Experimental investigation on cold-formed high strength steel tubular T-joints

Yancheng Cai, Tak Ming Chan, Ben Young

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

Abstract

This paper presents an experimental investigation on cold-formed high strength steel tubular T-joints. The fabricated joints included the braces and chords made up of circular hollow sections with nominal yield strength of 1100 MPa. A total of 12 T-joints was tested under axial compression through the braces without any preload in chords. The measured ratio of brace diameter to chord diameter (β) ranged from 0.65 to 1.02, while the measured ratio of brace thickness to chord thickness (τ) and that of chord diameter to chord thickness (2γ) varied from 0.66 to 1.01 and from 22.72 to 34.32, respectively. All the test specimens were failed in chord face failure (chord plastification). The test strengths and deformations of the tubular T-joints are presented in this paper. The test strengths were compared with the nominal strengths calculated from the design rules of Comité International pour le Développement et l´Etude de la Construction Tubulaire (CIDECT) and European Code EN 1993-1-8 (EC3-1.8). The applicability of these design guidelines for cold-formed high strength steel tubular T-joints with nominal yield strength of 1100 MPa was assessed. It is shown that the nominal strengths predicted by CIDECT and EC3-1.8 are unconservative for the cold-formed high strength steel T-joints under axial compression. Generally, it is found that the test strengths divided by chord yield strength and the square of chord thickness had a linear relationship with the values of the square of ratio of brace diameter to chord diameter (β2).

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
CountryChina
CityHong Kong
Period5/12/187/12/18

Keywords

  • Cold-formed steel
  • Experimental investigation
  • High strength steel
  • Welded joints

ASJC Scopus subject areas

  • Metals and Alloys
  • Civil and Structural Engineering

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