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Assessment of mechanical properties of cold formed steel material at elevated temperature

Fire accident is considered as the one of most severe environmental hazards for buildings and infrastructures. Cold formed steel (CFS) beam has been used extensively as the primary load bearing structural member in many applications in building construction dues to high production, fabrication and a...

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Main Authors:	Muftah, F., Mohd. Sani, M. S. H., Osman, A. R., Razlan, M. A., Mohammad, S.
Format:	Conference or Workshop Item
Published:	Trans Tech Publications Ltd 2016
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/73487/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959881349&doi=10.4028%2fwww.scientific.net%2fMSF.846.27&partnerID=40&md5=d0f90dbf185dc71f6745eead4713270d
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spelling	my.utm.734872017-11-26T03:37:06Z http://eprints.utm.my/id/eprint/73487/ Assessment of mechanical properties of cold formed steel material at elevated temperature Muftah, F. Mohd. Sani, M. S. H. Osman, A. R. Razlan, M. A. Mohammad, S. TA Engineering (General). Civil engineering (General) Fire accident is considered as the one of most severe environmental hazards for buildings and infrastructures. Cold formed steel (CFS) beam has been used extensively as the primary load bearing structural member in many applications in building construction dues to high production, fabrication and assembling efficiencies in construction. Consequently, material used must show a high level structural integrity and stability throughout a long period of time to perform well in fire incident. Hence, assessments of the materials’ properties are crucial in order to predict the performance of the structure during fire incidents; therefore, the tensile coupon tests of CFS are according to BS EN 10002-1:2001 and the G450 CFS material with 1.90 mm thickness was used in this study. The elastic modulus, yield stress, correspondent percentage strain at yield stress, ultimate stress, and correspondent percentage strain of ultimate stress were 200.30 GPa, 540.50 MPa, 0.478%, 618.80 MPa, and 8.701% respectively. Furthermore, the results of the ambient temperature test were used to assess the mechanical strength of CFS at the elevated temperatures. The discussion of material properties is based on EC3-1-2 and proposed models from other researches, while the main material properties discussed are the stress-strain curve, elastic modulus and yield strength at elevated temperatures was determined. It was found that the actual elastic region was slightly lower than the predicted EC3-1.2 at ambient temperature, but it was well fit with two other studies. Besides that, the actual material properties experienced a strain hardening after yielding and reached a maximum stress of up to 618 MPa while the predicted EC3-1.2 constant value of the yield stress after yield was until 15.0% of the strain, meanwhile, other two studies had fitted the ambient tensile test up to the ultimate stress which fitted until 2.0% strain level. Trans Tech Publications Ltd 2016 Conference or Workshop Item PeerReviewed Muftah, F. and Mohd. Sani, M. S. H. and Osman, A. R. and Razlan, M. A. and Mohammad, S. (2016) Assessment of mechanical properties of cold formed steel material at elevated temperature. In: 28th Regional Conference on Solid State Science and Technology, RCSSST 2014, 25-27 Nov 2014, Pahang, Malaysia. https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959881349&doi=10.4028%2fwww.scientific.net%2fMSF.846.27&partnerID=40&md5=d0f90dbf185dc71f6745eead4713270d
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Muftah, F. Mohd. Sani, M. S. H. Osman, A. R. Razlan, M. A. Mohammad, S. Assessment of mechanical properties of cold formed steel material at elevated temperature
description	Fire accident is considered as the one of most severe environmental hazards for buildings and infrastructures. Cold formed steel (CFS) beam has been used extensively as the primary load bearing structural member in many applications in building construction dues to high production, fabrication and assembling efficiencies in construction. Consequently, material used must show a high level structural integrity and stability throughout a long period of time to perform well in fire incident. Hence, assessments of the materials’ properties are crucial in order to predict the performance of the structure during fire incidents; therefore, the tensile coupon tests of CFS are according to BS EN 10002-1:2001 and the G450 CFS material with 1.90 mm thickness was used in this study. The elastic modulus, yield stress, correspondent percentage strain at yield stress, ultimate stress, and correspondent percentage strain of ultimate stress were 200.30 GPa, 540.50 MPa, 0.478%, 618.80 MPa, and 8.701% respectively. Furthermore, the results of the ambient temperature test were used to assess the mechanical strength of CFS at the elevated temperatures. The discussion of material properties is based on EC3-1-2 and proposed models from other researches, while the main material properties discussed are the stress-strain curve, elastic modulus and yield strength at elevated temperatures was determined. It was found that the actual elastic region was slightly lower than the predicted EC3-1.2 at ambient temperature, but it was well fit with two other studies. Besides that, the actual material properties experienced a strain hardening after yielding and reached a maximum stress of up to 618 MPa while the predicted EC3-1.2 constant value of the yield stress after yield was until 15.0% of the strain, meanwhile, other two studies had fitted the ambient tensile test up to the ultimate stress which fitted until 2.0% strain level.
format	Conference or Workshop Item
author	Muftah, F. Mohd. Sani, M. S. H. Osman, A. R. Razlan, M. A. Mohammad, S.
author_facet	Muftah, F. Mohd. Sani, M. S. H. Osman, A. R. Razlan, M. A. Mohammad, S.
author_sort	Muftah, F.
title	Assessment of mechanical properties of cold formed steel material at elevated temperature
title_short	Assessment of mechanical properties of cold formed steel material at elevated temperature
title_full	Assessment of mechanical properties of cold formed steel material at elevated temperature
title_fullStr	Assessment of mechanical properties of cold formed steel material at elevated temperature
title_full_unstemmed	Assessment of mechanical properties of cold formed steel material at elevated temperature
title_sort	assessment of mechanical properties of cold formed steel material at elevated temperature
publisher	Trans Tech Publications Ltd
publishDate	2016
url	http://eprints.utm.my/id/eprint/73487/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959881349&doi=10.4028%2fwww.scientific.net%2fMSF.846.27&partnerID=40&md5=d0f90dbf185dc71f6745eead4713270d
_version_	1643656673986871296
score	13.211869

Assessment of mechanical properties of cold formed steel material at elevated temperature

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