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Article: Limited deformability design of high-strength concrete beams in low to moderate seismicity regions

TitleLimited deformability design of high-strength concrete beams in low to moderate seismicity regions
Authors
KeywordsBeams
Confinement
Curvature
Deformability
Design formulas
High-strength concrete
High-strength steel
Low-moderate seismicity
Reinforced concrete
Rotation capacity
Issue Date2011
Citation
Journal Of Civil Engineering And Management, 2011, v. 17 n. 3, p. 409-423 How to Cite?
AbstractIn the design of reinforced concrete (RC) beams located in low-moderate seismicity regions, adequate flexural deformability apart from flexural strength to cater for the imposed seismic demand should be designed. As per the existing RC design codes, this is achieved by restricting the maximum neutral axis depth or tension steel ratio, or limiting the minimum confining steel. However, these deemed-to-satisfy rules were derived many years ago based on normal-strength concrete and steel, which would impair the deformability when applied directly to RC beams made of high-strength materials. To resolve the problem, a new design method based on a prescribed deformability is advocated. In this study, the authors proposed that instead of complying with the deemed-to-satisfy rules, a consistent deformability derived based on the design requirements of Eurocode 2 should be provided to all RC beams located in low-moderate seismicity regions. Using the theoretical formulas developed previously by the authors, two different sets of design values expressed in terms of maximum tension steel ratio and neutral axis to beam effective depths for different concrete and steel yield strengths are evaluated. Finally, simplified guidelines for designing RC beams satisfying the proposed deformability requirement are developed for practical design application. © 2011 Vilnius Gediminas Technical University (VGTU) Press Technika.
Persistent Identifierhttp://hdl.handle.net/10722/137256
ISSN
2015 Impact Factor: 1.53
2015 SCImago Journal Rankings: 0.907
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong200910159034
Funding Information:

Generous support from Seed Funding Programme for Basic Research (Project Code: 200910159034) provided by The University of Hong Kong is acknowledged.

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.citationJournal Of Civil Engineering And Management, 2011, v. 17 n. 3, p. 409-423en_HK
dc.identifier.issn1392-3730en_HK
dc.identifier.urihttp://hdl.handle.net/10722/137256-
dc.description.abstractIn the design of reinforced concrete (RC) beams located in low-moderate seismicity regions, adequate flexural deformability apart from flexural strength to cater for the imposed seismic demand should be designed. As per the existing RC design codes, this is achieved by restricting the maximum neutral axis depth or tension steel ratio, or limiting the minimum confining steel. However, these deemed-to-satisfy rules were derived many years ago based on normal-strength concrete and steel, which would impair the deformability when applied directly to RC beams made of high-strength materials. To resolve the problem, a new design method based on a prescribed deformability is advocated. In this study, the authors proposed that instead of complying with the deemed-to-satisfy rules, a consistent deformability derived based on the design requirements of Eurocode 2 should be provided to all RC beams located in low-moderate seismicity regions. Using the theoretical formulas developed previously by the authors, two different sets of design values expressed in terms of maximum tension steel ratio and neutral axis to beam effective depths for different concrete and steel yield strengths are evaluated. Finally, simplified guidelines for designing RC beams satisfying the proposed deformability requirement are developed for practical design application. © 2011 Vilnius Gediminas Technical University (VGTU) Press Technika.en_HK
dc.languageengen_US
dc.relation.ispartofJournal of Civil Engineering and Managementen_HK
dc.subjectBeamsen_HK
dc.subjectConfinementen_HK
dc.subjectCurvatureen_HK
dc.subjectDeformabilityen_HK
dc.subjectDesign formulasen_HK
dc.subjectHigh-strength concreteen_HK
dc.subjectHigh-strength steelen_HK
dc.subjectLow-moderate seismicityen_HK
dc.subjectReinforced concreteen_HK
dc.subjectRotation capacityen_HK
dc.titleLimited deformability design of high-strength concrete beams in low to moderate seismicity regionsen_HK
dc.typeArticleen_HK
dc.identifier.emailHo, JCM:johnny.ho@hku.hken_HK
dc.identifier.authorityHo, JCM=rp00070en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.3846/13923730.2011.594219en_HK
dc.identifier.scopuseid_2-s2.0-81255188605en_HK
dc.identifier.hkuros191311en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-81255188605&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume17en_HK
dc.identifier.issue3en_HK
dc.identifier.spage409en_HK
dc.identifier.epage423en_HK
dc.identifier.isiWOS:000294583600010-
dc.identifier.scopusauthoridHo, JCM=24831880500en_HK
dc.identifier.scopusauthoridZhou, KJH=37073984000en_HK

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