Experimental and analytical investigation of FRP strengthened beam response: Part I

Quantrill, R. J.; Hollaway, L.; Thorne, A.M.

doi:10.1680/macr.1996.48.177.331

Cited by 131 publications

(27 citation statements)

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“…Consequently, many studies have been carried out in order to understand the failure mechanism of plated or connected beams [1][2][3][4][5][6][7][8][9][10][11][12][13][14] or laminated glass [15]. These studies converge to an important aspect: the presence of shear and normal stresses at the plate-core interface.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…The sophistication of these techniques ranges from simple methods of enlargement of cross sections including the use of concrete overlays (Saiidi et al 1990;Trikha et al 1991) to advanced methods in which strengthening is achieved using externally bonded steel plates, external post-tensioning, carbon fibers, etc. Strengthening techniques of beams include external prestressing using steel or carbon fiber reinforced tendons (Federation 1991;Basler and Vaneck 2003;Ha Minh and Kyoji 2007), epoxy-or mechanical-bonded steel or plastic plates (Quantrill et al 1996a;Quantrill et. al.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Beams Strengthened with Steel Fiber RC Overlays

Ziara¹

2009

ACT

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Strengthening of reinforced concrete beams using steel fiber reinforced concrete (SFRC) overlays has been investigated in the test program described in this paper. Two methods have been used to connect the overlays to the original beams, i.e. chemical and mechanical bonding. In the chemical bonding, 2-component epoxy resin bonding agent has been used. The mechanical bonding was achieved by welding the stirrups in the overlays to the stirrups in the original beams only near each support. In general, the weld bonded strengthened beams have achieved a better structural behavior in terms of load carrying capacity and failure mode compared to the epoxy bonded beams. The epoxy bonded beams have reached same load and ductility levels obtained from an identical monolithically cast control beam which was included in the test program for comparison purposes. However, at failure separation cracks have occurred at the common interface between the overlays and the original beams. On the other hand, the weld bonded strengthened beams have behaved in a flexural ductile manner and achieved higher load carrying capacity compared to the control beam. The interlaminar shear failure did not occur in these beams which have acted as a single unit up to the failure.

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“…To mitigate the shear and peeling stresses near the ends of the repairing plates, different techniques, such as using anchor bolts and anchor plates, have been experimentally investigated [4,[6][7][8]. Analytical prediction models for the shear and peeling stresses have also been established [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%