File Download
Supplementary

Conference Paper: Improved behaviour of concrete-filled-stee-tube columns with external confinement

TitleImproved behaviour of concrete-filled-stee-tube columns with external confinement
Authors
KeywordsConcrete-filled-steel-tube
External confinement
Normal-strength concrete
Rings
Ties
Issue Date2011
Citation
The Australian Earthquake Engineering Society (AEES) 2011 Conference, Barossa Valley, South Australia, 18-20 November 2011. In Proceedings of the AEES Conference, 2011, paper 27 How to Cite?
AbstractIn high-strength concrete columns, because of the heavy demand of confining steel to restore the column ductility, it is more efficient to provide the confinement in the form of steel tube to form concrete-filled-steel-tube (CFST) column. Comparing with the transverse steel, CFST columns provide a stronger and more uniform confining pressure to the concrete core, and reduce the steel congestion problem for better concrete placing quality. However, a major shortcoming of CFST columns is the imperfect steel-concrete interface bonding at the elastic stage as steel dilates more than concrete in compression. This adversely affects the confinement of the steel tube 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 to study the effectiveness of external confinement. From the results, it was found that: (1) Both rings and ties improved the stiffness of the CFST columns; (2) The rings improve significantly the axial strength of the CFST columns while the ties did not improve the axial strength; (3) All externally confined CFST columns can reach a strain of at least 20% before failure occurs.
Persistent Identifierhttp://hdl.handle.net/10722/160509

 

DC FieldValueLanguage
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 Australian Earthquake Engineering Society (AEES) 2011 Conference, Barossa Valley, South Australia, 18-20 November 2011. In Proceedings of the AEES Conference, 2011, paper 27en_US
dc.identifier.urihttp://hdl.handle.net/10722/160509-
dc.description.abstractIn high-strength concrete columns, because of the heavy demand of confining steel to restore the column ductility, it is more efficient to provide the confinement in the form of steel tube to form concrete-filled-steel-tube (CFST) column. Comparing with the transverse steel, CFST columns provide a stronger and more uniform confining pressure to the concrete core, and reduce the steel congestion problem for better concrete placing quality. However, a major shortcoming of CFST columns is the imperfect steel-concrete interface bonding at the elastic stage as steel dilates more than concrete in compression. This adversely affects the confinement of the steel tube 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 to study the effectiveness of external confinement. From the results, it was found that: (1) Both rings and ties improved the stiffness of the CFST columns; (2) The rings improve significantly the axial strength of the CFST columns while the ties did not improve the axial strength; (3) All externally confined CFST columns can reach a strain of at least 20% before failure occurs.-
dc.languageengen_US
dc.relation.ispartofProceedings of the AEES Conference 2011en_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectConcrete-filled-steel-tube-
dc.subjectExternal confinement-
dc.subjectNormal-strength concrete-
dc.subjectRings-
dc.subjectTies-
dc.titleImproved behaviour of concrete-filled-stee-tube columns with external confinementen_US
dc.typeConference_Paperen_US
dc.identifier.emailHo, JCM: jcmho1@hkucc.hku.hken_US
dc.identifier.authorityHo, JCM=rp00070en_US
dc.description.naturepostprint-
dc.identifier.hkuros204893en_US
dc.publisher.placeAustralia-
dc.description.otherThe Australian Earthquake Engineering Society (AEES) 2011 Conference, Barossa Valley, South Australia, 18-20 November 2011. In Proceedings of the AEES Conference, 2011, paper 27-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats