File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Uni-axial behaviour of normal-strength concrete-filled-steel-tube columns with external confinement

TitleUni-axial behaviour of normal-strength concrete-filled-steel-tube columns with external confinement
Authors
KeywordsAxial strength
CFST columns
Concrete core
Concrete-filled-steel-tube
Confining effect
Issue Date2012
PublisherTechno-Press. The Journal's web site is located at http://technop.kaist.ac.kr/?journal=eas&subpage=1#
Citation
Earthquakes and Structures, 2012, v. 3 n. 6, p. 889-910 How to Cite?
AbstractBecause of the heavy demand of confining steel to restore the column ductility in seismic regions, it is more efficient to confine these columns by hollow steel tube to form concrete-filled-steeltube (CFST) column. Compared with transverse reinforcing steel, steel tube provides a stronger and more uniform confining pressure to the concrete core, and reduces the steel congestion problem for better concrete placing quality. However, a major shortcoming of CFST columns is the imperfect steel-concrete interface bonding occurred at the elastic stage as steel dilates more than concrete in compression. This adversely affects the confining effect and decrease the elastic modulus. To resolve the problem, it is proposed in this study to use external steel confinement in the forms of rings and ties to restrict the dilation of steel tube. For verification, a series of uni-axial compression test was performed on some CFST columns with external steel rings and ties. From the results, it was found that: (1) Both rings and ties improved the stiffness of the CFST columns and (2) the rings improve significantly the axial strength of the CFST columns while the ties did not improve the axial strength. Lastly, a theoretical model for predicting the axial strength of confined CFST columns will be developed.
Persistent Identifierhttp://hdl.handle.net/10722/159437
ISSN
2015 Impact Factor: 0.789
2015 SCImago Journal Rankings: 0.587

 

DC FieldValueLanguage
dc.contributor.authorHo, JCMen_US
dc.contributor.authorLuo, Len_US
dc.date.accessioned2012-08-16T05:49:54Z-
dc.date.available2012-08-16T05:49:54Z-
dc.date.issued2012en_US
dc.identifier.citationEarthquakes and Structures, 2012, v. 3 n. 6, p. 889-910en_US
dc.identifier.issn2092-7614-
dc.identifier.urihttp://hdl.handle.net/10722/159437-
dc.description.abstractBecause of the heavy demand of confining steel to restore the column ductility in seismic regions, it is more efficient to confine these columns by hollow steel tube to form concrete-filled-steeltube (CFST) column. Compared with transverse reinforcing steel, steel tube provides a stronger and more uniform confining pressure to the concrete core, and reduces the steel congestion problem for better concrete placing quality. However, a major shortcoming of CFST columns is the imperfect steel-concrete interface bonding occurred at the elastic stage as steel dilates more than concrete in compression. This adversely affects the confining effect and decrease the elastic modulus. To resolve the problem, it is proposed in this study to use external steel confinement in the forms of rings and ties to restrict the dilation of steel tube. For verification, a series of uni-axial compression test was performed on some CFST columns with external steel rings and ties. From the results, it was found that: (1) Both rings and ties improved the stiffness of the CFST columns and (2) the rings improve significantly the axial strength of the CFST columns while the ties did not improve the axial strength. Lastly, a theoretical model for predicting the axial strength of confined CFST columns will be developed.-
dc.languageengen_US
dc.publisherTechno-Press. The Journal's web site is located at http://technop.kaist.ac.kr/?journal=eas&subpage=1#-
dc.relation.ispartofEarthquakes and Structuresen_US
dc.subjectAxial strength-
dc.subjectCFST columns-
dc.subjectConcrete core-
dc.subjectConcrete-filled-steel-tube-
dc.subjectConfining effect-
dc.titleUni-axial behaviour of normal-strength concrete-filled-steel-tube columns with external confinementen_US
dc.typeArticleen_US
dc.identifier.emailHo, JCM: jcmho1@hkucc.hku.hken_US
dc.identifier.authorityHo, JCM=rp00070en_US
dc.identifier.scopuseid_2-s2.0-84873966910-
dc.identifier.hkuros204891en_US
dc.identifier.volume3en_US
dc.identifier.issue6-
dc.identifier.spage889-
dc.identifier.epage910-
dc.publisher.placeKorea, Republic of-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats