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Article: Minimum deformability design of high-strength concrete beams in non-seismic regions

TitleMinimum deformability design of high-strength concrete beams in non-seismic regions
Authors
KeywordsAbsolute minimum
Beams
Curvature
Design codes
High strength concretes
Issue Date2011
PublisherTechno-Press. The Journal's web site is located at http://technopress.kaist.ac.kr/?journal=cac&subpage=6
Citation
Computers and Concrete, 2011, v. 8 n. 4, p. 445-463 How to Cite?
AbstractIn the design of reinforced concrete (RC) beams, apart from providing adequate strength, it is also necessary to provide a minimum deformability even for beams not located in seismic regions. In most RC design codes, this is achieved by restricting the maximum tension steel ratio or neutral axis depth. However, this empirical deemed-to-satisfy method, which was developed based on beams made of normal-strength concrete (NSC) and normal-strength steel (NSS), would not provide a consistent deformability to beams made of high-strength concrete (HSC) and/or high-strength steel (HSS). More critically, HSC beams would have much lower deformability than that provided previously to NSC beams. To ensure that a consistent deformability is provided to all RC beams, it is proposed herein to set an absolute minimum rotation capacity to all RC beams in the design. Based on this requirement, the respective maximum limits of tension steel ratio and neutral axis depth for different concrete and steel yield strengths are derived based on a formula developed by the authors. Finally for incorporation into design codes, simplified guidelines for designing RC beams having the proposed minimum deformability are developed.
Persistent Identifierhttp://hdl.handle.net/10722/137255
ISSN
2015 Impact Factor: 0.849
2015 SCImago Journal Rankings: 0.506
References

 

DC FieldValueLanguage
dc.contributor.authorHo, JCMen_HK
dc.contributor.authorZhou, KJHen_HK
dc.date.accessioned2011-08-26T14:21:48Z-
dc.date.available2011-08-26T14:21:48Z-
dc.date.issued2011en_HK
dc.identifier.citationComputers and Concrete, 2011, v. 8 n. 4, p. 445-463en_HK
dc.identifier.issn1598-8198en_HK
dc.identifier.urihttp://hdl.handle.net/10722/137255-
dc.description.abstractIn the design of reinforced concrete (RC) beams, apart from providing adequate strength, it is also necessary to provide a minimum deformability even for beams not located in seismic regions. In most RC design codes, this is achieved by restricting the maximum tension steel ratio or neutral axis depth. However, this empirical deemed-to-satisfy method, which was developed based on beams made of normal-strength concrete (NSC) and normal-strength steel (NSS), would not provide a consistent deformability to beams made of high-strength concrete (HSC) and/or high-strength steel (HSS). More critically, HSC beams would have much lower deformability than that provided previously to NSC beams. To ensure that a consistent deformability is provided to all RC beams, it is proposed herein to set an absolute minimum rotation capacity to all RC beams in the design. Based on this requirement, the respective maximum limits of tension steel ratio and neutral axis depth for different concrete and steel yield strengths are derived based on a formula developed by the authors. Finally for incorporation into design codes, simplified guidelines for designing RC beams having the proposed minimum deformability are developed.en_HK
dc.languageengen_US
dc.publisherTechno-Press. The Journal's web site is located at http://technopress.kaist.ac.kr/?journal=cac&subpage=6en_HK
dc.relation.ispartofComputers and Concreteen_HK
dc.subjectAbsolute minimumen_HK
dc.subjectBeamsen_HK
dc.subjectCurvatureen_HK
dc.subjectDesign codesen_HK
dc.subjectHigh strength concretesen_HK
dc.titleMinimum deformability design of high-strength concrete beams in non-seismic regionsen_HK
dc.typeArticleen_HK
dc.identifier.emailHo, JCM: jcmho1@hkucc.hku.hken_HK
dc.identifier.authorityHo, JCM=rp00070en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-80955126830en_HK
dc.identifier.hkuros191310en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80955126830&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume8en_HK
dc.identifier.issue4en_HK
dc.identifier.spage445en_HK
dc.identifier.epage463en_HK
dc.publisher.placeKorea, Republic ofen_HK
dc.identifier.scopusauthoridHo, JCM=24831880500en_HK
dc.identifier.scopusauthoridZhou, KJH=37073984000en_HK

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