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Experimental study on structural performance of UHPC and UHPFRC columns confined with steel tube
https://orcid.org/0000-0003-4461-7187
Highlights Eighteen circular steel tube confined UHPC and UHPFRC columns were tested under axial loading on only the concrete core. The incorporation of steel fibers even up to 2% by volume has a negligible effect on strength enhancement. Steel fibers can enhance the ductility in the post-peak stage only for the intermediate columns and minimize the localized deformation of the steel tube. It is more reasonable to use UHPC without steel fibers for this column type.
Abstract Structural performance of circular steel tube confined ultra high performance concrete (UHPC) columns under uniaxial compression was presented in this study. In addition to plain UHPC, steel fibers reinforced UHPC (UHPFRC) with 1% and 2% by volume were also investigated. A total of eighteen composite columns including short and intermediate columns were constructed and tested. Test results indicated that a substantial improvement in the strength and ductility was obtained by means of loading on only the concrete core. All specimens exhibited a shear plane failure of the UHPC and UHPFRC core which is normally associated with the softening behavior. The incorporation of steel fibers can enhance the ductility only for the intermediate columns and minimize the localized deformation of the columns. The influences of steel fibers and steel tube thickness on the axially compressive behavior were also identified. The analysis of test results demonstrated that the addition of steel fibers has negligible effect on the response of axial load versus axial strain. Furthermore, the impact of steel tube thickness and the confinement index on the strength and ductility was found to be more dominant than that of steel fibers.
Experimental study on structural performance of UHPC and UHPFRC columns confined with steel tube
https://orcid.org/0000-0003-4461-7187
Highlights Eighteen circular steel tube confined UHPC and UHPFRC columns were tested under axial loading on only the concrete core. The incorporation of steel fibers even up to 2% by volume has a negligible effect on strength enhancement. Steel fibers can enhance the ductility in the post-peak stage only for the intermediate columns and minimize the localized deformation of the steel tube. It is more reasonable to use UHPC without steel fibers for this column type.
Abstract Structural performance of circular steel tube confined ultra high performance concrete (UHPC) columns under uniaxial compression was presented in this study. In addition to plain UHPC, steel fibers reinforced UHPC (UHPFRC) with 1% and 2% by volume were also investigated. A total of eighteen composite columns including short and intermediate columns were constructed and tested. Test results indicated that a substantial improvement in the strength and ductility was obtained by means of loading on only the concrete core. All specimens exhibited a shear plane failure of the UHPC and UHPFRC core which is normally associated with the softening behavior. The incorporation of steel fibers can enhance the ductility only for the intermediate columns and minimize the localized deformation of the columns. The influences of steel fibers and steel tube thickness on the axially compressive behavior were also identified. The analysis of test results demonstrated that the addition of steel fibers has negligible effect on the response of axial load versus axial strain. Furthermore, the impact of steel tube thickness and the confinement index on the strength and ductility was found to be more dominant than that of steel fibers.
Experimental study on structural performance of UHPC and UHPFRC columns confined with steel tube
https://orcid.org/0000-0003-4461-7187
Highlights Eighteen circular steel tube confined UHPC and UHPFRC columns were tested under axial loading on only the concrete core. The incorporation of steel fibers even up to 2% by volume has a negligible effect on strength enhancement. Steel fibers can enhance the ductility in the post-peak stage only for the intermediate columns and minimize the localized deformation of the steel tube. It is more reasonable to use UHPC without steel fibers for this column type.
Abstract Structural performance of circular steel tube confined ultra high performance concrete (UHPC) columns under uniaxial compression was presented in this study. In addition to plain UHPC, steel fibers reinforced UHPC (UHPFRC) with 1% and 2% by volume were also investigated. A total of eighteen composite columns including short and intermediate columns were constructed and tested. Test results indicated that a substantial improvement in the strength and ductility was obtained by means of loading on only the concrete core. All specimens exhibited a shear plane failure of the UHPC and UHPFRC core which is normally associated with the softening behavior. The incorporation of steel fibers can enhance the ductility only for the intermediate columns and minimize the localized deformation of the columns. The influences of steel fibers and steel tube thickness on the axially compressive behavior were also identified. The analysis of test results demonstrated that the addition of steel fibers has negligible effect on the response of axial load versus axial strain. Furthermore, the impact of steel tube thickness and the confinement index on the strength and ductility was found to be more dominant than that of steel fibers.
Experimental study on structural performance of UHPC and UHPFRC columns confined with steel tube
Hoang, An Le (author) / Fehling, Ekkehard (author) / Lai, Binglin (author) / Thai, Duc-Kien (author) / Chau, Nguyen Van (author)
Engineering Structures ; 187 ; 457-477
2019-02-26
21 pages
Article (Journal)
Electronic Resource
English
UHPC , UHPFRC , Steel tube , Steel fibers , Composite columns , Strength , Ductility , Confinement index
Experimental study on the compressive behavior of circular steel tube confined UHPC columns
| British Library Conference Proceedings | 2018