Journal article
Effects of shear on the lateral torsional buckling of singly-symmetric I-beams
Thin-walled structures, v 203, 112174
01 Oct 2024
Abstract
This paper presents an investigation on the negative effects of shear on the lateral torsional buckling (LTB) of singly-symmetric I-shaped beams due to web distortion associated with shear. Results from a parametric FEA study including eigenvalue buckling analyses and large-displacement analyses were utilized considering both stiffened and unstiffened webs to consider the impact of shear on the LTB resistance. Moment gradients caused by constant shear and a shear gradient were considered. The FEA solutions demonstrate that shear can significantly reduce the lateral-torsional buckling resistance. The FEA results were used to develop design equations that account for the reduction in the LTB capacity from shear. The solutions were compared with conventional methods proposed by Winter to account for the effects of web distortion on girders with slender webs. Results from the study show that (i) the average flange area should be used to account for the effects of shear of singlysymmetric beams; (ii) post-buckling strength has limited impact on the shear effects with regards to the LTB resistance; and, (iii) compared to Winter's approach, the proposed method can capture the variation of the moment reduction factor with the shear force in the unbraced length, and is able to predict moment resistances with reasonable accuracy compared to refined FEA solutions using both eigenvalue analysis and largedisplacement analysis. Design examples are provided to demonstrate the calculation procedure.
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Details
- Title
- Effects of shear on the lateral torsional buckling of singly-symmetric I-beams
- Creators
- Chen Liang - Tongji UniversityZhihua Xiong - Northwest A&F UniversityTodd A. Helwig - Univ Texas Austin, Austin, TX 78712 USAMatthew C. Reichenbach - Drexel UniversityZhenhua Pan - Northwest A&F University
- Publication Details
- Thin-walled structures, v 203, 112174
- Publisher
- Elsevier
- Number of pages
- 15
- Grant note
- 202206305001 / China Scholarship Council 52308193 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:001265975400001
- Scopus ID
- 2-s2.0-85197397590
- Other Identifier
- 991021958695604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Civil
- Engineering, Mechanical
- Mechanics