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Conference Paper: Modification on equivalent stress block of normal-strength concrete by incorporating strain gradient effects

TitleModification on equivalent stress block of normal-strength concrete by incorporating strain gradient effects
Authors
KeywordsEquivalent Concrete Stress Block
Flexural Strength
Reinforced Concrete
Strain Gradient
Stress-Strain Curve
Issue Date2011
Citation
The 12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-12), Hong Kong, China, 26-28 January 2011. In Procedia Engineering, 2011, v. 14, p. 2246-2253 How to Cite?
AbstractThe equivalent rectangular concrete stress block is widely adopted in flexural strength design of normal-strength reinforced concrete members. From the past research work reported by other researchers, the equivalent stress block parameters was assumed to be dependent only on concrete strength. Nonetheless, the theoretical flexural strengths predicted by the currently used codes were often significantly lower than the actual strengths. In this study, the authors studied the characteristics of equivalent concrete stress block by investigating other factors than concrete strength only. In total 14 inverted T-shaped specimens in 6 groups were fabricated and tested. Each group had identical cross section properties and contained one concentrically loaded specimen and one/several eccentrically loaded specimen(s). The equivalent concrete stress block parameters of the eccentrically loaded specimen were obtained by adopting the modified stress-strain curve of its counterpart concentrically loaded specimen using a numerical analysis method. Based on the experimental results, the authors found that the equivalent stress block parameters are dependent on strain gradient besides concrete strength. A new set of equivalent rectangular concrete stress block parameters incorporating strain gradient effects were proposed for design purpose, and their validities were verified by comparing with the measured flexural strengths of beams and columns tested by previous researchers.
DescriptionProcedia Engineering v.14 is conference proceedings of the 12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC12)
Session - CT4: Concrete Technology IV: EASEC12‐139
Persistent Identifierhttp://hdl.handle.net/10722/152175
ISSN
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorPeng, Jen_US
dc.contributor.authorHo, JCMen_US
dc.contributor.authorPam, HJen_US
dc.date.accessioned2012-06-26T06:35:48Z-
dc.date.available2012-06-26T06:35:48Z-
dc.date.issued2011en_US
dc.identifier.citationThe 12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-12), Hong Kong, China, 26-28 January 2011. In Procedia Engineering, 2011, v. 14, p. 2246-2253en_US
dc.identifier.issn1877-7058 (Online)en_US
dc.identifier.urihttp://hdl.handle.net/10722/152175-
dc.descriptionProcedia Engineering v.14 is conference proceedings of the 12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC12)-
dc.descriptionSession - CT4: Concrete Technology IV: EASEC12‐139-
dc.description.abstractThe equivalent rectangular concrete stress block is widely adopted in flexural strength design of normal-strength reinforced concrete members. From the past research work reported by other researchers, the equivalent stress block parameters was assumed to be dependent only on concrete strength. Nonetheless, the theoretical flexural strengths predicted by the currently used codes were often significantly lower than the actual strengths. In this study, the authors studied the characteristics of equivalent concrete stress block by investigating other factors than concrete strength only. In total 14 inverted T-shaped specimens in 6 groups were fabricated and tested. Each group had identical cross section properties and contained one concentrically loaded specimen and one/several eccentrically loaded specimen(s). The equivalent concrete stress block parameters of the eccentrically loaded specimen were obtained by adopting the modified stress-strain curve of its counterpart concentrically loaded specimen using a numerical analysis method. Based on the experimental results, the authors found that the equivalent stress block parameters are dependent on strain gradient besides concrete strength. A new set of equivalent rectangular concrete stress block parameters incorporating strain gradient effects were proposed for design purpose, and their validities were verified by comparing with the measured flexural strengths of beams and columns tested by previous researchers.en_US
dc.languageengen_US
dc.relation.ispartofProcedia Engineeringen_US
dc.subjectEquivalent Concrete Stress Blocken_US
dc.subjectFlexural Strengthen_US
dc.subjectReinforced Concreteen_US
dc.subjectStrain Gradienten_US
dc.subjectStress-Strain Curveen_US
dc.titleModification on equivalent stress block of normal-strength concrete by incorporating strain gradient effectsen_US
dc.typeConference_Paperen_US
dc.identifier.emailHo, JCM:johnny.ho@hku.hken_US
dc.identifier.emailPam, HJ:pamhoatjoen@hku.hken_US
dc.identifier.authorityHo, JCM=rp00070en_US
dc.identifier.authorityPam, HJ=rp00071en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.proeng.2011.07.283en_US
dc.identifier.scopuseid_2-s2.0-80054783793en_US
dc.identifier.hkuros191314-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80054783793&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume14en_US
dc.identifier.spage2246en_US
dc.identifier.epage2253en_US
dc.identifier.isiWOS:000300368402048-
dc.description.otherThe 12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-12), Hong Kong, China, 26-28 January 2011. In Procedia Engineering, 2011, v. 14, p. 2246-2253-
dc.identifier.scopusauthoridPeng, J=35335169300en_US
dc.identifier.scopusauthoridHo, JCM=24831880500en_US
dc.identifier.scopusauthoridPam, HJ=6602976141en_US

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