Lateral confinement needed to suppress softening of concrete in compression

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dc.authoridCaner, Ferhun/0000-0002-6448-0942
dc.contributor.authorCaner, FC
dc.contributor.authorBazant, ZP
dc.date.accessioned2024-09-18T20:11:41Z
dc.date.available2024-09-18T20:11:41Z
dc.date.issued2002
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractSuppression of softening in the load-deflection diagram of concrete-filled tubular columns and spiral columns is proposed to serve as a design criterion helping to avoid the size effect and explosive brittle character of collapse. To this end, the recently developed tube-squash tests, in which a short concrete-filled steel tube is squashed to about a half of its original length and allowed to bulge, are conducted with tubes of different wall thicknesses. A finite-strain finite element computer code with a microplane constitutive model is used to simulate the tests. After its verification and calibration by tests, the code is used to analyze nonbuckling concrete-filled tubular columns and spirally reinforced columns. It is found that softening in the load-deflection diagram can be fully suppressed only if the reinforcement ratio (ratio of the tube volume or spiral volume to the total volume of column) exceeds about 14%. If mild softening is allowed, the reinforcement ratio must still exceed about 8%. These ratios are surprisingly high. If they are not used in design, one needs to pay attention to the localization of softening damage, accept the (deterministic) size effect engendered by it, and ensure safety margins appropriate for protecting against sudden explosive brittle collapse. This is of particular concern for the design of very large columns.en_US
dc.identifier.doi10.1061/(ASCE)0733-9399(2002)128:12(1304)
dc.identifier.endpage1313en_US
dc.identifier.issn0733-9399
dc.identifier.issn1943-7889
dc.identifier.issue12en_US
dc.identifier.scopus2-s2.0-18744413577en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1304en_US
dc.identifier.urihttps://doi.org/10.1061/(ASCE)0733-9399(2002)128:12(1304)
dc.identifier.urihttps://hdl.handle.net/20.500.12483/9019
dc.identifier.volume128en_US
dc.identifier.wosWOS:000179528800009en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAsce-Amer Soc Civil Engineersen_US
dc.relation.ispartofJournal of Engineering Mechanicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectcompressionen_US
dc.subjectconcreteen_US
dc.subjectsofteningen_US
dc.subjectcollapseen_US
dc.titleLateral confinement needed to suppress softening of concrete in compressionen_US
dc.typeArticleen_US

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