5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

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


STRENGTH AND DSM DESIGN OF END-BOLTED COLD-FORMED COLUMNS FAILING IN DISTORTIONAL MODES

 

Warlley S. Santos1, Alexandre Landesmann1* and Dinar Camotim2

1 PEC/COPPE/UFRJ, Programa de Eng. Civil, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

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2 CERIS, ICIST, DECivil, Instituto Superior Técnico, Universidade de Lisboa, Portugal

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DOI:10.18057/ICASS2018.P.074

ABSTRACT:

This work reports the results of an experimental investigation concerning the influence of bolted end support conditions on the failure loads of cold-formed steel lipped channel columns buckling and failing in distortional modes, as well as on their prediction by means of the Direct Strength Method (DSM). This type or end support conditions, commonly used in the civil engineering construction market, consists of pairs of high-strength cylindrical bolts with hexagonal heads and nuts, which are inserted in two standard-size holes located at the intersections of the flanges with the centroidal axis parallel to the web. After describing the test set-up and procedure, the experimental failure loads obtained are presented and discussed. These acquired failure load data are subsequently employed to assess the quality of their estimates by means of the currently codified DSM column distortional design curve. Because this assessment leads to the conclusion that the current DSM curve clearly overestimates the experimental failure loads obtained, a new/modified design curve is preliminarily proposed and shown to improve considerably the prediction quality (safety and reliability) of the end-bolted column failure loads, thus providing motivation and encouragement to continue the search for an efficient DSM-based design approach for end-bolted columns failing in distortional modes.

Keywords:

Cold-formed steel lipped channel columns; Bolted end support conditions; Distortional failure; Experimental investigation; Direct Strength Method (DSM) design

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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