5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

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


ELECTRO-SLAG WELD FRACTURES IN SEISMIC STEEL 

BEAM-TO-BOX COLUMN MOMENT CONNECTONS

 

Keh-Chyuan Tsai1*, Chao-Hsien Li2, Ching-Yi Tsai2, Chung-Che Wu2

Ker-Chun Lin3 and Sheng-Jhih Jhuang3

1,2 Department of Civil Engineering, National Taiwan University, Taipei, Taiwan

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3 National Center for Research on Earthquake Engineering, Taipei, Taiwan

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DOI:10.18057/ICASS2018.K.09

ABSTRACT:

The results of 22 previous cyclic tests of full-scale steel beam-to-box column (B-to-C) connections show that the electro-slag welding (ESW) diaphragm-to-column joints would have a probability of about 18% to suffer fracture before the adequate plastic rotation is developed in the seismic B-to-C moment connections, even when the special ductile detailing is employed for the connections. The high heat input during the ESW process could result in a limited toughness in the heat affected zone (HAZ) of the ESW joint. In addition, the eccentricity between the elevations of ESW joint and the beam flange could accelerate the ESW premature facture. This study investigates the applicability of two micromechanical-based stress modified critical stress (SMCS) models in predicting the crack initiation fracture of the diaphragm-to-column ESW joint. The comparison between the test and analytical results verify that the SMCS model incorporated with the material toughness parameters obtained from this study can satisfactorily predict the fracture of the ESW diaphragm-to-column joint.

Keywords:

Seismic Beam-To-Box Moment Connection; Electro-Slag Welding; Heat Affected Zone; Fracture Toughness

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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 Time's Up