Flexural behaviour of composite beams with high strength steel

Ban, Huiyong; Bradford, Mark A.

doi:10.1016/j.engstruct.2013.06.040

Cited by 60 publications

(26 citation statements)

References 38 publications

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“…An idealised tri-linear stress-strain relationship is assumed to model the steel material in the FE model, as shown in Figure 3. The strain at the onset of strain hardening e st and the strain at the ultimate tensile stress e u are taken as 0.025 and 0.2, respectively (Ban and Bradford, 2013). In order to consider the effects of the decreased section during the tensile test, the stresstrain curves included in the FE model are converted into true stress-strain relationships.…”

Section: Fe Modelling Of Cftfgsmentioning

confidence: 99%

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Design and analysis of concrete-filled tubular flange girders under combined loading

Al-Dujele

Cashell

2021

Advances in Structural Engineering

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This paper is concerned with the behaviour of concrete-filled tubular flange girders (CFTFGs) under the combination of bending and tensile axial force. CFTFG is a relatively new structural solution comprising a steel beam in which the compression flange plate is replaced with a concrete-filled hollow section to create an efficient and effective load-carrying solution. These members have very high torsional stiffness and lateral torsional buckling strength in comparison with conventional steel I-girders of similar depth, width and steel weight and are there-fore capable of carrying very heavy loads over long spans. Current design codes do not explicitly include guidance for the design of these members, which are asymmetric in nature under the combined effects of tension and bending. The current paper presents a numerical study into the behaviour of CFTFGs under the combined effects of positive bending and axial tension. The study includes different loading combinations and the associated failure modes are identified and discussed. To facilitate this study, a finite element (FE) model is developed using the ABAQUS software which is capable of capturing both the geometric and material nonlinearities of the behaviour. Based on the results of finite element analysis, the moment–axial force interaction relationship is presented and a simplified equation is proposed for the design of CFTFGs under combined bending and tensile axial force.

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Section: Fe Modelling Of Cftfgsmentioning

confidence: 99%

“…The geometry and loading conditions are symmetrical about the mid-span and therefore only half the girder length is explicitly modelled, and appropriate Ban and Bradford, 2013).…”

Section: Support and Loading Conditionsmentioning

confidence: 99%

Design and analysis of concrete-filled tubular flange girders under combined loading

Al-Dujele

Cashell

2021

Advances in Structural Engineering

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“…The key values used in the model are presented in Table 2. The strain at the onset of strain hardening εst and the strain at the ultimate tensile stress εu are taken as 0.025 and 0.2, respectively [36]. The engineering stress-strain (σeng-εeng) curve is converted to true stress-strain (σtrue-εtrue) curve for the ABAQUS model using Eqs (19) and 20, respectively.…”

Section: Steelmentioning

confidence: 99%

Flexural behaviour of concrete filled tubular flange girders

Al-Dujele

Cashell

Afshan

2018

Journal of Constructional Steel Research

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In this paper, the behaviour of concrete filled tubular flange girders (CFTFGs) is investigated through both numerical and analytical modelling. These are new and complex members and their behaviour is governed by a number of interrelated parameters. This work aims to study the relative influence of a number of these variables on the flexural behaviour, particularly for CFTFGs with stiffened webs. A nonlinear three-dimensional finite element (FE) model is developed in the ABAQUS software and is validated using available experimental data. The validated model is then employed to conduct parametric studies and investigate the influence of the most salient parameters. For comparison purposes, and to observe the effect of the concrete infill, steel tubular flange girders (STFGs) with a hollow flange are also studied. The finite element models consider the effects of initial geometric imperfections, as well as other geometrical and material nonlinearities, on the response. In addition, simplified analytical expressions for the flexural capacity are proposed, and the results are compared to those from the FE analyses. It is found that CFTFGs and STFGs with the same dimensions have similar buckling shapes but different buckling loads, with the CFTFG offering greater buckling resistance. This highlights the influence of the concrete infill which increases the stiffness of the upper flange, and hence allows the member to carry additional bending moments compared to STFGs. The proposed analytical expressions, which are suitable for design, are also shown to be capable of providing an accurate depiction of the behaviour and bending moment capacity.

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“…The numerical response of the RC slabs was affected by certain parameters (AFRP layer, trinitrotoluene (TNT), etc.). Ban and Bradford [ 39 ] investigated the flexural behavior of a hybrid beam reinforced with a steel profile and constructed a three-dimensional model using the finite element method. Zheng et al [ 40 ] compared the experimental results and numerical outputs of concrete bridge deck structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Shear Interface Response of Hybrid Thin CFRP–Concrete Slabs

2021

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Hybrid slabs made of carbon-fiber-reinforced polymer (CFRP) and concrete provide a solution that takes advantage of the strength properties of both materials. The performance of the system strongly depends on the CFRP–concrete interaction. This study investigates the shear behavior in the interface of the two materials. Eight full-scale experiments were carried out to characterize the interface shear response of these hybrid elements using different connection solutions. An untreated surface is compared to a surface with aggregates, with a novel system comprising a flexible, straight glass fiber mesh and an inclined glass fiber mesh. The experimental results show that the fabric connection improves the friction between materials and is responsible for the pseudo-plastic performance of the specimens. The inclined mesh produces a more uniform tightening effect compared to the straight mesh. In simulations via the finite element method, we used an adjusted frictional model to reproduce the experiments.

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Flexural behaviour of composite beams with high strength steel

Cited by 60 publications

References 38 publications

Design and analysis of concrete-filled tubular flange girders under combined loading

Design and analysis of concrete-filled tubular flange girders under combined loading

Flexural behaviour of concrete filled tubular flange girders

Experimental and Numerical Study of Shear Interface Response of Hybrid Thin CFRP–Concrete Slabs

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