Shear performance of lightweight concrete filled hollow flange cold-formed steel beams

Sifan, Mohamed; Gatheeshgar, Perampalam; Nagaratnam, Brabha; Poologanathan, Keerthan; Navaratnam, Satheeskumar; Thamboo, Julian; Corradi, Marco

doi:10.1016/j.cscm.2022.e01160

Cited by 2 publications

(1 citation statement)

References 45 publications

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“…[2] predicts the moment resistance of the composite beam; the CFS box section was composed of two channel sections embedded in the concrete, in accordance with Eurocode 4 [9]. A CFS with hollow flanges was investigated in [10], wherein the hollow flanges of an I section were filled with normal and high-strength lightweight concrete. The results show that a lightweight infill, whether it is lightweight, normal, or lightweight high-strength concrete, positively affects the shear capacity because it delays shear buckling.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Bending Resistance of Lightweight Built-Up Steel-Concrete Composite Beams

et al. 2023

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This paper investigates the bending resistance of an innovative lightweight composite floor system, LWT-FLOOR. The system consists of built-up cold-formed steel elements that are spot-welded and connected to the concrete slab using demountable shear connectors. As the system under investigation is new, the existing standards do not provide guidelines for calculating its bending resistance. This paper gives an overview of different analytical approaches and a comparison of calculated results using bending capacities from the numerical parametric study. Within the numerical parametric study, the influence of the height of the steel beam, the type and degree of shear connection, the connection between the steel elements, and the thickness of the corrugated web used for the bending capacity are investigated. Numerical results for the full shear connections resulted in lower bending capacities than the analytically calculated plastic bending resistances. However, numerically obtained bending capacities for partial shear connections were found to exceed the calculated characteristic non-linear bending resistances and bending resistances for partial shear connections. The obtained results will comprise the basis for further experimental tests, which will support the search for an optimal analytical approach for the bending resistance of the proposed composite system.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on the Bending Resistance of Lightweight Built-Up Steel-Concrete Composite Beams

et al. 2023

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Flexural performance of T-shape light-weight concrete filled steel tubular girder

El-Kherbawy,

Morsy,

Abdel-Ghaffar

et al. 2023

J. Eng. Appl. Sci.

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This paper proposes an optimization study for both structure and materials to obtain an affordable, long-span, light-weight, and fast-constructing T-shape lightweight concrete-filled steel tubular (LWCFST) girder in order to be used in bridge construction. This research was performed on a hollow steel tube of Steel-52 (yield limit 360 MPa), which was filled with LWC. A set of parameters had been investigated to illustrate its effect on T-shape LWCFST girder stiffness, toughness, resilience, and ultimate carrying load capacity in order to obtain an equivalent stiffness to that of the typically used precast concrete girder. Based on design codes (EN 1994-1-1/Euro code 4 and ANSI/AISC 360-10) that permit the use of LWC as a filler material, the parameters considered were: the thickness of the steel tube, compressive strength of the filler concrete, and the bond condition between the steel tube and filler lightweight concrete. The yielding and ultimate bending capacity were determined based on the interpreted failure criteria of T-shape LWCFST girder, considering non-linear analysis for both material and loads using ANSYSWORKBENCH software. The results showed that T-shape LWCFST girder can be employed as a significant relative economic alternative to a typical precast girder in the bridge construction field, thanks to its high stiffness/weight ratio. The lightweight concrete inside was effectively employed to delay the local web buckling of the steel tube to increase its bending capacity. In addition, it reduced the total self-weight of the bridge’s superstructure by 20% compared with a typical precast concrete girder. The dominant failure of T-shape LWCFST girders was found in the upper concrete slab due to the compression stress, even though the tensile cracks in the filler concrete occurred after reaching tensile yield stress in the steel tube. Additionally, increasing the value of friction coefficient between steel tube and lightweight concrete up to 0.8 was found to significantly affect the girder stiffness and has a slight effect after, no matter how high it is.

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Shear performance of lightweight concrete filled hollow flange cold-formed steel beams

Cited by 2 publications

References 45 publications

Numerical Study on the Bending Resistance of Lightweight Built-Up Steel-Concrete Composite Beams

Numerical Study on the Bending Resistance of Lightweight Built-Up Steel-Concrete Composite Beams

Flexural performance of T-shape light-weight concrete filled steel tubular girder

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