Investigation on Structural Behaviour of Cold-formed Steel Built-up Columns - Modified Direct Strength Method

Sivaganesh Selvaraj, Mahendrakumar Madhavan

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

Abstract

An investigation of the behavior of cold-formed steel (CFS) built-up I column assemblies are presented. To study the interactive buckling mode of failures, the built-up column assembly failure modes and test results from the literature are collected, totaling 813 data points. The parameters including different shapes dimensions, lengths, spacing between the fastener connections, and slendernesses are investigated. The result shows that the local buckling deformations caused the built-up shape assembly columns to fail predominantly in interactive local and flexural-torsional buckling. The effect of spacing between the fastener connections and boundary conditions is also prevalent in the failure modes. The appropriateness of the AISI’s maximum intermediate connection spacing limitation is verified to prevent instability failures. The design results assessment indicated that the current AISI’s DSM design curve for interactive buckling is unconservative for the CFS built-up columns with predominant interactive local and overall buckling failure mode vulnerability.

Original languageEnglish
Publication statusPublished - 2024
Event2024 Annual Stability Conference Structural Stability Research Council, SSRC 2024 - San Antonio, United States
Duration: 19 Mar 202422 Mar 2024

Conference

Conference2024 Annual Stability Conference Structural Stability Research Council, SSRC 2024
Country/TerritoryUnited States
CitySan Antonio
Period19/03/2422/03/24

ASJC Scopus subject areas

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

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