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Design of Mono-symmetric LiteSteel Beam Floor Joists with Web Openings

Seo, Jung Kwan & Mahendran, Mahen (2009) Design of Mono-symmetric LiteSteel Beam Floor Joists with Web Openings. In The 5th International Symposium on Steel Structures, 12-14 March 2009, Hotel Prima, Seoul.

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Abstract

The new cold-formed LiteSteel beam (LSB) sections have found increasing popularity in residential, industrial and commercial buildings due to their lightweight and cost-effectiveness. They have the beneficial characteristics of including torsionally rigid rectangular flanges combined with economical fabrication processes. Currently there is significant interest in using LSB sections as flexural members in floor joist systems. When used as floor joists, the LSB sections require holes in the web to provide access for inspection and various services. But there are no design methods that provide accurate predictions of the moment capacities of LSBs with web holes. In this study, the buckling and ultimate strength behaviour of LSB flexural members with web holes was investigated in detail by using a detailed parametric study based on finite element analyses with an aim to develop appropriate design rules and recommendations for the safe design of LSB floor joists. Moment capacity curves were obtained using finite element analyses including all the significant behavioural effects affecting their ultimate member capacity. The parametric study produced the required moment capacity curves of LSB section with a range of web hole combinations and spans. A suitable design method for predicting the ultimate moment capacity of LSB with web holes was finally developed. This paper presents the details of this investigation and the results

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ID Code: 30285
Item Type: Conference Paper
Keywords: Cold-formed steel structures, LiteSteel Beam (LSB, Web opening, Nonlinear finite element analysis
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2009 Please consult the authors.
Deposited On: 08 Feb 2010 15:15
Last Modified: 01 Mar 2012 00:06

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