DSM-based design proposal for CFS columns failing in local-distortional interactive modes

André Dias Martins, Dinar Camotim, Pedro Borges Dinis, Ben Young, Man Tai Chen

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This work proposes an efficient and rational approach, based on the Direct Strength Method (DSM), for the design of CFS columns failing in local-distortional (L-D) interactive modes. The development, calibration and validation of this design proposal, which is intended for codification in the near future, is based mostly on available experimental failure load data (i.e., keeping in line with the DSM “tradition”), but benefits also from significant numerical failure load data involving columns with several cross-section shapes (plain, web-stiffened and web-flange-stiffened lipped channels, hat, zed and rack-sections). Three types of L-D interactive failures are covered, namely those due to “true L-D interaction”, “secondary-distortional bifurcation L-D interaction” and “secondary-local bifurcation L-D interaction” – naturally, the current DSM local and distortional strength curves are also linked to the current proposal. The merits (accuracy and safety) and reliability of the proposed DSM-based design approach are assessed the latter following the procedure prescribed by the current North American Specification for the Design of Cold-Formed Steel Structural Members and are also compared with those exhibited by the existing methodologies to design CFS columns against L-D interactive failures.

Original languageEnglish
Title of host publicationStructural Stability Research Council Conference 2022, Held in conjunction with NASCC
Subtitle of host publicationThe Steel Conference
PublisherStructural Stability Research Council (SSRC)
Pages402-424
Number of pages23
ISBN (Electronic)9781713845263
Publication statusPublished - Mar 2022
EventStructural Stability Research Council Conference 2022, Held in conjunction with NASCC: The Steel Conference - Atlanta, United States
Duration: 22 Mar 202225 Mar 2022

Publication series

NameStructural Stability Research Council Conference 2022, Held in conjunction with NASCC: The Steel Conference

Conference

ConferenceStructural Stability Research Council Conference 2022, Held in conjunction with NASCC: The Steel Conference
Country/TerritoryUnited States
CityAtlanta
Period22/03/2225/03/22

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Safety, Risk, Reliability and Quality
  • Building and Construction

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