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research article

Evaluation of overstrength-based interaction checks for columns in steel moment frames

Falborski, Tomasz
•
Murtas, Greta
•
Elkady, Ahmed
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January 1, 2025
Journal of Constructional Steel Research

A study is presented to examine the implications of this guidance, which disregards the column interaction check (including both axial force and moment) under overstrength seismic loads. A set of thirteen steel moment frames are designed using multiple rules that apply and disregard overstrength, drift, and cross-sectional compactness checks in various combinations. The frames are subjected to a suite of simulations including linear elastic, nonlinear static pushover, nonlinear response history, and continuum finite element simulations that are able to represent a range of physical behavior modes in the columns including interactive nonlinear geometric instabilities that could trigger loss of the load carrying capacity of the member. The simulations indicate no significant distinction between the seismic performance of steel moment resisting frames designed as per current code-based provisions (i.e., disregarding the column interaction check for overstrength seismic loads), and those designed with the use of the interaction check, with each providing acceptable response without failure. The simulations also indicate that design checks for drift and cross-sectional compactness play a significant role ensuring acceptable response, providing additional margin of safety beyond the member strength checks.

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Type
research article
DOI
10.1016/j.jcsr.2024.109123
Scopus ID

2-s2.0-85207942818

Author(s)
Falborski, Tomasz
Murtas, Greta

École Polytechnique Fédérale de Lausanne

Elkady, Ahmed
Lignos, Dimitrios  

École Polytechnique Fédérale de Lausanne

Kanvinde, Amit
Date Issued

2025-01-01

Published in
Journal of Constructional Steel Research
Volume

224

Article Number

109123

Subjects

Continuum finite element analysis

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Design guidelines

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Seismic response

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Seismic stability

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Steel columns

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Steel moment-resisting frames

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
RESSLAB  
Available on Infoscience
January 9, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/242657
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