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  4. A torsional fiber element and a multiaxial softening model to simulate cyclic interactive buckling in wide-flanged steel members
 
research article

A torsional fiber element and a multiaxial softening model to simulate cyclic interactive buckling in wide-flanged steel members

Maity, Arka
•
Kanvinde, Amit
•
Heredia Rosa, Diego I.
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November 1, 2025
Computers and Structures

A three-dimensional frame-element based approach is presented to simulate cyclic inelastic interactions of local and lateral torsional buckling – collectively termed interactive buckling. The approach integrates a multiaxial fiber-based beam-column element termed the torsional fiber element, capable of representing deformation modes characteristic of inelastic warping and St Venant torsion with a multiaxial constitutive model that represents the effective constitutive response associated with cyclic inelastic local buckling. The resulting integrated approach, implemented in the platform OpenSees is applied to 26 beam-column specimens encompassing a range of configurations including section geometry and boundary conditions and loading protocols. The results of the approach are evaluated against counterpart results from physical experiments as well as continuum finite element simulations. It is determined that the presented approach can simulate important aspects of interactive buckling both qualitatively and quantitatively, including deformation modes, as well as cyclic strength and stiffness degradation, while requiring only a fraction of the computational time of the continuum-finite element simulations. Guidelines for calibration and use of the approach are presented. Limitations of the approach are summarized, along with directions for future improvements.

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Type
research article
DOI
10.1016/j.compstruc.2025.107970
Scopus ID

2-s2.0-105017429856

Author(s)
Maity, Arka

College of Engineering

Kanvinde, Amit

College of Engineering

Heredia Rosa, Diego I.

École Polytechnique Fédérale de Lausanne

de Castro e Sousa, Albano  

École Polytechnique Fédérale de Lausanne

Lignos, Dimitrios G.  

École Polytechnique Fédérale de Lausanne

Date Issued

2025-11-01

Published in
Computers and Structures
Volume

318

Article Number

107970

Subjects

Beam-column elements

•

Cyclic response

•

Interactive buckling

•

Lateral torsional buckling

•

Local buckling

•

Stability

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
RESSLAB  
FunderFunding(s)Grant NumberGrant URL

École Polytechnique Fédérale de Lausanne

University of California Davis

US National Science Foundation

CMMI-1926202

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Available on Infoscience
October 8, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/254766
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