Mechanical properties of structural steels at high temperatures and after cooling down

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Outinen, Jyri
dc.date.accessioned 2012-02-24T08:15:31Z
dc.date.available 2012-02-24T08:15:31Z
dc.date.issued 2007-04-20
dc.identifier.isbn 978-951-22-8608-9
dc.identifier.issn 1456-4327
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/2857
dc.description.abstract Behaviour of mechanical properties of different steel grades at elevated temperatures need to be well known to understand the behaviour of steel and composite structures in fire. Quite commonly simplified material models are used to estimate the structural fire resistance of steel structures. In more advanced methods, for example in finite element or finite strip analyses, it is important to use accurate material data to obtain reliable results. To study thoroughly the behaviour of certain steel structure at elevated temperatures, one should use the material data of the steel obtained by testing. Extensive experimental research has been carried out in the Laboratory of Steel Structures at Helsinki University of Technology in order to investigate mechanical properties of several structural steels at elevated temperatures by using mainly the transient state tensile test method. In this thesis a collection of test results of the behaviour of mechanical properties of different steel grades at elevated temperatures is presented with analysis of the test results. The tests have been carried out at Helsinki University of Technology during the past about 12 years. The aim of these tests has been to evaluate the accuracy of existing design values for the mechanical properties of structural steel and to support other different research projects aimed at studying the behaviour of steel or composite structures in fire. The results are presented with a comparison to the European design standard (EN1993-1-2) for structural fire design of steel structures, which is already the officially accepted standard in the EU countries and certainly will be largely in use in the near future. The results are quite well adopted and referred in other different research projects. The main aim of this research was to provide results to other researchers and design engineers in the field of structural fire engineering to improve structural fire safety in the future. en
dc.description.abstract Teräsrakenteiden paloteknisessä mitoituksessa tarvitaan yksityiskohtaista tietoa materiaalien käyttäytymisestä korkeissa lämpötiloissa. Rakennusten paloturvallisuuden kannalta on olennaista, että tulipalon aiheuttaman lämpötilan nousun aiheuttamat muutokset materiaalien ja rakenteiden kestävyyteen tunnetaan sekä palonaikaisen kestävyyden että korjausrakentamisen kannalta myös tulipalon jälkeisen tilanteen osalta. Kokeellinen materiaalitutkimus on varmin tapa arvioida näitä ominaisuuksia. Teknillisen korkeakoulun Teräsrakennetekniikan laboratoriossa on vuosina 1993-2006 tehty laajaa kokeellista tutkimusta erilaisten rakenneterästen ja ruostumattomien terästen ominaisuuksien selvittämiseksi palolämpötiloissa. Kokeelliset tutkimukset on tehty käyttäen ns. transienttikoemenetelmää, jossa materiaalin käyttäytyminen vastaa hyvin rakennemateriaalin käyttäytymistä tulipalotilanteessa. Lisäksi on tutkittu myös teräksen jäännöslujuutta jäähtymisen jälkeen, jotta voitaisiin arvioida kantavien teräsrakenteiden kestävyyttä myös tulipalon jälkeen. Tässä väitöskirjatutkimuksessa tuotetaan kootusti perustavaa tietoa rakenneteräksen käyttäytymisestä korkeissa lämpötiloissa. Tavoitteena on ollut suunnittelussa ja myös palo-onnettomuuksien arvioinnissa käytettävän perustietämyksen lisääminen, jotta luottamusta rakenteelliseen paloturvallisuuteen voitaisiin parantaa. fi
dc.format.extent 37, [90]
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Helsinki University of Technology en
dc.publisher Teknillinen korkeakoulu fi
dc.relation.ispartofseries Helsinki University of Technology Laboratory of Steel Structures publications en
dc.relation.ispartofseries Teknillisen korkeakoulun teräsrakennetekniikan laboratorion julkaisuja fi
dc.relation.ispartofseries 32 en
dc.relation.haspart Outinen J., Kesti J., Mäkeläinen P., Fire design model for structural steel S355 based upon transient state tensile test results, Journal of Constructional Steel Research, Vol. 42, No. 3, pp. 161-169, Elsevier Science Ltd, 2/1997. [article1.pdf] © 1997 Elsevier Science. By permission.
dc.relation.haspart Mäkeläinen P., Outinen J., Kesti J., Fire design model for structural steel S420M based upon transient-state tensile test results, Journal of Constructional Steel Research, Vol. 48, No. 1, pp. 47-57, Elsevier Science Ltd, 8/1998. [article2.pdf] © 1998 Elsevier Science. By permission.
dc.relation.haspart Mäkeläinen P., Outinen J., Mechanical properties of an austenitic stainless steel at elevated temperatures, Journal of Constructional Steel Research, Vol. 46, Nos. 1-3, pp. 455, Elsevier Science Ltd, 2/1998. Full paper published in the Proceedings of the Second World Conference on Steel Construction, San Sebastián, Spain, 1998. [article3.pdf] © 1998 Elsevier Science. By permission.
dc.relation.haspart Outinen J., Kaitila O., Mäkeläinen P., A study for the development of the design of steel structures in fire conditions, Proceedings of the 1st International Workshop on Structures in Fire, Copenhagen, Denmark, 2000, pp. 267-281. [article4.pdf] © 2000 by authors.
dc.relation.haspart Outinen J., Mäkeläinen P., Effect of high temperature on mechanical properties of cold-formed structural steel, Puthli R., Herion S. (editors), Tubular Structures IX, Proceedings of the Ninth International Symposium and Euroconference on Tubular Structures, Düsseldorf, Germany, 3-5 April 2001, A.A. Balkema Publishers, The Netherlands, 2001, pp. 439-444.
dc.relation.haspart Outinen J., Mäkeläinen P., High-temperature strength of structural steel and residual strength after cooling down, M. Ivanyi (editor), Proceedings of the International Colloquium on Stability and Ductility of Steel Structures, Budapest, Hungary, 2002, Budapest University of Technology and Economics, pp. 751-760.
dc.relation.haspart Outinen J., Mäkeläinen P., Mechanical properties of structural steel at elevated temperatures and after cooling down, Fire and Materials, Vol. 28, Nos. 2-4, pp. 237-251, John Wiley & Sons, 2004.
dc.relation.haspart Outinen J., Mechanical properties of structural steel at elevated temperatures and after cooling down, Proceedings of the 10th International Fire and Materials Conference, San Francisco, USA, 29-31 January 2007, Interscience Communications Limited, 2007, Delegates handbook, pp. 125-126, full article in included CD. [article8.pdf] © 2007 Interscience Communications. By permission.
dc.subject.other Civil engineering en
dc.title Mechanical properties of structural steels at high temperatures and after cooling down en
dc.type G5 Artikkeliväitöskirja fi
dc.description.version reviewed en
dc.contributor.department Department of Civil and Environmental Engineering en
dc.contributor.department Rakennus- ja ympäristötekniikan osasto fi
dc.subject.keyword fire en
dc.subject.keyword steel structures en
dc.subject.keyword material testing en
dc.subject.keyword high-temperature testing en
dc.subject.keyword transient state en
dc.subject.keyword mechanical properties en
dc.subject.keyword elevated temperatures en
dc.identifier.urn urn:nbn:fi:tkk-009152
dc.type.dcmitype text en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.type.ontasot Doctoral dissertation (article-based) en
dc.contributor.lab Laboratory of Steel Structures en
dc.contributor.lab Teräsrakennetekniikan laboratorio fi


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