Reinforcement optimization of fiber reinforced concrete linings for conventional tunnels

Tiberti, Giuseppe; Minelli, Fausto; Plizzari, Giovanni

doi:10.1016/j.compositesb.2013.10.012

Cited by 74 publications

(32 citation statements)

References 14 publications

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“…Inverse analysis, or back calculation, is a useful tool extensively used to determine best‐fitting stress–strain (or stress‐crack) relations for SFRC from flexural tests . Kooiman et al, Barros et al, and Neocleous et al have suggested that the flexural behavior of SFRC prisms with up to 140 kg/m 3 of MSF can be simulated well using a trilinear relation.…”

Section: Numerical Researchmentioning

confidence: 99%

Postcracking tensile behavior of blended steel fiber‐reinforced concrete

Wang

Figueiredo

et al. 2018

Structural Concrete

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Fiber blends have the potential to improve the mechanical and sustainability credentials of steel fiber‐reinforced concrete (SFRC), but at which ratios these can work is not known a priori. This paper investigates the uniaxial tensile stress–strain ( σ − ε) relationship of blended SFRC using manufactured steel fibers on their own, or blended with sorted steel fibers recycled from end‐of‐life tires (recycled tire steel fiber [RTSF]), at total fiber dosages of 30, 35, and 45 kg/m3. The accuracy of two σ − ε relations proposed by RILEM TC 162‐TDF and Model Code 2010 is assessed using the experimental results from concrete prisms. By using nonlinear finite element (FE) analysis, it is found that the RILEM approach can lead to significant overestimation (up to 72%) of peak flexural load and energy absorption capacity (up to 39%), while the Model Code 2010 can provide a rather accurate prediction of the energy absorption capacity and some overestimation (less than 34%) of the peak flexural load. Inverse FE analysis is used to determine indirectly the uniaxial tensile σ − ε relations of the examined SFRC mixes, and a simplified trilinear relation for SFRC is proposed. It is concluded that the tensile strength of SFRC with RTSF at a low total fiber dosage is only marginally improved by fiber addition, and the postcracking tensile strengths at different strains can be determined directly from residual flexural tensile strengths (f Ri) of prisms.

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Section: Numerical Researchmentioning

confidence: 99%

Postcracking tensile behavior of blended steel fiber‐reinforced concrete

Wang

Figueiredo

et al. 2018

Structural Concrete

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“…Unlike other similar studies [10,11]], this research not only intends to compare SRDP to other tests, but especially aims at establishing SRDP as a comprehensive and reliable test for the FRC characterization, with special focus on those structural applications in which FRC is provided in small thickness, i.e. sprayed concrete or tunnel lining applications [12], structural plaster overlays for retrofitting [13] and thin webbed elements.…”

Section: Introductionmentioning

confidence: 99%

Derivation of a simplified stress–crack width law for Fiber Reinforced Concrete through a revised round panel test

Minelli

Plizzari

2015

Cement and Concrete Composites

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“…in precast tunnel segments [5] or in beams where little or no shear reinforcement is provided [6]. In several of these applications, the reinforcement generally consists of a combination of conventional rebars and fibers [7]. In the case of rather tough FRC, a total substitution of the secondary or web reinforcement could be also achieved [8].…”

Section: Introductionmentioning

confidence: 99%