Test on circular steel tube confined UHPC and UHPFRC colums under axial loading

Author(s) : H. A. Le, E. Fehling
Paper category : Proceedings
Book title : UHPFRC 2017 Designing and Building with UHPFRC: New large-scale implementations, recent technical advances, experience and standards
Editor(s) : F. Toutlemonde & J. ResplendinoT.Ch.
Print-ISBN : 978-2-35158-166-7
e-ISBN : 978-2-35158-167-4
Publisher : RILEM Publications SARL
Publication year : 2017
Pages: 499-508
Total Pages : 10
Language : English

Abstract: This paper presents the behavior of ultra high performance concrete with and without steel fibers (UHPC and UHPFRC) filled circular steel tube columns under axial loading on only concrete core. The experimental investigation was conducted with six columns having an outer diameter of 152.4 mm and steel thickness of 8.8 mm. These columns were divided into short columns with length of 600 mm and long columns with length of 1000 mm. The test results including load versus axial shortening curves, strength enhancement ratio, and ductility index were discussed in detail. In general, the confinement effect induced by steel tube provides an improvement in both strength and ductility for UHPC and UHPFRC. Test results demonstrated that the addition of steel fibers does not increase the strength enhancement for confined concrete, whereas the post-peak ductility can be considerably improved as compared to the columns without steel fibers. Furthermore, the presence of steel fibers reduces the localization of deformation of steel tube and the sudden drop of load right after the first peak load.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00

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