Behaviour and design of composite beams subjected to flexure and axial load

Kirkland, Brendan; Uy, Brian

doi:10.12989/scs.2015.19.3.615

Cited by 14 publications

(12 citation statements)

References 25 publications

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“…This V/V uo value where the flexural capacity first begins its rapid decline is shown to change in an almost linear manner with increasing axial load similar to the results from quadrant II. Comparison of the experimental and CSA results from Kirkland and Uy [12] and FEM results indicates a good agreement. However, similar to Quadrant I, the experiments were carried out with axial loading imposed on both the steel beam and the concrete slab resulting in a higher N u value than the FEM was able to achieve.…”

Section: Quadrant IV -Hogging Moment and Compressionmentioning

confidence: 63%

“…The moment-axial force interaction validation was completed by plotting the results obtained from relevant simulation runs of the FEM against results produced by Kirkland and Uy [12]. Quadrant I and II simulations were carried out for both PSC and FSC cases as past experiments were conducted using specimens with a degree of shear connection of 0.6 while this study was focused on the behaviour of composite beams with FSC.…”

Section: Assessment Of the Numerical Modelmentioning

confidence: 99%

“…Kirkland and Uy [12] recently proposed equations for the interaction of moment and axial load extending upon the work of Vasdravellis et al [32][33][34][35]. Combining these models for the third dimension first requires knowledge of the effect of axial load on the shear capacity of a member.…”

Section: Design Modelsmentioning

confidence: 99%

“…Each of these studies contains an experimental series, a finite element analysis and design recommendations for the M-N interaction of each respective loading combination. Kirkland and Uy [12] performed a CSA and extended previous research with revised design models for all four combinations of flexure and axial loads as well as the influence of partial interaction. The proposed design models are given below.…”

Section: Introductionmentioning

confidence: 99%

“…The study contained herein is the culmination of a larger research project aimed to determine the effect of axial load on the flexural and shear capacity of composite beams [12,[31][32][33][34][35]. This paper presents the results of a finite element model and proposes design models for the reduction in flexural and shear capacity of a member in the presence of axial load.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Moment–shear–axial force interaction in composite beams

Kirkland

Kim

et al. 2015

Journal of Constructional Steel Research

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Section: Quadrant IV -Hogging Moment and Compressionmentioning

confidence: 63%

Section: Assessment Of the Numerical Modelmentioning

confidence: 99%

Section: Design Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Moment–shear–axial force interaction in composite beams

Kirkland

Kim

et al. 2015

Journal of Constructional Steel Research

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Behaviour of rectangular concrete filled tubular flange girders under combined loading

Al-Dujele¹,

Cashell²

2021

ce papers

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Steel‐concrete composite construction can provide an efficient structural solution by utilizing the two component materials to create a single effective composite section. The high tensile strength and ductility of steel combined with the excellent compressive strength and robustness of concrete results in an effective composite cross‐section which can be used in a wide variety of applications. There are a number of different shapes of composite beam, and this paper is focussed on a relatively new structural solution called concrete filled tubular flange girders (CFTFGs). These comprise a steel beam in which the top flange plate is replaced with a concrete‐filled hollow section. The compression flange can be any shape (e.g. circular, rectangular, and pentagonal) and the focus in the current paper is on simply supported girders with a rectangular section for the compression flange (i.e. RCFTFGs). These members have very high lateral torsional buckling resistance compared with conventional steel I‐girders of similar depth, width and steel weight and are therefore capable of carrying very heavy loads over long spans. However, they are complex to analyse and their behaviour is governed by several inter‐related parameters which are investigated and discussed herein. Given the most common applications of these girders, such as in bridges and carparks for example, they are frequently exposed to a simultaneous combination of high axial loads and bending moments. Although current design codes offer rules for the design of composite columns under combined loading, the design of RCFTFGs, which are asymmetric in nature under the combined effects of tension and bending, are not explicitly included. This work aims to investigate the ultimate strength of RCFTFGs with stiffened webs under the combined effects of various levels of axial tension and positive (sagging) bending moment. Nonlinear three‐dimensional finite element analyses using the ABAQUS computer software package have been developed to facilitate the study. The model is validated using available experimental data and then employed to conduct an extensive parametric study. It is shown that the moment capacity of RCFTFGs is reduced in most situations under the presence of an axial tensile force in the steel beam. In addition, the tensile capacity of the RCFTFGs is limited by the axial capacity of the steel beam alone, with little contribution from the concrete infill. Several influential parameters are examined and conclusions are discussed. Based on the finite element analysis, the moment–axial force interaction relationship is presented and discussed.

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