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Article: Design of high strength steel columns at elevated temperatures

TitleDesign of high strength steel columns at elevated temperatures
Authors
KeywordsColumns
Elevated temperatures
Finite element method
Fire resistant design
High strength steel
Issue Date2008
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jcsr
Citation
Journal Of Constructional Steel Research, 2008, v. 64 n. 6, p. 689-703 How to Cite?
AbstractThe main objective of this paper is to study the behaviour and design of high strength steel columns at elevated temperatures using finite element analysis. In this study, equations predicting the yield strength and elastic modulus of high strength steel and mild steel at elevated temperatures are proposed. In addition, stress-strain curve model for high strength steel and mild steel materials at elevated temperatures is also proposed. The numerical analysis was performed on high strength steel columns over a range of column lengths for various temperatures. The nonlinear finite element model was verified against experimental results of columns at normal room and elevated temperatures. The effects of initial local and overall geometrical imperfections have been taken into consideration in the analysis. The material properties and stress-strain curves at elevated temperatures used in the finite element model were obtained from the proposed equations based on the material tests. Two series of box and I-section columns were studied using the finite element analysis to investigate the strength and behaviour of high strength steel columns at elevated temperatures. Both fixed-ended stub columns and pin-ended slender columns were considered. The column strengths predicted from the finite element analysis were compared with the design strengths predicted using the American, European and Australian specifications for hot-rolled steel columns at elevated temperatures by substituting the reduced material properties. In addition, the direct strength method, which was developed for the design of cold-formed steel columns at normal room temperature, was also used in this study to predict the high strength steel column strengths at elevated temperatures. The suitability of these design rules for high strength steel columns at elevated temperatures is assessed. Generally, it is shown that the American and European specifications as well as the direct strength method conservatively predicted the column strengths of high strength steel at elevated temperatures. The European Code predictions are slightly more conservative than the American Specification and the direct strength method predictions. © 2007 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/70576
ISSN
2015 Impact Factor: 1.702
2015 SCImago Journal Rankings: 1.746
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChen, Jen_HK
dc.contributor.authorYoung, Ben_HK
dc.date.accessioned2010-09-06T06:24:13Z-
dc.date.available2010-09-06T06:24:13Z-
dc.date.issued2008en_HK
dc.identifier.citationJournal Of Constructional Steel Research, 2008, v. 64 n. 6, p. 689-703en_HK
dc.identifier.issn0143-974Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/70576-
dc.description.abstractThe main objective of this paper is to study the behaviour and design of high strength steel columns at elevated temperatures using finite element analysis. In this study, equations predicting the yield strength and elastic modulus of high strength steel and mild steel at elevated temperatures are proposed. In addition, stress-strain curve model for high strength steel and mild steel materials at elevated temperatures is also proposed. The numerical analysis was performed on high strength steel columns over a range of column lengths for various temperatures. The nonlinear finite element model was verified against experimental results of columns at normal room and elevated temperatures. The effects of initial local and overall geometrical imperfections have been taken into consideration in the analysis. The material properties and stress-strain curves at elevated temperatures used in the finite element model were obtained from the proposed equations based on the material tests. Two series of box and I-section columns were studied using the finite element analysis to investigate the strength and behaviour of high strength steel columns at elevated temperatures. Both fixed-ended stub columns and pin-ended slender columns were considered. The column strengths predicted from the finite element analysis were compared with the design strengths predicted using the American, European and Australian specifications for hot-rolled steel columns at elevated temperatures by substituting the reduced material properties. In addition, the direct strength method, which was developed for the design of cold-formed steel columns at normal room temperature, was also used in this study to predict the high strength steel column strengths at elevated temperatures. The suitability of these design rules for high strength steel columns at elevated temperatures is assessed. Generally, it is shown that the American and European specifications as well as the direct strength method conservatively predicted the column strengths of high strength steel at elevated temperatures. The European Code predictions are slightly more conservative than the American Specification and the direct strength method predictions. © 2007 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jcsren_HK
dc.relation.ispartofJournal of Constructional Steel Researchen_HK
dc.rightsJournal of Constructional Steel Research. Copyright © Elsevier Ltd.en_HK
dc.subjectColumnsen_HK
dc.subjectElevated temperaturesen_HK
dc.subjectFinite element methoden_HK
dc.subjectFire resistant designen_HK
dc.subjectHigh strength steelen_HK
dc.titleDesign of high strength steel columns at elevated temperaturesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0143-974X&volume=64&spage=689&epage=703&date=2008&atitle=Design+of+High+Strength+Steel+Columns+at+Elevated+Temperaturesen_HK
dc.identifier.emailYoung, B:young@hku.hken_HK
dc.identifier.authorityYoung, B=rp00208en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jcsr.2007.09.004en_HK
dc.identifier.scopuseid_2-s2.0-41549093176en_HK
dc.identifier.hkuros149262en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-41549093176&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume64en_HK
dc.identifier.issue6en_HK
dc.identifier.spage689en_HK
dc.identifier.epage703en_HK
dc.identifier.isiWOS:000255768400008-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridChen, J=7501901977en_HK
dc.identifier.scopusauthoridYoung, B=7402192398en_HK

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