Modelling of SFRC using inverse finite element analysis

Tlemat, H.; Pilakoutas, Kypros; Neocleous, Kyriacos

doi:10.1617/s11527-005-9010-y

Cited by 48 publications

(42 citation statements)

References 12 publications

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“…A number of available constitutive models for SFRC have been identified such as those proposed by Figueiras (1999, 2001), Lok and Pei (1996), Lok and Xiao (1999), Rilem Technical Committees (2000 and Tlemat et al (2006). The constitutive relations have been developed to describe the uniaxial tensile stress-strain relationship of SFRC.…”

Section: Tensile Behaviourmentioning

confidence: 99%

“…Lok and Xiao, 1999;Rilem Technical Committees, 2000Tlemat et al, 2006) suggests that the compressive behaviour of SFRC can be conveniently assumed to be similar to that of plain concrete. Investigations carried out by Bencardino et al (2008) support this conclusion as the observed results show that the addition of steel fibres does not significantly affect the compressive strength of concrete (with potential improved ultimate strain safely ignored).…”

Section: Compressive Behaviourmentioning

confidence: 99%

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Shear behaviour of steel-fibre-reinforced concrete simply supported beams

Abbas

Mohsin

Cotsovos

et al. 2014

Proceedings of the Institution of Civil Engineers - Structures

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The structural behaviour of steel-fibre-reinforced concrete beams was studied using non-linear finite-element analysis and existing experimental data. The work aim was to examine the potential of using steel fibres to reduce the amount of conventional transverse steel reinforcement without compromising ductility and strength requirements set out in design codes. To achieve this, the spacing between shear links was increased while steel fibres were added as a substitute. Parametric studies were subsequently carried out and comparisons were also made with BS EN 1992-1-1 predictions. It was concluded that the addition of steel fibres enhanced the load-carrying capacity and also altered the failure mode from a brittle shear mode to a flexural ductile one. The provision of fibres also improved ductility.However, interestingly it was found that adding excessive amounts of fibres led to a less-ductile response. Overall, the study confirmed the potential for fibres to compensate for a reduction in conventional shear reinforcement.energy absorption of the control specimen M rd bending moment capacity P lateral monotonic load P BMC load calculated based on bending moment capacity P max load-carrying capacity P max,EXP load-carrying capacity based on experimental data P max,DES load-carrying capacity based on current design guidelines P max,FEA load-carrying capacity based on finite-element analysis P max,0 load-carrying capacity of the control specimen P sc load calculated based on shear capacity P u ultimate load P y load at yield P y,0 load at yield of the control specimen SI stirrup spacing increased V f volume fraction of the fibres V rd shear capacity ä y deflection at yield ä u ultimate deflection ì ductility ratio ì, 0 ductility ratio of the control specimen

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Section: Tensile Behaviourmentioning

confidence: 99%

Section: Compressive Behaviourmentioning

confidence: 99%

Shear behaviour of steel-fibre-reinforced concrete simply supported beams

Abbas

Mohsin

Cotsovos

et al. 2014

Proceedings of the Institution of Civil Engineers - Structures

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“…A number of available constitutive models for SFRC have been identified such as those proposed by RILEM (2000RILEM ( , 2003; Barros (1999Barros ( , 2001; Tlemat et al (2006); Lok and Pei (1998); Lok and Xiao (1999). The constitutive relations have been developed to describe the uniaxial tensile stress-strain relationship of SFRC (in particular the post-cracking response allowing for more ductile characteristics compared to the brittle response of plain concrete).…”

Section: Sfrc Constitutive Modelsmentioning

confidence: 99%

“…Swamy and Al-Ta'an 1981;Mansur et al 1986;Bayasi and Gebman 2002;Cho and Kim 2003;Tlemat et al 2006;Campione and Mangiavillano 2008) have been carried out to study how the addition of steel fibres can improve the performance of conventionally reinforced-concrete structures. The studies have shown that steel fibres enhance the ductility of what is considered).…”

Section: Introductionmentioning

confidence: 99%

Statically-Indeterminate SFRC Columns under Cyclic Loads

Abbas

Mohsin

Cotsovos

et al. 2014

Advances in Structural Engineering

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The present study is aimed at examining the structural response of steel-fibre-reinforced concrete (SFRC) columns under reversed-cyclic loading, which were investigated by means of non-linear finite-element analysis (NLFEA). The focus was on investigating the potential of steel fibres in compensating for reduction in conventional transverse reinforcement [and thus the spacing between shear links was increased by 50% and 100% while the fibre volume fraction ( V f) was increased to 1%, 1.5%, 2% and 2.5%]. This is useful in situations where the latter is required in significant amounts (e.g. in seismic design) leading to congestion and practical difficulties in placing the links. The critical factor in the seismic response is the cyclic nature of the load, which is examined in the present research work. An interesting feature of the present research work is the consideration of statically-indeterminate SFRC columns, information on which is rare as previous research studies have focused on simply-supported beams. To address this, both indeterminacy and axial loads were considered in the present investigation. Calibration work was carried out using existing experimental data and good correlation was established between numerical and test results. Subsequently, parametric studies were carried out using the practical range of fibre dosages, which provided insight into how the steel fibres can help reduce the amount of conventional shear links.

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“…In the RILEM TC 162-TDF (2002) method, strains corresponding to these stresses were empirically estimated as fixed values. The main shortcoming of the RILEM tensile σ-ε response lies in the accuracy of the procedure used to determine the load at initiation of the crack on a measured load-deflection (P-δ) response, not to mention, the assumptions made for the calculation of the post-cracking strength (Tlemat et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Modeling the Behavior of Steel-Fiber Reinforced Concrete Ground Slabs. I: Development of Material Model

2011

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Steel Fibre Reinforced Concrete (SFRC) brings favourable properties to concrete ground slabs.The use of the material is limited by the lack of an appropriate analysis method. This paper is the first in a series of two regarding research aimed at providing a modelling approach, which can be used to model the behaviour of SFRC concrete and SFRC ground slabs. Here, an improved generalized analytical method is presented to determine the tensile stress-strain (σ-ε) response using an inverse analysis. The tensile σ-ε response is determined using either the experimental moment-curvature (M-φ) or load-deflection (P-δ) responses. The validity of the inverse analysis is evaluated by comparing calculated and measured tensile σ-ε responses. The tensile σ-ε response is subsequently utilized in nonlinear finite element analysis of a SFRC beam with the purpose of examining the tensile σ-ε relationship. The calculated results compare well with the experimental observations.

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Modelling of SFRC using inverse finite element analysis

Cited by 48 publications

References 12 publications

Shear behaviour of steel-fibre-reinforced concrete simply supported beams

Shear behaviour of steel-fibre-reinforced concrete simply supported beams

Statically-Indeterminate SFRC Columns under Cyclic Loads

Modeling the Behavior of Steel-Fiber Reinforced Concrete Ground Slabs. I: Development of Material Model

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