Assessment of lateral distortional buckling resistance in welded I-beams

Rossi, Alexandre; Ferreira, Felipe Piana Vendramell; Martins, Carlos Humberto; Júnior, Enio Carlos Mesacasa

doi:10.1016/j.jcsr.2019.105924

Cited by 42 publications

(12 citation statements)

References 41 publications

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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%

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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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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%

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

et al. 2021

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“…Steel. For steel elements (box girders, reinforcement bars and headed shear studs), a perfect elastoplastic stress-strain relationship was adopted (Ferreira, Rossi and Martins, 2019;Rossi et al, 2020c;Rossi et al, 2020d). Concrete.…”

Section: Boundary Conditionsmentioning

confidence: 99%

Numerical assessment of effective width in steel-concrete composite box girder bridges

Nicoletti

Rossi

Souza

et al. 2020

Advances in Structural Engineering

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The present paper aims to determine numerically in the Abaqus® software the parameters that have the greatest influence on the effective width of steel-concrete composite box girder bridges. In the technical standards and in the literature, there is no specific recommendation for calculating the effective width in steel-concrete composite box girder bridge. As an alternative, the existing recommendations for steel-concrete composite I-girders are adopted. Therefore, in the absence of standards recommendations for steel-concrete composite box girder bridges, there is a need for an investigation into the distribution of stresses at the steel-concrete interface, because if the effective width was admitted incorrectly, may result in costly or even unsafe solutions. For this purpose, the effective numerical width of 160 models of steel-concrete composite box girder bridges was determined, in which the study variables were the configuration of the transversal section, the slab height, the span length and the elements arrangement in the cross section. After analyzing the results, it was proposed a recommendation to determine effective width of steel-concrete composite box girder bridges.

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“…The instability of I-beam without lateral support could be classified as local (web or flange local buckling) and global (Lateral torsional buckling (LTB)) failure modes. The LTB occurs to the slender beam that loses its stability in the main bending plane, presenting lateral displacements with additional twisting (Rossi et al, 2020). The LTB of timber beam (Burow HBM and Janowiak, 2006; Hu et al, 2018; Xiao et., 2017) and steel I-beam (Ozbasaran et al, 2015; Sorf and Jandera, 2020; Rossi et al, 2020) have been widely investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The LTB occurs to the slender beam that loses its stability in the main bending plane, presenting lateral displacements with additional twisting (Rossi et al, 2020). The LTB of timber beam (Burow HBM and Janowiak, 2006; Hu et al, 2018; Xiao et., 2017) and steel I-beam (Ozbasaran et al, 2015; Sorf and Jandera, 2020; Rossi et al, 2020) have been widely investigated. H-shaped steel beams in timber structures are often connected with floors and cladding through mechanical shear connectors.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on the lateral torsional buckling of full-scale steel-timber composite beams

Gao

Meng

et al. 2021

Advances in Structural Engineering

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The lateral torsional buckling (LTB) of steel-timber composite (STC) beam with partial interaction was investigated in this paper. The composite beam is constructed by connecting the timber to both flanges of the H-shaped steel with bolts or screws. Twelve push-out specimens were designed to evaluate the shear performance of bolt or screw connectors. It was shown that the slip stiffness and the shear bearing capacity of the connectors increased with the thickness of timber increasing. Then, eight full-scale composite beams with lengths of 6000 mm were studied through bending tests and compared to a bare steel beam. The experimental behaviors of the specimens were identified, including the failure mode, load-deflection relationship and load-strain response. The LTB phenomenon and composite action were discussed by analyzing the strain distribution, stiffness and strength. The results demonstrated that the STC beams fastened with bolts or screws displayed partial composite action. Although the stiffness of the composite beam showed little augmentation, the maximum strength of the composite beam substantially increased by suppressing the LTB phenomenon. A finite element analysis was conducted to reveal the failure mechanism of the specimens with different geometric and physical parameters, including the number of timber layers, the interface shear stiffness and the initial imperfection. It was found that increasing the number of timber layers in the upper flange suppressed the lateral torsional buckling, and the interface shear stiffness was the key factor to control the stiffness and failure modes of STC beams.

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Assessment of lateral distortional buckling resistance in welded I-beams

Cited by 42 publications

References 41 publications

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

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

Numerical assessment of effective width in steel-concrete composite box girder bridges

Experimental and numerical study on the lateral torsional buckling of full-scale steel-timber composite beams

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