Prediction of Tensile Capacity of Bond Anchorages for FRP Tendons

Zhang, Burong; Benmokrane, Brahim; Chennouf, Adil

doi:10.1061/(asce)1090-0268(2000)4:2(39)

Cited by 65 publications

(35 citation statements)

References 10 publications

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“…The relation between the limit crack depth and the distance between inner resultant forces is evaluated in equation (5). The latter could be determined by both cases of curved or equivalent rectangular diagrams of concrete stress distribution within the compressive zone.…”

Section: Flexural Strength Of Rc Membersmentioning

confidence: 99%

Load-bearing capacity of flexural reinforced concrete members strengthened with fiber-reinforced polymer in fracture stage

Šlaitas

Valivonis

Juknevičius

et al. 2018

Advances in Mechanical Engineering

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The article examines the behavior of flexural reinforced concrete members, strengthened with fiber-reinforced polymers (FRP), under the ultimate loading conditions (in fracture stage). One of the main problems of such elements is sudden and brittle failure mode caused by FRP debonding. The method for the calculation of load-bearing capacity of the normal section of flexural reinforced concrete members, strengthened with various types of FRP, is proposed in this article. This method is based on the theory of fracture mechanics of solids. The reduction of overall member stiffness due to the slip between concrete and FRP is estimated by reducing the FRP stress according to the built-up bars theory. Such reduction allows the prediction of load-bearing capacity of strengthened members sufficiently precisely even for sudden and brittle FRP debonding failure mode. The numerical results are compared with experimental ones. In total, 55 reinforced concrete beams, strengthened with externally bonded or near surface mounted carbon fiber-reinforced polymer and glass fiber-reinforced polymer sheets, plates, strips, and rods, are analyzed in this comparison. Experimental results were collected from various scientific publications. A focus is made on the depth of the crack in critical normal section and FRP strain-stress relationship.

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Section: Flexural Strength Of Rc Membersmentioning

confidence: 99%

Load-bearing capacity of flexural reinforced concrete members strengthened with fiber-reinforced polymer in fracture stage

Šlaitas

Valivonis

Juknevičius

et al. 2018

Advances in Mechanical Engineering

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“…A theory was proposed to calculate the ultimate capacity of a straight-pipe bonding anchor [18]. The shear stress distribution along the rod was simplified to three parts.…”

Section: Mechanical Analysis Of Shear Stress Distributionmentioning

confidence: 99%

“…An elastic theoretical model is proposed in this paper to calculate shear stress referring to [18,19]. It generalizes the regularities of the shear stress distribution at the CFRP-adhesive interface.…”

Section: Mechanical Analysis Of Shear Stress Distributionmentioning

confidence: 99%

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Mechanical Analysis of Stress Distribution in a Carbon Fiber-Reinforced Polymer Rod Bonding Anchor

et al. 2014

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This paper presents an elastic shear stress distribution theoretical model at the carbon fiber-reinforced polymer (CFRP)-adhesive interface of a single-rod and a multi-rod straight-pipe bonding anchor. A comparison between theoretical and finite element analysis results reveals that the accuracy of the theory can be used to guide the preliminary design of CFRP rod bonding anchors. The mechanical performance of the inner cone bonding anchor for multi-rods are evaluated within different coefficients of friction and inner inclined angles. Numerical results indicate that the straight-parabolic inner cone bonding anchor has a significant effect on reducing the shear force at the loading end.

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“…These types of anchorages deserve more attention in practical applications due to the high axialto-lateral strength of FRP materials [22]. The bonded anchorage is one of the currently-used methods for FRP rods, in which a FRP rod is bonded into a steel pipe or tube filled with cement or resin grout [32]. The steel pipe or tube acts as an infinite rock mass [30].…”

Section: Introductionmentioning

confidence: 99%

Analytical solution for the pull-out response of FRP rods embedded in steel tubes filled with cement grout

Yang

Zheng

et al. 2009

Mater Struct

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Fiber-reinforced plastic (FRP) tendons have been widely used for ground anchors in civil engineering. Although various pull-out tests of FRP rods from grout-filled steel tubes have been conducted to simulate ground anchors in rock, there are relatively few theoretical studies reported in the literature for this type of bonded anchorages. The intention of this paper is to present an analytical solution for predicting the maximum pull-out load of FRP rods embedded in steel tubes filled with cement grout. First, the expression of the shear stress along the thickness direction of the grout layer is obtained analytically. The tensile stress in the rod and the interfacial shear stress at the rodgrout interface are formulated at different loading stages. By modeling interfacial debonding as an interfacial shear crack, the pull-out load is then expressed as a function of the interfacial crack length. Finally, based on the Lagrange multiplier method, the maximum pull-out load and the critical crack length are determined. The validity of the proposed analytical solution is verified with the experimental results obtained from literature. It can be concluded that the proposed analytical solution can predict the maximum pull-out load of spiral wound and indented rods embedded in steel tubes filled with cement grout with reasonable accuracy. The proposed solution can be also applied in predicting the pull-out capacity of steel bars from concrete.

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Prediction of Tensile Capacity of Bond Anchorages for FRP Tendons

Cited by 65 publications

References 10 publications

Load-bearing capacity of flexural reinforced concrete members strengthened with fiber-reinforced polymer in fracture stage

Load-bearing capacity of flexural reinforced concrete members strengthened with fiber-reinforced polymer in fracture stage

Mechanical Analysis of Stress Distribution in a Carbon Fiber-Reinforced Polymer Rod Bonding Anchor

Analytical solution for the pull-out response of FRP rods embedded in steel tubes filled with cement grout

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