Numerical-aided flexural-based design of fibre reinforced concrete column-supported flat slabs

Nogales, Alejandro; Fuente, Albert de la

doi:10.1016/j.engstruct.2020.111745

Cited by 21 publications

(15 citation statements)

References 67 publications

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“…This software presents a versatile tool to successfully model a wide range phenomenon of concrete structure behavior, as evidenced by numerous published studies. [42][43][44][45] The CDP model is a continuum, smeared crack, plasticity-based, damage model for concrete. In smeared crack models, the damage zone is assumed to coincide with the FE dimensions.…”

Section: Selection Of Constitutive Modelsmentioning

confidence: 99%

“…The concrete damage plasticity (CDP) model available in ABAQUS 41 is used. This software presents a versatile tool to successfully model a wide range phenomenon of concrete structure behavior, as evidenced by numerous published studies 42–45 . The CDP model is a continuum, smeared crack, plasticity‐based, damage model for concrete.…”

Section: Calibration and Validation Of The Numerical Model For Hrc Beamsmentioning

confidence: 99%

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Rotation and moment redistribution capacity of fiber‐reinforced concrete beams: Parametric analysis and code compliance

Nogales

Tošić

Fuente

2021

Structural Concrete

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Fiber‐reinforced concrete (FRC) has been proved to be a competitive solution for structural purposes. Extensive research has highlighted the benefits of adding fibers on the post‐cracking strength, reduced crack spacing and crack width, and improved durability, among others. However, these aspects are related to serviceability limit states, and significant work remains to be done in terms of ultimate limit state behavior of FRC members. As recent publications have emphasized, reinforced concrete beams with low reinforcement ratios may result in a reduction of deformation capacity and, hence, to a loss of ductility. To further investigate this topic, this paper presents the results of a numerical parametric study of simply and continuous supported hybrid‐reinforced concrete (HRC) beams made with different amounts of fibers and reinforcement ratios. The deformation, rotational, and moment redistribution capacity of those were assessed by means of a finite‐element model previously calibrated using experimental results available in the literature. The results showed that there is a significant reduction of rotation capacity and moment redistribution for lightly reinforced (hybrid) members. Finally, the paper contains practical recommendations in terms of minimum reinforcement ratios that guarantee adequate rotation and redistribution capacity of HRC members. As such, the results of this study can provide a contribution toward more reliable structural designs of HRC members.

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Section: Selection Of Constitutive Modelsmentioning

confidence: 99%

Section: Calibration and Validation Of The Numerical Model For Hrc Beamsmentioning

confidence: 99%

Rotation and moment redistribution capacity of fiber‐reinforced concrete beams: Parametric analysis and code compliance

Nogales

Tošić

Fuente

2021

Structural Concrete

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“…A comprehensive state-of-art on FRC slabs is given by Nogales and de la Fuente. 15 Eighteen studies were analyzed by the authors, and most of them focused on the use of SFRC and on the comparison between hybrid reinforced concrete (rebar + fibers) and traditional RC elements. Some examples of SFRC technology applied in real projects for the construction of residential flat slabs are reported in the literature: a two-storey family house (Italy), an industrial building in Como (Italy), the Ditton Nams shopping mall (Latvia), the Triangle office building (Estonia), the Rocca Al-Mare office tower (Estonia), and the LKS office building (Spain).…”

Section: Introductionmentioning

confidence: 99%

“…The literature reports several experimental studies on the use of FRC in flat slabs (see, e.g., the work of Hedebratt and Silfwerbrand, 12 Salehian and Barros, 13 and di Prisco et al, 14 among the others). A comprehensive state‐of‐art on FRC slabs is given by Nogales and de la Fuente 15 . Eighteen studies were analyzed by the authors, and most of them focused on the use of SFRC and on the comparison between hybrid reinforced concrete (rebar + fibers) and traditional RC elements.…”

Section: Introductionmentioning

confidence: 99%

Role of the tensile constitutive modeling on the structural response of fiber reinforced concrete flat slabs: A numerical study

Zani

Martinelli

Prisco

2022

Structural Concrete

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For decades, fiber reinforced concrete (FRC) has been primarily used in elements for which the consequences of potential failure are minor, like slabs on grade and precast tunnel segments, just to name a few examples. With reference to slabs supported on walls and/or columns, the use of fibers as partial or main reinforcement has increased over the last 15 years. Despite the existence of advanced design codes like the fib Model Code 2010, experimental data, and standing buildings that prove the technical feasibility of FRC, there are still barriers for its use at a wider scale. Technical aspects such as the uncertainties in the identification procedure of FRC uniaxial tensile laws and the influence of the FRC post‐cracking strength class on the serviceability and ultimate limit states response are among the factors that prevent a larger diffusion of FRC. In this paper, the role played by several tensile post‐cracking constitutive models—among those most commonly used both in research and in design practice—on the structural response of FRC flat slabs is investigated. The effect of numerical modeling choices such as (i) the influence of shell or brick elements and (ii) the influence of material homogeneity or heterogeneity along the slab thickness on the structural response of FRC flat slabs is also examined.

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“…To this end, FORM [23] has been already implemented to calibrate γsf for precast FRC tunnel linings [24] and for FRC elements without transversal reinforcement [25]. Alternatively, and specifically oriented to non-linear structural analysis, the method proposed in [26] to calibrate the global resistance safety factor -and reported in the Annex F of the EC-2-was satisfactorily used and implemented in SFRC flat slabs [27][28][29]. The test up to failure of the SFRC flat slab (200 mm thickness, and four bays of 5 × 6 m) presented in [29] (see Figure 2) proved that the design carried out combining FE-based non-linear models and the safety factor calibration approach [26] lead to safe-side results for the ultimate load [30].…”

Section: Design Basis -Safety Formatmentioning

confidence: 99%

Design of Steel Fibre Reinforced Concrete Structures According to the Annex L of the Eurocode-2 2023

Fuente¹,

Monserrat-López²,

Tošić³

et al. 2023

hya

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The Annex L of the new Eurocode – 2 gathers -for the first time- provisions for the design of Steel Fibre Reinforced Concrete (SFRC) structures. This response to the necessity of the construction sector for provisions and regulations of this composite material within the European space and this Annex is supported by the solid background derived from consistent research and experiences carried out along the last two decades. The existence of these design provisions could both favour competitiveness and enhance sustainability performance within the construction sector since new concrete reinforcement alternatives could be considered while ensuring the structural reliability level accepted for traditional reinforced concrete structures. This paper is aimed to cover -not exhaustively- all those features concerning SFRC included into the EC-2 and complement those -when considered necessary- with scientific literature.

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Numerical-aided flexural-based design of fibre reinforced concrete column-supported flat slabs

Cited by 21 publications

References 67 publications

Rotation and moment redistribution capacity of fiber‐reinforced concrete beams: Parametric analysis and code compliance

Rotation and moment redistribution capacity of fiber‐reinforced concrete beams: Parametric analysis and code compliance

Role of the tensile constitutive modeling on the structural response of fiber reinforced concrete flat slabs: A numerical study

Design of Steel Fibre Reinforced Concrete Structures According to the Annex L of the Eurocode-2 2023

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