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Article: Experimental study of two-way post-tensioned flat slabs in fire

TitleExperimental study of two-way post-tensioned flat slabs in fire
Authors
Zhang, LWei, YAu, FTKLi, J
KeywordsFlat slabs
Prestressed concrete
Spalling
Structural analysis
Temperature effect
Issue Date2018
PublisherEmerald Group Publishing Limited. The Journal's web site is located at http://www.emeraldinsight.com/loi/jsfe
Citation
Journal of Structural Fire Engineering, 2018, v. 9 n. 3, p. 237-251 How to Cite?
DOI: http://dx.doi.org/10.1108/JSFE-01-2017-0016
AbstractThe structural behaviour of two-way post-tensioned concrete flat slabs at elevated temperatures is less understood compared to their one-way counterparts. Fire tests of four scale specimens of two-way posttensioned concrete flat slabs were performed and analysed. Three of them were provided with bonded tendons while the other was unbonded for comparison. The study investigated the influence of tendon layout, prestressing force, bond condition and concrete spalling on their structural behaviour at elevated temperatures. The fabrication of specimens, phenomena observed during testing, temperature distributions, deflections and occurrence of concrete spalling were examined. Different degrees of concrete spalling observed at the soffit had significant effects on the temperature distribution and stress redistribution. This was the major reason for the progressive concrete spalling observed, with loss of structural integrity and stiffness. Based on the experimental results, design recommendations for two-way post-tensioned concrete flat slabs were provided.
Persistent Identifierhttp://hdl.handle.net/10722/247319
ISSN
2040-2317
2020 SCImago Journal Rankings: 0.479
ISI Accession Number ID
WOS:000447009300005

 

DC FieldValueLanguage
dc.contributor.authorZhang, L-
dc.contributor.authorWei, Y-
dc.contributor.authorAu, FTK-
dc.contributor.authorLi, J-
dc.date.accessioned2017-10-18T08:25:31Z-
dc.date.available2017-10-18T08:25:31Z-
dc.date.issued2018-
dc.identifier.citationJournal of Structural Fire Engineering, 2018, v. 9 n. 3, p. 237-251-
dc.identifier.issn2040-2317-
dc.identifier.urihttp://hdl.handle.net/10722/247319-
dc.description.abstractThe structural behaviour of two-way post-tensioned concrete flat slabs at elevated temperatures is less understood compared to their one-way counterparts. Fire tests of four scale specimens of two-way posttensioned concrete flat slabs were performed and analysed. Three of them were provided with bonded tendons while the other was unbonded for comparison. The study investigated the influence of tendon layout, prestressing force, bond condition and concrete spalling on their structural behaviour at elevated temperatures. The fabrication of specimens, phenomena observed during testing, temperature distributions, deflections and occurrence of concrete spalling were examined. Different degrees of concrete spalling observed at the soffit had significant effects on the temperature distribution and stress redistribution. This was the major reason for the progressive concrete spalling observed, with loss of structural integrity and stiffness. Based on the experimental results, design recommendations for two-way post-tensioned concrete flat slabs were provided.-
dc.languageeng-
dc.publisherEmerald Group Publishing Limited. The Journal's web site is located at http://www.emeraldinsight.com/loi/jsfe-
dc.relation.ispartofJournal of Structural Fire Engineering-
dc.rightsThis article is © Emerald Group Publishing and permission has been granted for this version to appear here (please insert the web address here). Emerald does not grant permission for this article to be further copied/distributed or hosted elsewhere without the express permission from Emerald Group Publishing Limited.-
dc.subjectFlat slabs-
dc.subjectPrestressed concrete-
dc.subjectSpalling-
dc.subjectStructural analysis-
dc.subjectTemperature effect-
dc.titleExperimental study of two-way post-tensioned flat slabs in fire-
dc.typeArticle-
dc.identifier.emailAu, FTK: francis.au@hku.hk-
dc.identifier.authorityAu, FTK=rp00083-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1108/JSFE-01-2017-0016-
dc.identifier.scopuseid_2-s2.0-85033598908-
dc.identifier.hkuros281311-
dc.identifier.volume9-
dc.identifier.issue3-
dc.identifier.spage237-
dc.identifier.epage251-
dc.identifier.isiWOS:000447009300005-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl2040-2317-

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