Lateral-torsional buckling of discretely-braced I-girder

H. E. Lee; C. T. Nguyen; J. H. Moon; H. S. Joo

doi:10.1016/j.proeng.2011.07.032

Lateral-torsional buckling of discretely-braced I-girder

H. E. Lee, C. T. Nguyen, J. H. Moon, H. S. Joo

School of Civil, Environmental and Architectural Engineering

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

This paper presents an analytical solution for lateral-torsional buckling strength and stiffness requirements of I-girders with discrete torsional bracings subjected to non-uniform bending. The critical moment and torsional stiffness requirement are derived by using an energy method for an arbitrary number of bracing points. An equivalent moment factor is introduced to evaluate buckling moments of fully braced I-girders. From the results, it is found that proposed solutions agree well with results of finite element analyses regardless of the number of bracing points, while results for the equivalent continuous brace stiffness concept are not suitable for multiple discrete torsionally-braced beams.

Original language	English
Pages (from-to)	264-271
Number of pages	8
Journal	Procedia Engineering
Volume	14
DOIs	https://doi.org/10.1016/j.proeng.2011.07.032
Publication status	Published - 2011
Event	12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12 - Hong Kong, Hong Kong Duration: 2011 Jan 26 → 2011 Jan 28

Keywords

Energy method
Lateral-torsional buckling
Stiffness requirement
Torsional bracing

ASJC Scopus subject areas

Engineering(all)

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10.1016/j.proeng.2011.07.032

Cite this

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title = "Lateral-torsional buckling of discretely-braced I-girder",

abstract = "This paper presents an analytical solution for lateral-torsional buckling strength and stiffness requirements of I-girders with discrete torsional bracings subjected to non-uniform bending. The critical moment and torsional stiffness requirement are derived by using an energy method for an arbitrary number of bracing points. An equivalent moment factor is introduced to evaluate buckling moments of fully braced I-girders. From the results, it is found that proposed solutions agree well with results of finite element analyses regardless of the number of bracing points, while results for the equivalent continuous brace stiffness concept are not suitable for multiple discrete torsionally-braced beams.",

keywords = "Energy method, Lateral-torsional buckling, Stiffness requirement, Torsional bracing",

author = "Lee, {H. E.} and Nguyen, {C. T.} and Moon, {J. H.} and Joo, {H. S.}",

note = "Funding Information: The authors wish to express their sincere thanks to POSCO for the funding needed to pursue this research.; 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12 ; Conference date: 26-01-2011 Through 28-01-2011",

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doi = "10.1016/j.proeng.2011.07.032",

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volume = "14",

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journal = "Procedia Engineering",

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TY - JOUR

T1 - Lateral-torsional buckling of discretely-braced I-girder

AU - Lee, H. E.

AU - Nguyen, C. T.

AU - Moon, J. H.

AU - Joo, H. S.

N1 - Funding Information: The authors wish to express their sincere thanks to POSCO for the funding needed to pursue this research.

PY - 2011

Y1 - 2011

N2 - This paper presents an analytical solution for lateral-torsional buckling strength and stiffness requirements of I-girders with discrete torsional bracings subjected to non-uniform bending. The critical moment and torsional stiffness requirement are derived by using an energy method for an arbitrary number of bracing points. An equivalent moment factor is introduced to evaluate buckling moments of fully braced I-girders. From the results, it is found that proposed solutions agree well with results of finite element analyses regardless of the number of bracing points, while results for the equivalent continuous brace stiffness concept are not suitable for multiple discrete torsionally-braced beams.

AB - This paper presents an analytical solution for lateral-torsional buckling strength and stiffness requirements of I-girders with discrete torsional bracings subjected to non-uniform bending. The critical moment and torsional stiffness requirement are derived by using an energy method for an arbitrary number of bracing points. An equivalent moment factor is introduced to evaluate buckling moments of fully braced I-girders. From the results, it is found that proposed solutions agree well with results of finite element analyses regardless of the number of bracing points, while results for the equivalent continuous brace stiffness concept are not suitable for multiple discrete torsionally-braced beams.

KW - Energy method

KW - Lateral-torsional buckling

KW - Stiffness requirement

KW - Torsional bracing

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U2 - 10.1016/j.proeng.2011.07.032

DO - 10.1016/j.proeng.2011.07.032

M3 - Conference article

AN - SCOPUS:80054787548

VL - 14

SP - 264

EP - 271

JO - Procedia Engineering

JF - Procedia Engineering

SN - 1877-7058

T2 - 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12

Y2 - 26 January 2011 through 28 January 2011

ER -

Lateral-torsional buckling of discretely-braced I-girder

Abstract

Keywords

ASJC Scopus subject areas

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