Improved line-element formulations for the stability analysis of arbitrarily-shaped open-section beam-columns

Si Wei Liu; Wen Long Gao; Ronald D. Ziemian

doi:10.1016/j.tws.2019.106290

Improved line-element formulations for the stability analysis of arbitrarily-shaped open-section beam-columns

Si Wei Liu, Wen Long Gao, Ronald D. Ziemian

Research output: Journal article publication › Journal article › Academic research › peer-review

30 Citations (Scopus)

Abstract

Open-sections are often used in structural applications because of their material efficiency in providing members of high strength and stiffness. Although previous research has made significant progress in accounting for the effects when the shear-center and centroid are not coincident for such sections, the compression buckling strengths of non-symmetric sections, for example unequal-leg angles, are sometimes over- or under-predicted unless their principal axes’ properties are properly defined. This paper improves existing beam-column line-element formulations for accurately simulating the axial buckling behavior of arbitrarily-shaped open-sections. Detailed derivations are given and implemented within the educational software MASTAN2. Several verification examples are provided.

Original language	English
Article number	106290
Journal	Thin-Walled Structures
Volume	144
DOIs	https://doi.org/10.1016/j.tws.2019.106290
Publication status	Published - Nov 2019
Externally published	Yes

Keywords

Buckling
Finite-element method
Open-sections
Second-order analysis
Wagner effects
Warping

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Mechanical Engineering

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10.1016/j.tws.2019.106290

Cite this

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abstract = "Open-sections are often used in structural applications because of their material efficiency in providing members of high strength and stiffness. Although previous research has made significant progress in accounting for the effects when the shear-center and centroid are not coincident for such sections, the compression buckling strengths of non-symmetric sections, for example unequal-leg angles, are sometimes over- or under-predicted unless their principal axes{\textquoteright} properties are properly defined. This paper improves existing beam-column line-element formulations for accurately simulating the axial buckling behavior of arbitrarily-shaped open-sections. Detailed derivations are given and implemented within the educational software MASTAN2. Several verification examples are provided.",

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AB - Open-sections are often used in structural applications because of their material efficiency in providing members of high strength and stiffness. Although previous research has made significant progress in accounting for the effects when the shear-center and centroid are not coincident for such sections, the compression buckling strengths of non-symmetric sections, for example unequal-leg angles, are sometimes over- or under-predicted unless their principal axes’ properties are properly defined. This paper improves existing beam-column line-element formulations for accurately simulating the axial buckling behavior of arbitrarily-shaped open-sections. Detailed derivations are given and implemented within the educational software MASTAN2. Several verification examples are provided.

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KW - Warping

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Improved line-element formulations for the stability analysis of arbitrarily-shaped open-section beam-columns

Abstract

Keywords

ASJC Scopus subject areas

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