Direct analysis of steel structures allowing for imperfections and without assumption of effective length

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

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Abstract

The recent codes for design of steel structures like the Eurocode-3 (2005) and The Code of Practice for Structural Uses of Steel Hong Kong (2005) have been based on a new approach of analyzing and designing a steel structure, especially when it is slender. This type of direct analysis, named in the LFRD eliminates the need of assuming an effective length or K-factor for buckling resistance check of columns, which is noted to be arbitrarily taken as the member length by most engineers. This paper details the feature of this code on the use of second-order analysis for design of slender frames which eliminates the need of assuming an effective length for flexural buckling in the design. This alternative new design method in the code was noted to be more reliable and efficient than the present method based on the effective length concept which was found to have limitation in many practical applications. Further, most commercial software is unable to design meeting the code requirement because of use of straight cubic element and does not allow for member and frame imperfections.
Original languageEnglish
Title of host publication5th International Conference on Advances in Steel Structures, ICASS 2007
Pages343-349
Number of pages7
Volume3
Publication statusPublished - 1 Dec 2007
Event5th International Conference on Advances in Steel Structures, ICASS 2007 - Singapore, Singapore
Duration: 5 Dec 20077 Dec 2007

Conference

Conference5th International Conference on Advances in Steel Structures, ICASS 2007
Country/TerritorySingapore
CitySingapore
Period5/12/077/12/07

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Metals and Alloys

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