Interfacial stresses in externally FRP-plated concrete beams

Tounsi, Abdelouahed; Benyoucef, Samir

doi:10.1016/j.ijadhadh.2006.01.009

Cited by 63 publications

(42 citation statements)

References 30 publications

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“…In order to check the present method, it is chosen to compare it with the closed-form solution presented by Tounsi et al [23] in which a sensitivity analysis on the fiber orientation of the CFRP bonded plate has been performed. It has been particularly shown that the minimum of shear and normal stresses is reached when all the fibers of each layer are oriented perpendicularly to the longitudinal axis of the CFRP bonded plate.…”

Section: Model Prediction Results and Validationmentioning

confidence: 99%

“…In fact, these stresses can produce the brittle fracture of the concrete layer, which supports the composite laminate, followed by the premature failure of the strengthened beam. Many closedform solutions have been developed by researchers for the interfacial stresses [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Smith and Teng's solution [21] gives an accurate estimation of interfacial stresses but does not take into account the FRP plate fiber orientation.…”

Section: Introductionmentioning

confidence: 99%

“…Tounsi and Benyoucef [23] have presented a new method in which the FRP plate fiber orientation is considered and the flexural rigidity of the composite plate is not neglected. A sensitivity analysis has been presented considering different fibers orientation combinations.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the same approach as Tounsi and Benyoucef [23] for interfacial stresses expressions is considered. However a new method enabling to obtain the minimum of interfacial stresses by minimizing process is presented.…”

Section: Introductionmentioning

confidence: 99%

“…However a new method enabling to obtain the minimum of interfacial stresses by minimizing process is presented. This process gives directly the fibers orientation combination presenting the minimum of debonding risk conversely to Tounsi and Benyoucef [23] where a parameter study varying fiber orientation combinations is used. A Finite Element investigation is also presented in this paper to verify the analytical method and to test the strengthening quality of the optimum solution for debonding stresses.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Fibers orientation optimization for concrete beam strengthened with a CFRP bonded plate: A coupled analytical–numerical investigation

Krour

Bernard

Tounsi

2013

Engineering Structures

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Important failure mode of such plated beams is the debonding of the FRP plates from the concrete due to high level of stress concentration in the adhesive at the ends of the FRP plate. This paper presents a new method for reducing interfacial stresses in a concrete beam bonded with the FRP plate by including the effect of the fiber orientation in the FRP plate. This work is divided into two parts; the first one is based on the laminates theory for the analytical solution where a minimization method is used to directly determine the fiber orientation reducing the interfacial stresses. The second part consists into a Finite Element modeling where the analytical solution and different fibers orientation combinations are tested for improving strengthening quality. Numerical results from the present analysis are presented in order to show the advantages of the present solution over existing ones and to reconcile debonding stresses with strengthening quality.

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Section: Model Prediction Results and Validationmentioning

confidence: 99%