluate criteria that influence the performance of FRP shear strengthening systems based on review of the literature (including the development of a database of tests related to FRP shear strengthening)
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, externally bonded FRP shear reinforcement may experience debonding if proper anchorage is not provided. If stress in the stirrups can be maintained below the yield strength, the externally bonded FRP shear strengthening can help delay fatigue yielding of the stirrups and extend the fatigue life of the girder.
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