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Effects of shear strengthening with GFRP on reinforced concrete beams
An ANSYS finite element model is used to study the effects of shear strengthening by comparing the behaviors of two full-scale reinforced concrete beams (a reinforced concrete beam with no shear stirrups; and a reinforced concrete beam externally reinforced with Glass Fiber Reinforced Polymer (GFRP) on both sides of the beam). Experimental beams replicated the transverse members from the Horsetail Creek Bridge, which are deficient in shear reinforcement. Three-dimensional finite element models are developed using a smeared cracking approach for the concrete and three-dimensional layered elements for the FRP composites. It was found that the general behaviors through the linear and nonlinear ranges up to failure of the finite element models show good agreement with observations and data from the experimental full-scale beam tests. The addition of GFRP reinforcement to the control beam shifts the behavior of the actual beam and model from a sudden shear failure near the ends of the beam to flexure failure by steel yielding at the midspan. The shear reinforcement increases the load carrying capacity by 45% for the experimental beam and by 15% for the finite element model. This finite element model can be used in additional studies to develop design rules for strengthening reinforced concrete bridge members using FRP.
Effects of shear strengthening with GFRP on reinforced concrete beams
An ANSYS finite element model is used to study the effects of shear strengthening by comparing the behaviors of two full-scale reinforced concrete beams (a reinforced concrete beam with no shear stirrups; and a reinforced concrete beam externally reinforced with Glass Fiber Reinforced Polymer (GFRP) on both sides of the beam). Experimental beams replicated the transverse members from the Horsetail Creek Bridge, which are deficient in shear reinforcement. Three-dimensional finite element models are developed using a smeared cracking approach for the concrete and three-dimensional layered elements for the FRP composites. It was found that the general behaviors through the linear and nonlinear ranges up to failure of the finite element models show good agreement with observations and data from the experimental full-scale beam tests. The addition of GFRP reinforcement to the control beam shifts the behavior of the actual beam and model from a sudden shear failure near the ends of the beam to flexure failure by steel yielding at the midspan. The shear reinforcement increases the load carrying capacity by 45% for the experimental beam and by 15% for the finite element model. This finite element model can be used in additional studies to develop design rules for strengthening reinforced concrete bridge members using FRP.
Effects of shear strengthening with GFRP on reinforced concrete beams
Potisuk, T. (author) / Kachlakev, D.I. (author) / Miller, T.H. (author) / Yim, S.C.S. (author)
2001
13 Seiten, 22 Quellen
Conference paper
English
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