Pullout Response of a Smooth Fiber with an End Anchorage

Sujivorakul, Chuchai; Waas, Anthony M.; Naaman, Antoine E.

doi:10.1061/(asce)0733-9399(2000)126:9(986)

Cited by 57 publications

(31 citation statements)

References 12 publications

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“…4b), as has been observed in testing programs (Lin and Li 1997;Shao et al 1993;Wang et al 1988). Alternatively, the spring properties can be based on a force-pullout relationship (rather than a constitutive model of the interface), so that the effects of geometrical deformations of the fiber can be included in the post-cracking response of the fiber (Sujivorakul 2000). However, for the case where the length of such fibers (e.g.…”

Section: Lattice Model Of Cement-based Matrixmentioning

confidence: 98%

Fracture of fiber-reinforced cement composites: effects of fiber dispersion

2008

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Short-fiber reinforcement is commonly used to improve various properties of cement-based materials, including their resistance to shrinkage cracking, post-cracking strength, and toughness. The spatial distribution of fibers within a structural component exhibits local variations that depend on many factors, including the methods of production. Local measures of fiber volume fraction can be much lower than the global average and such regions can act as flaws within the composite material. In addition, fiber orientation is restricted by any near surfaces of the structural component. Such non-uniformities of the fiber distribution can significantly affect fracture behavior and complicate the interpretation of fracture test results. This paper concerns the computational modeling of fiberreinforced cement composites (FRCC), with attention to the effects of non-uniform fiber distributions. The simulations utilize lattice models of the matrix phase of the composite, based on the Voronoi tessellation of irregularly positioned nodes within the structural domain. A crack band approach provides energyconserving, mesh-insensitive descriptions of fracture through the irregular lattice. Each fiber is explicitly modeled within the lattice framework. The fiber distributions are synthetically constructed within the structural domain, although experimentally determined fiber positions could be used. Models of simple tensile tests demonstrate a dependence of post-cracking strength and toughness on the spatial distributions of the fibers.

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Section: Lattice Model Of Cement-based Matrixmentioning

confidence: 98%

Fracture of fiber-reinforced cement composites: effects of fiber dispersion

2008

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“…The latter's contribution is considered a function of the work needed to straighten the fibre during pull-out. Sujivorakul et al (2000) extended the straight fibre pull-out analysis developed by Naaman et al (1991a) by adding a non-linear spring to the end of the fibre to simulate the mechanical anchorage contribution.…”

Section: Introductionmentioning

confidence: 99%

Comparisons Between Pull-Out Behaviour of Various Hooked-End Fibres in Normal–High Strength Concretes

Abdallah

Rees

2019

Int J Concr Struct Mater

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In this paper an elastic-plastic response has been developed to predict the pull-out behaviour of various hooked end fibres embedded in normal-high strength concretes. An elastic-plastic moment expression has been proposed to represent the partially plastic hinge formed during pull-out. The proposed formula has been incorporated into a frictional pulley force analysis in order to predict the applied loading at each stage of pull-out. This prediction accounts for the variation of geometrical and tensile properties of the fibres as well as concrete strength. The proposed model is validated against experimental pull-out results of various hooked end fibres.

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“…This expression may be established in terms of forces [34,35] or, as is the case of this paper, may be derived in terms of slip [19,36]. In the following lines, a brief overview of the analytical formulation used in this paper is presented, being possible to find more details elsewhere [19,37].…”

Section: Local Bond Slip and Pullout Load-slip Relationshipmentioning

confidence: 99%

Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips

Garzón-Roca

Sena-Cruz

Fernandes

et al. 2015

Composite Structures

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ElsevierGarzón-Roca, J.; Sena-Cruz, JM.; Fernandes, P.; Xavier, J. (2015). Effect of wet-dry cycles on the bond behavior of concrete elements strengthened with NSM CFRP laminate strips. Composite Structures. 132:331-340. doi:10.1016Structures. 132:331-340. doi:10. /j.compstruct.2015 AbstractThe near-surface mounted (NSM) strengthening technique is capable of effectively increase the bearing capacity of structural concrete elements. This technique which basically consists of placing FRP reinforcements inside small grooves cut in the concrete cover, has been widely investigated in terms of structural performance and ability to improve the flexural and shear behaviour of reinforced concrete beams and columns. However, little research has been carried out concerning to the NSM long-term performance and durability. Motivated by the need of increasing the knowledge on the expected durability of the NSM technique using CFRP laminates, this paper presents an experimental program in which direct pull-out tests are carried out for evaluating the bond behaviour of specimens aged through wet-dry cycles. A total of 30 specimens are tested, analysing the effect of the bond length, the groove width, the groove depth and the aging effect on the bond behaviour. Digital image correlation method is also used to identify the bond resistant mechanism developed in an element strengthened using NSM technique. Finally, using the experimental results, an analytical-numerical strategy is applied to establish the local bond stress-slip relationship.

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Pullout Response of a Smooth Fiber with an End Anchorage

Cited by 57 publications

References 12 publications

Fracture of fiber-reinforced cement composites: effects of fiber dispersion

Fracture of fiber-reinforced cement composites: effects of fiber dispersion

Comparisons Between Pull-Out Behaviour of Various Hooked-End Fibres in Normal–High Strength Concretes

Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips

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