File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: An experimental study on strain gradient effect of equivalent rectangular stress block of normal-strength concrete

TitleAn experimental study on strain gradient effect of equivalent rectangular stress block of normal-strength concrete
Authors
KeywordsEquivalent Concrete Stress
Flexural Strength
Maximum Concrete Stress
Strain Gradient Effect
Uni-Axial Strength
Issue Date2010
PublisherHong Kong Institution of Engineers. The Journal's web site is located at http://www.hkie.org.hk/html/publications/transactions/index.asp
Citation
Transactions Hong Kong Institution Of Engineers, 2010, v. 17 n. 4, p. 12-22 How to Cite?
Abstract
In flexural strength design of normal-strength reinforced concrete (RC) members, the maximum concrete stress adopted by various design codes is originated from the scaled down uni-axial concrete stress-strain curve, in that the behaviour of concrete under flexure is wrongly considered to be more inferior than that under uni-axial compression. Therefore, from published literature, this scaled down concrete stress might be the reason for significant disparity between theoretical and actual flexural strengths. In this study, 12 test specimens, including plain concrete and RC, were fabricated to investigate the maximum concrete stress developed under flexure affected by strain gradient. These specimens were cast in several batches, each batch consisted of one concentrically loaded specimen and one or several eccentrically loaded specimen(s). The concrete stress-strain curve developed in each of the eccentrically loaded specimens was derived by modifying that of its counterpart concentrically loaded specimen based on axial force and moment equilibriums. From the obtained stress-strain curves, it was found that the maximum concrete stress developed In flexure Increased with strain gradient. A formula correlating the maximum concrete stress in flexure to strain gradient is thus developed. Lastly, the widely used equivalent rectangular concrete stress block parameters stipulated in the Hong Kong Concrete code are modified by considering the strain gradient effects.
Persistent Identifierhttp://hdl.handle.net/10722/150555
ISSN
2013 SCImago Journal Rankings: 0.114
References

 

DC FieldValueLanguage
dc.contributor.authorPeng, Jen_US
dc.contributor.authorPam, HJen_US
dc.contributor.authorWong, YLen_US
dc.date.accessioned2012-06-26T06:05:40Z-
dc.date.available2012-06-26T06:05:40Z-
dc.date.issued2010en_US
dc.identifier.citationTransactions Hong Kong Institution Of Engineers, 2010, v. 17 n. 4, p. 12-22en_US
dc.identifier.issn1023-697Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/150555-
dc.description.abstractIn flexural strength design of normal-strength reinforced concrete (RC) members, the maximum concrete stress adopted by various design codes is originated from the scaled down uni-axial concrete stress-strain curve, in that the behaviour of concrete under flexure is wrongly considered to be more inferior than that under uni-axial compression. Therefore, from published literature, this scaled down concrete stress might be the reason for significant disparity between theoretical and actual flexural strengths. In this study, 12 test specimens, including plain concrete and RC, were fabricated to investigate the maximum concrete stress developed under flexure affected by strain gradient. These specimens were cast in several batches, each batch consisted of one concentrically loaded specimen and one or several eccentrically loaded specimen(s). The concrete stress-strain curve developed in each of the eccentrically loaded specimens was derived by modifying that of its counterpart concentrically loaded specimen based on axial force and moment equilibriums. From the obtained stress-strain curves, it was found that the maximum concrete stress developed In flexure Increased with strain gradient. A formula correlating the maximum concrete stress in flexure to strain gradient is thus developed. Lastly, the widely used equivalent rectangular concrete stress block parameters stipulated in the Hong Kong Concrete code are modified by considering the strain gradient effects.en_US
dc.languageengen_US
dc.publisherHong Kong Institution of Engineers. The Journal's web site is located at http://www.hkie.org.hk/html/publications/transactions/index.aspen_US
dc.relation.ispartofTransactions Hong Kong Institution of Engineersen_US
dc.subjectEquivalent Concrete Stressen_US
dc.subjectFlexural Strengthen_US
dc.subjectMaximum Concrete Stressen_US
dc.subjectStrain Gradient Effecten_US
dc.subjectUni-Axial Strengthen_US
dc.titleAn experimental study on strain gradient effect of equivalent rectangular stress block of normal-strength concreteen_US
dc.typeArticleen_US
dc.identifier.emailPam, HJ:pamhoatjoen@hku.hken_US
dc.identifier.authorityPam, HJ=rp00071en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-79952561444en_US
dc.identifier.hkuros206053-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79952561444&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume17en_US
dc.identifier.issue4en_US
dc.identifier.spage12en_US
dc.identifier.epage22en_US
dc.publisher.placeHong Kongen_US
dc.identifier.scopusauthoridPeng, J=35335169300en_US
dc.identifier.scopusauthoridPam, HJ=6602976141en_US
dc.identifier.scopusauthoridWong, YL=7403041495en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats