Lateral-torsional buckling steel beams with simultaneously tapered flanges and web

Kuś, Juliusz

doi:10.12989/scs.2015.19.4.897

Cited by 17 publications

(3 citation statements)

References 15 publications

(29 reference statements)

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“…However, for the buckling moments, the tapering web section contributes to the lowest effects (Kus, 2015). About 11% difference in values between critical buckling moments for web tapered beam and the prismatic beam was observed.…”

Section: Shape Of Perforation Circlementioning

confidence: 90%

The structural efficiency of tapered steel section with perforation under lateral torsional buckling behaviour

De’nan

Hashim

Kuan

2020

WJE

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Purpose Tapered section can resist maximum stress at a single location while the stresses are considerably lower at the rest of the member; therefore, it could have higher structural efficiency compared to conventional section. It could also satisfy functional requirements while reducing weight and cost in many fields of civil construction. Perforation in the steel section also eases the integration of Mechanical and Electrical (M&E) services such as ventilation pipes and electrical cables within the structural depths of the beam. In this analysis, the structural efficiency of tapered steel section with perforation under lateral-torsional buckling behaviour is investigated. Design/methodology/approach A total of 81 models are analysed using LUSAS software and five variables are investigated which involved perforation sizes, perforation shapes, perforation layout, tapering ratio and flange and Web thickness. Buckling moment is obtained from the analysis results in LUSAS software, while self-weight and structural efficiency are manually calculated. Findings Perforation size of 0.75 D has the highest structural efficiency, although it can withstand a smaller buckling load. This is due to its lower self-weight compared to other perforation sizes. The square perforation shape also has the highest structural efficiency compared to circular perforation and diamond perforation. An increment of percentage in structural efficiency of the square perforation shape with 0.75 D is the highest at 3.07%. The circular perforation shape with 0.75 D (Open-Open-Open perforation layout) has the highest increment of percentage in structural efficiency which is 2.37%. The tapering ratio of 0.3 is the most efficient and an increment of percentage in structural efficiency is 114.36%. The flange thickness of 0.02 m and Web thickness of 0.015 m has the highest structural efficiency at 45.756 and 29.171, respectively. Originality/value In conclusion, a section should be able to resist the large buckling moment and has a lower self-weight to achieve high structural efficiency.

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Section: Shape Of Perforation Circlementioning

confidence: 90%

The structural efficiency of tapered steel section with perforation under lateral torsional buckling behaviour

De’nan

Hashim

Kuan

2020

WJE

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“…The geometric and material nonlinear properties with imperfection effects were also considered during the analyses. Kuś and Maleska [22,23] proposed a procedure using the Rayleigh-Ritz method to calculate a web-tapered I-beam's critical buckling moment with stiffener ribs. Investigation on lateral torsional buckling of simply supported non-prismatic I-beams with axially varying materials properties according to the volume fraction of the constituent materials based on an exponential or a power law function by a novel finite element formulation and tapered thin-walled beams with singly-symmetric crosssection with arbitrary boundary conditions using finite difference method can be found by Soltani et al [24,25].…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Study of the Elastic and Inelastic Resistance to Lateral Torsional Buckling of Steel Semi-Compact I-Sections

Abuteir,

Labed

2023

Numerical Methods in Civil Engineering

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This paper uses a parametric numerical study to assess the Lateral-torsional buckling (LTB) performance of several semi-compact beams: S1, S2, and S3. The carrying capacity of these beams, predominantly loaded in bending, is approached by elastic and inelastic buckling analyses. A series of parameters that are believed to influence the resistance to LTB of class 3 beams to (EC3) steel I-beams, namely boundary conditions, flange thickness, and load application level, are investigated. An eigenvalue analysis that predicts the theoretical buckling strength through 3D computational elastic beam models is first conducted using LTBEAM software and ABAQUS. A good agreement in the prediction of Mcr was found. Then, a parametric inelastic buckling analysis is performed using the Riks method implanted in ABAQUS. Results have shown the importance of the lateral restraint conditions and the transverse stiffeners to LTB resistance of compressive flange slenderness following EC3-1-1 for cross sections with a class 3 web and class 1 or 2 flange. In addition, an interaction of local buckling (LB) and LTB in the flanges was observed exclusively for restrained beams. The applied load level strongly affects the beams' elastic and inelastic resistance to LTB.

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“…Among tapered member applications, a novel beam finite element was introduced by Mohri et al [ 52 ], together with a large torsion assumption, to estimate the stability resistance of tapered thin-walled beams. A semi-analytical procedure based on the Ritz technique was employed by Kuś [ 53 ] for analyzing the lateral stability of linearly tapered-web and/or flange doubly-symmetric I-beams. A finite element-based solution was proposed by Pandeya and Singhb [ 54 ] to survey the free vibrational behavior of a fixed–free nanobeam with a varying cross-section.…”

Section: Introductionmentioning

confidence: 99%

Nonlocal Analysis of the Flexural–Torsional Stability for FG Tapered Thin-Walled Beam-Columns

et al. 2021

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This paper addresses the flexural–torsional stability of functionally graded (FG) nonlocal thin-walled beam-columns with a tapered I-section. The material composition is assumed to vary continuously in the longitudinal direction based on a power-law distribution. Possible small-scale effects are included within the formulation according to the Eringen nonlocal elasticity assumptions. The stability equations of the problem and the associated boundary conditions are derived based on the Vlasov thin-walled beam theory and energy method, accounting for the coupled interaction between axial and bending forces. The coupled equilibrium equations are solved numerically by means of the differential quadrature method (DQM) to determine the flexural–torsional buckling loads associated to the selected structural system. A parametric study is performed to check for the influence of some meaningful input parameters, such as the power-law index, the nonlocal parameter, the axial load eccentricity, the mode number and the tapering ratio, on the flexural–torsional buckling load of tapered thin-walled FG nanobeam-columns, whose results could be used as valid benchmarks for further computational validations of similar nanosystems.

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Lateral-torsional buckling steel beams with simultaneously tapered flanges and web

Cited by 17 publications

References 15 publications

The structural efficiency of tapered steel section with perforation under lateral torsional buckling behaviour

The structural efficiency of tapered steel section with perforation under lateral torsional buckling behaviour

Study of the Elastic and Inelastic Resistance to Lateral Torsional Buckling of Steel Semi-Compact I-Sections

Nonlocal Analysis of the Flexural–Torsional Stability for FG Tapered Thin-Walled Beam-Columns

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