Flexural Capacity of a New Composite Beam with Concrete-Infilled Tubular Lower Flange

Cho, Bong-Ho; Lee, Jae Sub; Kim, Young Ho; Kim, Dae‐Jin

doi:10.3390/app7010057

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…Ju et al (2007) developed a composite slim floor beam that enhances the flexural capacity by utilizing dowel bars passing through the web of the beam section (Hechler et al, 2013). Cho et al (2017) proposed a type of steel concrete composite beam in which the lower flange has a tubular shape with infilled concrete and derived its flexural strength estimate equations. In addition, Huo and D’Mello (2017) focused on the transmission of shear force between the concrete and steel shapes, and geometric factors were considered to obtain accurate results (Yu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Ultimate flexural strength analysis of composite slim floor beam

Xia

Han

Zhou

et al. 2021

Advances in Structural Engineering

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This paper presents a new type of composite slim floor beam, determined by combining the results of an experimental study and theoretical analysis of the ultimate flexural strength of slim floor beams. The shear connectors play a significant role in the mechanical properties of this type of composite slim floor beam, because the precast concrete slab is laid on the bottom flange of the steel section and because the upper portion of the steel beam is encased in the cast-in-place concrete slab. To investigate the ultimate flexural strength, three specimens, which included headed studs, transverse steel bar shear connectors and no shear connectors, were tested. Additionally, a detailed numerical analysis was performed to verify the experimental results, which indicated that a higher-strength steel beam and thicker concrete slab can effectively enhance the stiffness and flexural capacity of the composite slim floor beam. Based on plastic mechanics and limit analysis theory, a calculation method was derived to estimate the ultimate flexural strength of a composite slim floor beam, and a comparison between the calculation and experimental results shows that the theoretical results exhibit good agreement with the experimental results, and the proposed analysis method can be used in future studies to gain a better understanding of the ultimate flexural strength of composite slim floor beams.

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Section: Introductionmentioning

confidence: 99%

Ultimate flexural strength analysis of composite slim floor beam

Xia

Han

Zhou

et al. 2021

Advances in Structural Engineering

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“…Kim and Sause et al [6][7][8] studied the lateraltorsional buckling performance of tubular flange composite beams by carrying out flexural experiments and finite element analysis. Cho [9] investigated the flexural resistance of monosymmetric tubular flange composite beams by two-point loading tests on seven specimens. Theoretical equations to estimate the flexural strength of new type composite beams were presented, and their accuracy was examined by comparing the predictions of the equations with the test results.…”

Section: Introductionmentioning

confidence: 99%

Lateral-Torsional Buckling Analysis for Doubly Symmetric Tubular Flange Composite Beams with Lateral Bracing under Concentrated Load

Liu

Zhang

et al. 2021

Symmetry

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Tubular flange composite beams are increasingly applied in modern bridge structures. In order to investigate the overall stability behavior of doubly symmetric tubular flange composite beams with lateral bracing under concentrated load, the analysis of elastic lateral-torsional buckling is conducted by the energy variation method. The analytical solution of critical moment of doubly symmetric tubular flange composite beams with lateral bracing is obtained. Meanwhile, the simplified calculation formula of critical moment is fitted by 1stOpt software based on 26,000 groups of data, and the accuracy is verified by the finite element method. It is found that, the critical moment rises obviously with increasing lateral bracing stiffness, and adding lateral bracing to doubly symmetric tubular flange composite beams is beneficial to improve the overall stability in engineering practice. Finally, the influence of several parameters including concrete strength, span, steel ratio of flange and height-thickness ratio of web are studied. The results show that the concrete strength and the web height-thickness ratio have a weak influence on critical moment of elastic lateral-torsional buckling, while the influence of span-depth ratio and flange steel ratio is very significant.

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Flexural Capacity of a New Composite Beam with Concrete-Infilled Tubular Lower Flange

Cited by 2 publications

References 9 publications

Ultimate flexural strength analysis of composite slim floor beam

Ultimate flexural strength analysis of composite slim floor beam

Lateral-Torsional Buckling Analysis for Doubly Symmetric Tubular Flange Composite Beams with Lateral Bracing under Concentrated Load

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