5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

Ninth International Conference on Advances in Steel Structures (ICASS 2018)


EXPERIMENTAL INVESTIGATION ON COLD-FORMED HIGH STRENGTH STEEL TUBULAR T-JOINTS

 

Yancheng CAI 1, Tak-Ming CHAN 2 and Ben YOUNG 1*

1 Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China

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2 Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China

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DOI:10.18057/ICASS2018.P.007

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).

Keywords:

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

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IMPORTANT DATES

First call for paper:
1 January 2018
Abstract submission: (CLOSED)
1 April 2018
Notification of abstract acceptance:
on or before 16 April 2018 
Full paper submission: 
15 July 2018
Online Registration Begins:
1 August 2018
Notification of full paper acceptance:
31 August 2018
Early bird registration:
on or before 7 September 2018
Online Registration Closes:
31 October 2018
Announcement of programme:
1 November 2018
ICASS2018 December 05, 2018 08:00 AM