Analytical Modeling of Reinforced Concrete Beams Strengthened with Mechanically Fastened Fiber-reinforced Polymers (MF-FRP)

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Title: Analytical Modeling of Reinforced Concrete Beams Strengthened with Mechanically Fastened Fiber-reinforced Polymers (MF-FRP)

Author(s): Gordon Salisbury and Vicki Brown

Publication: Special Publication

Volume: 304

Issue:

Appears on pages(s): 65-84

Keywords: beam; concrete expansion anchors; deflection; mechanically fastened fiber-reinforced polymer (MF-FRP); strain

Date: 10/27/2015

Abstract:
This paper presents a detailed investigation into the load-deformation response of reinforced concrete beams strengthened with mechanically fastened fiber-reinforced polymers (MF-FRP). A bearing-slip model was developed for MF-FRP connections fastened with concrete expansion anchors. The model was used to predict the interfacial change in strain between the concrete and the FRP. When combined with load deformation constitutive equations, the bearing-slip model better predicted the load-deformation behavior in MF-FRP strengthened concrete beams. Comparisons to experimental data showed that the developed method reasonably predicts (typically within 8%) actual beam response at ultimate load. Moment-curvature diagrams were also developed and used to predict midspan deflection, typically within 30% of experimental results.