Lateral torsional buckling analysis of moment resisting plane frames

Sahraei, Arash; Mohareb, Magdi

doi:10.1016/j.tws.2018.10.006

Cited by 9 publications

(7 citation statements)

References 49 publications

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“…Concerning the joint element, it is discretised by (shell) finite elements and therefore able to adopt complex geometries, for example including plate stiffeners. The technique presented has some similarity with that reported by Wu & Mohareb [81] and Sahraei & Mohareb [82], which models frame joints using shell elements and the structural members by conventional finite element beam elements. However, unlike the work in [81,82], the present study captures distortional modes.…”

Section: Discussionsupporting

confidence: 71%

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Modelling of steel frames using advanced beam and joint elements with interfaces governed by beam modes

Hansen

Jönsson

2019

Thin-Walled Structures

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For decades, engineers have assessed and analysed steel frames using simple joints between beams and columns. These joints are often based on oversimplified assumptions using hinges or a direct transfer of beam displacements without any relative displacements. More seldom is the use of spring models that allow relative beam and column displacements at the joints. This despite the standardised component method approach, which can be used to determine the rotational spring stiffness of the relative rotation in a joint. This paper gives a background overview of essential developments in joint modelling and generalised thin-walled beam modelling, including torsional, distortional and related warping effects. For particular situations, some recent proposals for joint models can be applied to joints between thin-walled beams. On this basis, this paper presents a novel idea and a generic methodology that allows the interface between an extended number of generalised beam displacement modes and joints that are modelled using shell elements. The main novelty is the idea to transform from standard degrees of freedom of the interface into a reduced number of beam displacement mode related degrees of freedom. Thus, the number of degrees of freedom of the joint can be reduced to the corresponding total sum of beam modes that have been chosen for the modelling of each of the connected beam elements. The total number of degrees of freedom used for modelling the complete framework will depend on the selected number of modes in each beam element and on the number of extra internal modes chosen in the joint models. For enhanced structural analysis with advanced beam elements and joints that allow relevant distortions and built-in refined connection components, it is believed that this methodology will enable the full detailed analysis of large steel frameworks with a reasonable number of degrees of freedom.

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Section: Discussionsupporting

confidence: 71%

“…The technique presented has some similarity with that reported by Wu & Mohareb [81] and Sahraei & Mohareb [82], which models frame joints using shell elements and the structural members by conventional finite element beam elements. However, unlike the work in [81,82], the present study captures distortional modes.…”

Section: Discussionsupporting

confidence: 71%

Modelling of steel frames using advanced beam and joint elements with interfaces governed by beam modes

Hansen

Jönsson

2019

Thin-Walled Structures

View full text Add to dashboard Cite

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“…The shear deformable prismatic Timoshenko beam element referred to as B31OS in Abaqus [31], which allows for the effects of torsion and warping in open-sections, was used [32][33][34].…”

Section: Modelling Approachmentioning

confidence: 99%

Equivalent imperfections for the out-of-plane stability design of steel beams by second-order inelastic analysis

Quan

Walport

Gardner

2022

Engineering Structures

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“…The rotating blade is a plate and shell structure. Although it has many advantages, it is easy to cause vibration, buckling instability and fatigue cracking [2]. Especially for this high-temperature plate and shell structure under a mechanical/thermal load environment, when the structural size and temperature load increases, only static analysis cannot meet the needs of engineering design.…”

Section: Introductionmentioning

confidence: 99%

Study on Linear and Nonlinear Thermal Buckling Mode and Instability Characteristics for Engine Rotating Thin-Walled Blade

Men

Pan

Jiang³

et al. 2022

Applied Sciences

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The thermal shock load has an important effect on the stability of thin-walled blades under high-speed operation of aircraft engines. According to the actual working conditions, the linear interpolation distribution of blade temperature is obtained by the numerical fitting method. A thermal buckling model is built to obtain the linear and nonlinear modal response of the blade through the finite element method. The results show that the blade stiffness changes under the influence of thermal buckling and the obvious torsional deformations are produced along the radial direction of the blade. Meanwhile, the largest deformation of about 1.3 mm and stress of 81 Mpa occurs on the blade tip for both the linear and nonlinear response. The buckling stress distribution and critical load factor of thermal buckling are also calculated, consistent with the rubbing part of blade. The changing radial length is the main reason for the distance reduction between the blade and casing, causing more probability of friction impact. Therefore, reasonable local thermal buckling technology is helpful to improve the design level of thermal-shock loaded blades.

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Lateral torsional buckling analysis of moment resisting plane frames

Cited by 9 publications

References 49 publications

Modelling of steel frames using advanced beam and joint elements with interfaces governed by beam modes

Modelling of steel frames using advanced beam and joint elements with interfaces governed by beam modes

Equivalent imperfections for the out-of-plane stability design of steel beams by second-order inelastic analysis

Study on Linear and Nonlinear Thermal Buckling Mode and Instability Characteristics for Engine Rotating Thin-Walled Blade

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