ORCID Profile
0000-0002-5116-4115
Current Organisation
Northumbria University
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Publisher: Elsevier BV
Date: 2015
Publisher: SAGE Publications
Date: 11-04-2012
Abstract: Recently an innovative composite panel system was developed, where a thin insulation layer was used externally between two plasterboards to improve the fire performance of light gauge cold-formed steel frame walls. In this research, finite-element thermal models of both the traditional light gauge cold-formed steel frame wall panels with cavity insulation and the new light gauge cold-formed steel frame composite wall panels were developed to simulate their thermal behaviour under standard and realistic fire conditions. Suitable apparent thermal properties of gypsum plasterboard, insulation materials and steel were proposed and used. The developed models were then validated by comparing their results with available fire test results. This article presents the details of the developed finite-element models of small-scale non-load-bearing light gauge cold-formed steel frame wall panels and the results of the thermal analysis. It has been shown that accurate finite-element models can be used to simulate the thermal behaviour of small-scale light gauge cold-formed steel frame walls with varying configurations of insulations and plasterboards. The numerical results show that the use of cavity insulation was detrimental to the fire rating of light gauge cold-formed steel frame walls, while the use of external insulation offered superior thermal protection to them. The effects of real fire conditions are also presented.
Publisher: Elsevier BV
Date: 12-2013
Publisher: Elsevier BV
Date: 09-2014
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2016
Publisher: Elsevier BV
Date: 11-2012
Publisher: Elsevier BV
Date: 04-2014
Publisher: SAGE Publications
Date: 02-2012
DOI: 10.1260/1369-4332.15.2.171
Abstract: The LiteSteel Beam (LSB) is a new cold-formed steel hollow flange channel beam recently developed in Australia. It is commonly used as a floor joist or bearer in buildings. Current practice in flooring systems is to include openings in the web element of floor joists or bearers so that building services can be located within them. Shear behaviour of LSBs with web openings is more complicated while their shear strengths are considerably reduced by the presence of web openings. However, no research has been undertaken on the shear behaviour and strength of LSBs with web openings. Therefore a detailed experimental study involving 26 shear tests was undertaken on simply supported LSB test specimens with web openings and an aspect ratio of 1.5. This paper presents the details of this experimental study and the results of their shear capacities and behavioural characteristics. Experimental results showed that the current design rules in cold-formed steel structures design codes are very conservative for the shear design of LSBs with web openings. Improved design equations have been proposed for the shear strength of LSBs with web openings based on the experimental results from this study.
Publisher: Elsevier BV
Date: 06-2011
Publisher: Elsevier BV
Date: 09-2015
Publisher: Springer Science and Business Media LLC
Date: 09-2013
Publisher: Elsevier BV
Date: 06-2016
Publisher: WIT Press
Date: 18-06-2012
DOI: 10.2495/HPSM120321
Publisher: Elsevier BV
Date: 10-2012
Publisher: Elsevier BV
Date: 2013
Publisher: Elsevier BV
Date: 04-2013
Publisher: Elsevier BV
Date: 10-2010
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2011
Publisher: Elsevier BV
Date: 10-2015
Publisher: Elsevier BV
Date: 12-2014
Publisher: Elsevier BV
Date: 11-2016
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2013
Publisher: Elsevier BV
Date: 06-2014
Publisher: Elsevier BV
Date: 08-2015
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2015
Publisher: Emerald
Date: 19-08-2014
DOI: 10.1260/2040-2317.5.3.261
Abstract: Cold-formed Light gauge Steel Frame (LSF) wall systems are increasingly used in low-rise and multi-storey buildings and hence their fire safety has become important in the design of buildings. A composite LSF wall panel system was developed recently, where a thin insulation was sandwiched between two plasterboards to improve the fire performance of LSF walls. Many experimental and numerical studies have been undertaken to investigate the fire performance of non-load bearing LSF wall under standard conditions. However, only limited research has been undertaken to investigate the fire performance of load bearing LSF walls under standard and realistic design fire conditions. Therefore in this research, finite element thermal models of both the conventional load bearing LSF wall panels with cavity insulation and the innovative LSF composite wall panel were developed to simulate their thermal behaviour under standard and realistic design fire conditions. Suitable thermal properties were proposed for plasterboards and insulations based on laboratory tests and available literature. The developed models were then validated by comparing their results with available fire test results of load bearing LSF wall. This paper presents the details of the developed finite element models of load bearing LSF wall panels and the thermal analysis results. It shows that finite element models can be used to simulate the thermal behaviour of load bearing LSF walls with varying configurations of insulations and plasterboards. Failure times of load bearing LSF walls were also predicted based on the results from finite element thermal analyses. Finite element analysis results show that the use of cavity insulation was detrimental to the fire rating of LSF walls while the use of external insulation offered superior thermal protection to them. Effects of realistic design fire conditions are also presented in this paper.
Publisher: SAGE Publications
Date: 06-2016
Abstract: LiteSteel beam is a hollow flange channel made from cold-formed steel using a patented manufacturing process involving simultaneous cold-forming and dual electric resistance welding. LiteSteel beams are currently used as floor joists and bearers in buildings. However, there are no appropriate design standards available due to their unique hollow flange geometry, residual stress characteristics and initial geometric imperfections arising from manufacturing processes. Recent research studies have focused on investigating the structural behaviour of LiteSteel beams under pure bending, predominant shear and combined actions. However, web crippling behaviour and strengths of LiteSteel beams still need to be examined. Therefore, an experimental study was undertaken to investigate the web crippling behaviour and strengths of LiteSteel beams under end-one-flange and interior-one-flange load cases. A total of 23 web crippling tests were performed and the results were compared with the current AS/NZS 4600 and AISI S100 design standards, which showed that the cold-formed steel design rules predicted the web crippling capacity of LiteSteel beam sections very conservatively under end-one-flange and interior-one-flange load cases. Therefore, suitably improved design equations were proposed to determine the web crippling capacity of LiteSteel beams based on experimental results. In addition, new design equations were also developed under the direct strength method format. This article presents the details of this experimental study on the web crippling behaviour and strengths of LiteSteel beams under end-one-flange and interior-one-flange load cases and the results.
Publisher: Springer Science and Business Media LLC
Date: 26-05-2013
Publisher: Elsevier BV
Date: 11-2010
Publisher: Elsevier BV
Date: 10-2016
Location: United Kingdom of Great Britain and Northern Ireland
Start Date: 2012
End Date: 2015
Funder: Australian Research Council
View Funded ActivityStart Date: 2015
End Date: 2018
Funder: Australian Research Council
View Funded ActivityStart Date: 2013
End Date: 2016
Funder: Australian Research Council
View Funded Activity