Critical initial geometric imperfection and advanced beam column element for direct analysis method of tapered I-sections

Rui Bai, Si Wei Liu, Lei Zhao, Siu Lai Chan

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

Abstract

For highly geometrically nonlinear problems, the structural characterizes including the effects of member initial imperfections, the interactions between adjacent members and the buckling can hardly be captured with the linear analysis approach. The prevalent design methods, which are usually developed based on empirical assumptions, cannot correctly reflect the second-order effects of tapered members. Therefore, to accurately simulate the tapered members, this paper proposed an advanced analysis method for tapered I sections based on the direct analysis method. The function representing the critical initial geometric imperfection shape of tapered columns is presented, and the unfavorable effect is incorporated in the advanced tapered beam-column element formulation derived in this paper. The tapered element with an arbitrarily located internal hinge including 12 independent degrees of freedom is introduced for the state-of-the-art design method. Examples verifying the accuracy and efficiency of the proposed formulation are presented. The current research is believed to be a great contribution to the modern design of non-prismatic members.

Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Advances in Steel Structures, ICASS 2018
EditorsSiu Lai Chan, Tak-Ming Chan, Songye Zhu
PublisherHong Kong Institution of Steel Construction
ISBN (Electronic)9889914093, 9789889914097
DOIs
Publication statusPublished - Dec 2018
Event9th International Conference on Advances in Steel Structures, ICASS 2018 - Hong Kong, China
Duration: 5 Dec 20187 Dec 2018

Publication series

NameProceedings of the 9th International Conference on Advances in Steel Structures, ICASS 2018

Conference

Conference9th International Conference on Advances in Steel Structures, ICASS 2018
Country/TerritoryChina
CityHong Kong
Period5/12/187/12/18

Keywords

  • Beam-column element
  • Direct analysis method
  • Initial geometric imperfection
  • Tapered members

ASJC Scopus subject areas

  • Metals and Alloys
  • Civil and Structural Engineering

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