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Conference Paper: Flexural strength and ductility improvement of NSC beams

TitleFlexural strength and ductility improvement of NSC beams
Authors
KeywordsConcrete beam
Ductility
Equivalent concrete stress
Normal strength
Strain gradient
Strength
Issue Date2011
PublisherWorld Academy of Science, Engineering and Technology (WASET). The Journal's web site is located at http://www.waset.org/publications.php
Citation
The 8th International Conference on Earthquake Resistant Engineering Structures (ERES 2011), Chianciano Terme, Italy, 7-9 September 2011. In Proceedings of World Academy of Science, Engineering & Technology, 2011, v. 5 n. 11, p. 882-888 How to Cite?
AbstractIn order to calculate the flexural strength of normal-strength concrete (NSC) beams, the nonlinear actual concrete stress distribution within the compression zone is normally replaced by an equivalent rectangular stress block, with two coefficients of α and β to regulate the intensity and depth of the equivalent stress respectively. For NSC beams design, α and β are usually assumed constant as 0.85 and 0.80 in reinforced concrete (RC) codes. From an earlier investigation of the authors, α is not a constant but significantly affected by flexural strain gradient, and increases with the increasing of strain gradient till a maximum value. It indicates that larger concrete stress can be developed in flexure than that stipulated by design codes. As an extension and application of the authors- previous study, the modified equivalent concrete stress block is used here to produce a series of design charts showing the maximum design limits of flexural strength and ductility of singly- and doubly- NSC beams, through which both strength and ductility design limits are improved by taking into account strain gradient effect.
DescriptionOpen Access Journal
Persistent Identifierhttp://hdl.handle.net/10722/160510
ISSN
2014 SCImago Journal Rankings: 0.133

 

DC FieldValueLanguage
dc.contributor.authorPeng, Jen_US
dc.contributor.authorHo, JCMen_US
dc.date.accessioned2012-08-16T06:12:54Z-
dc.date.available2012-08-16T06:12:54Z-
dc.date.issued2011en_US
dc.identifier.citationThe 8th International Conference on Earthquake Resistant Engineering Structures (ERES 2011), Chianciano Terme, Italy, 7-9 September 2011. In Proceedings of World Academy of Science, Engineering & Technology, 2011, v. 5 n. 11, p. 882-888en_US
dc.identifier.issn2010-376X-
dc.identifier.urihttp://hdl.handle.net/10722/160510-
dc.descriptionOpen Access Journal-
dc.description.abstractIn order to calculate the flexural strength of normal-strength concrete (NSC) beams, the nonlinear actual concrete stress distribution within the compression zone is normally replaced by an equivalent rectangular stress block, with two coefficients of α and β to regulate the intensity and depth of the equivalent stress respectively. For NSC beams design, α and β are usually assumed constant as 0.85 and 0.80 in reinforced concrete (RC) codes. From an earlier investigation of the authors, α is not a constant but significantly affected by flexural strain gradient, and increases with the increasing of strain gradient till a maximum value. It indicates that larger concrete stress can be developed in flexure than that stipulated by design codes. As an extension and application of the authors- previous study, the modified equivalent concrete stress block is used here to produce a series of design charts showing the maximum design limits of flexural strength and ductility of singly- and doubly- NSC beams, through which both strength and ductility design limits are improved by taking into account strain gradient effect.-
dc.languageengen_US
dc.publisherWorld Academy of Science, Engineering and Technology (WASET). The Journal's web site is located at http://www.waset.org/publications.php-
dc.relation.ispartofWorld Academy of Science, Engineering and Technology. Proceedingsen_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectConcrete beam-
dc.subjectDuctility-
dc.subjectEquivalent concrete stress-
dc.subjectNormal strength-
dc.subjectStrain gradient-
dc.subjectStrength-
dc.titleFlexural strength and ductility improvement of NSC beamsen_US
dc.typeConference_Paperen_US
dc.identifier.emailHo, JCM: jcmho1@hkucc.hku.hken_US
dc.identifier.authorityHo, JCM=rp00070en_US
dc.description.naturepublished_or_final_version-
dc.identifier.hkuros204894en_US
dc.identifier.volume5-
dc.identifier.issue11-
dc.identifier.spage882en_US
dc.identifier.epage888en_US
dc.publisher.placeTurkey-

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