Elastic buckling load of continuous braced h-shaped beams with fork restraint

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In Japan, most of H-shaped beams are rigidly connected to the box sectional columns which have high torsional rigidity, and the boundary condition is corresponding to warping fixed support. Our previous papers clarified that the lateral buckling load of beams with the warping restraint becomes higher than that with pinned support. Furthermore, it was shown that the continuous braces such as roof purlins or concrete slabs connected to the beams also prevent the lateral buckling deformation. This paper evaluates the restraint effect of continuous braces on the lateral buckling load for H-shaped beams with fork restraint under the uniform flexural moment. The lateral buckling load of beams with warping and fully fixed supports is estimated by formulating energy conservation equations. Next, this paper derives the equations of elastic lateral buckling load of beams with fork restraint, which is corresponding to the rotational restraint between warping and fully fixed supports by torsional resistance of column. By comparing the equations with the numerical analyses results, the restraint effect of the continuous braces and column on the lateral buckling is verified. It is shown that the lateral buckling stress becomes higher, as the rigidity of the continuous braces or fork restraint increases.

Original languageEnglish
Title of host publicationICSCEA 2019 - Proceedings of the International Conference on Sustainable Civil Engineering and Architecture
EditorsJ.N. Reddy, Chien Ming Wang, Van Hai Luong, Anh Tuan Le
PublisherSpringer
Pages269-277
Number of pages9
ISBN (Print)9789811551437
DOIs
Publication statusPublished - 2020
EventInternational Conference on Sustainable Civil Engineering and Architecture, ICSCEA 2019 - Ho Chi Minh City, Viet Nam
Duration: 2019 Oct 242019 Oct 26

Publication series

NameLecture Notes in Civil Engineering
Volume80
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

ConferenceInternational Conference on Sustainable Civil Engineering and Architecture, ICSCEA 2019
CountryViet Nam
CityHo Chi Minh City
Period19/10/2419/10/26

Keywords

  • Continuous braces
  • Fork restraint
  • Lateral bucking load
  • Uniform flexural moment

ASJC Scopus subject areas

  • Civil and Structural Engineering

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