Imperial College London
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ProfessorLeroyGardner

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Structural Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6058leroy.gardner

 
 
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Location

 

435Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Lapira:2023:10.1016/j.tws.2022.110150,
author = {Lapira, L and Gardner, L and Wadee, MA},
doi = {10.1016/j.tws.2022.110150},
journal = {Thin Walled Structures},
title = {Elastic local buckling formulae for thin-walled I-sections subjected to shear and direct stresses},
url = {http://dx.doi.org/10.1016/j.tws.2022.110150},
volume = {182},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Formulae for calculating the elastic local buckling stresses of doubly-symmetric thin-walled I-section girders subjected to combined shear and direct stresses, accounting for the interaction between the plate elements are presented. The interaction between the plate elements (i.e. the flanges and web) is bounded by a theoretical lower-bound, where there is no interaction and the critical plate is considered to be simply-supported, and a theoretical upper-bound where interaction is strongest and the critical plate is considered to have rotationally fixed edges. The interaction is accounted for by introducing an interaction coefficient ζ that quantifies the relative level of fixity between the aforementioned lower and upper bounds. Expressions to calculate ζ are calibrated using results from finite element analyses generated in Abaqus. Doubly-symmetric I-sections of varying geometric proportions loaded in shear, major axis bending, compression and a full range of combinations thereof are considered. Using the developed formulae, the elastic local buckling stresses of the studied cross-sections are accurately predicted, typically within 5% of the values obtained from FE models; this is a significant improvement over the results determined in the traditional manner in which plate element interaction effects are ignored, where the full cross-section buckling stress is shown to be underestimated by as much as 40%.
AU  - Lapira,L
AU  - Gardner,L
AU  - Wadee,MA
DO  - 10.1016/j.tws.2022.110150
PY  - 2023///
SN  - 0263-8231
TI  - Elastic local buckling formulae for thin-walled I-sections subjected to shear and direct stresses
T2  - Thin Walled Structures
UR  - http://dx.doi.org/10.1016/j.tws.2022.110150
UR  - https://www.sciencedirect.com/science/article/pii/S0263823122007029?via%3Dihub
UR  - http://hdl.handle.net/10044/1/99728
VL  - 182
ER  -
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