Assessment of web post buckling resistance in steel-concrete composite cellular beams

Ferreira, Felipe Piana Vendramell; Martins, Carlos Humberto; Nardin, Silvana De

doi:10.1016/j.tws.2020.106969

Cited by 25 publications

(36 citation statements)

References 55 publications

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“…The methods of Lawson [15,30] and Panedpojaman [23] were compared by Zaher et al [36], but only for cellular curved beams. Ferreira et al [37] compared the methods of Lawson [15,30], Panedpojaman [23] and Grilo [35], but only for composite cellular beams with a reinforced concrete slab. The methods were too conservative for composite beams and did not consider the beam-concrete slab cooperation or the influence of the end post width on the WPB resistance.…”

Section: Vierendeel Bending (Vm) and Web-post Buckling (Wpb)mentioning

confidence: 99%

Cellular Beams with Closely Spaced Web Openings – A Review of Analytical Calculation Models for Web-Post Buckling

Saternus¹

2022

Adv. Sci. Technol. Res. J.

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This paper is devoted to cellular beams manufactured by fl ame cutting and welding of hot rolled I-sections. The infl uence of fabrication proces ses on the size of geometric and material imperfections was considered. Static performance was characterised, as were the failure modes, with particular emphasis on the Vierendeel mechanism and web-post buckling. As the literature review shows, a local loss of web post stability is a frequent failure mode of cellular beam with closely spaced web openings. The main objective of this paper is present a summary of research on web post buckling (WPB) in cellular beams in light of the available analytical computational methods for determining WPB resistance based on the analogy to compression member buckling. This paper addresses the need for a clear assessment of the discrepancies between the assumptions and calculation algorithms used in the presented methods, so far lacking in the literature. This paper includes an explanation of the essence of the WPB phenomenon, a summary of the basic assumptions and algorithms used in the available methods, a description of the differences between them, and a critical comparison of these methods. The presented algorithms were unifi ed and adjusted to the nomenclature of PN-EN 1993-1-1. For 7 cellular beams, the analytical column buckling resistance under the action of vertical shear force was determined according to 5 analytical methods implemented in MS Excel. The results were presented in tabular and graphical forms. Signifi cant discrepancies between the results from the diff erent methods were shown and discussed. The assumptions of the methods vary signifi cantly. The largest diff erences between the predicted resistances were observed for narrow posts, while for wider posts, the methods showed better agreement. The lack of clear consensus on the correct design procedure does not encourage designers to optimally design such load-bearing members or may lead to construction disasters. This article indicates the points of disagreement concerning the calculation models used and outlines the direction for further work. A step for future work will be to verify the assumptions of numerical models and establish clear guidelines for designers in the fi eld of analytical calculations.

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Section: Vierendeel Bending (Vm) and Web-post Buckling (Wpb)mentioning

confidence: 99%

Cellular Beams with Closely Spaced Web Openings – A Review of Analytical Calculation Models for Web-Post Buckling

Saternus¹

2022

Adv. Sci. Technol. Res. J.

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“…1. 150 mm of HCU depth with a chamfered end (Figure 1a Geometrical nonlinear analyses were processed using the Static Riks metho method was previously used in [25,[34][35][36][37][38][39][40] and is based on the arc-length method ual stresses were not considered. These stresses do not influence the ultimate stre composite beams subjected to only positive moments.…”

Section: Numerical Model: Validation Studymentioning

confidence: 99%

“…Geometrical nonlinear analyses were processed using the Static Riks method. This method was previously used in [25,[34][35][36][37][38][39][40] and is based on the arc-length method. Residual stresses were not considered.…”

Section: Testsmentioning

confidence: 99%

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Steel-Concrete Composite Beams with Precast Hollow-Core Slabs: A Sustainable Solution

et al. 2021

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Industrialization of construction makes building operation more environmental friendly and sustainable. This change is necessary as it is an industry that demands large consumption of water and energy, as well as being responsible for the disposal of a high volume of waste. However, the transformation of the construction sector is a big challenge worldwide. It is also well known that the largest proportion of the material used in multistory buildings, and thus its carbon impact, is attributed to their slabs being the main contributor of weight. Steel–concrete-composite beams with precast hollow-core slabs (PCHCSs) were developed due to their technical and economic benefits, owing to their high strength and concrete self-weight reduction, making this system economical and with lower environmental footprint, thus reducing carbon emissions. Significant research has been carried out on deep hollow-core slabs due to the need to overcome larger spans that resist high loads. The publication SCI P401, in accordance with Eurocode 4, is however limited to hollow-core slabs with depths from 150 to 250 mm, with or without a concrete topping. This paper aims to investigate hollow-core slabs with a concrete topping to understand their effect on the flexural behavior of steel–concrete-composite beams, considering the hollow-core-slab depth is greater than the SCI P401 recommendation. Consequently, 150 mm and 265 mm hollow-core units with a concrete topping were considered to assess the increase of the hollow core unit depth. A comprehensive computational parametric study was conducted by varying the in situ infill concrete strength, the transverse reinforcement rate, the shear connector spacing, and the cross-section of steel. Both full and partial interaction models were examined, and in some cases similar resistances were obtained, meaning that the same strength can be obtained for a smaller number of shear studs, i.e., less energy consumption, thus a reduction in the embodied energy. The calculation procedure, according to Eurocode 4 was in favor of safety for the partial-interaction hypothesis.

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“…Table 1 shows the imperfection factor (α) values for each buckling curve. Also, the results are compared with the inelastic analyses, previously presented in Ferreira et al [17], and with the calculation of the critical global shear presented in [13,18].…”

Section: Introductionmentioning

confidence: 98%

Buckling and post-buckling analyses of composite cellular beams

Ferreira

Tsavdaridis

Martins

et al. 2021

Composite Structures

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Assessment of web post buckling resistance in steel-concrete composite cellular beams

Cited by 25 publications

References 55 publications

Cellular Beams with Closely Spaced Web Openings – A Review of Analytical Calculation Models for Web-Post Buckling

Cellular Beams with Closely Spaced Web Openings – A Review of Analytical Calculation Models for Web-Post Buckling

Steel-Concrete Composite Beams with Precast Hollow-Core Slabs: A Sustainable Solution

Buckling and post-buckling analyses of composite cellular beams

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