A review and analysis of circular UHPC filled steel tube columns under axial loading

An Le Hoang and Ekkehard Fehling

Abstract

Ultra high performance concrete (UHPC) has aroused interest around the world owing to superior mechanical and durability properties over conventional concrete. However, the application of UHPC in practice poses difficulties due to its inherent brittleness. UHPC filled in steel tube columns (UHPC-FSTCs) are capable of restricting the brittle failure of non-reinforced UHPC columns and forming a high performance member with enhancement of strength and ductility. Currently, research on UHPC-FSTCs remains very limited and there is relatively little information about the mechanical behavior of these columns. Therefore, this study presents a review of past experimental studies to have a deeper insight into the compressive behavior of UHPC-FSTCs under axial loading on entire section and on concrete core. Based on the test results obtained from Schneider (2006) and Xiong (2012), an analysis was conducted to investigate the influence of the confinement index (

Key Words

UHPC; confinement index; strength; ductility; steel tube columns; design codes

Address

An Le Hoang: Division of Construction Computation, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam An Le Hoang: Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam An Le Hoang, Ekkehard Fehling: Faculty of Civil and Environmental Engineering, Institute of Structural Engineering, University of Kassel, Kurt-Wolters-Strasse 3, 34125, Kassel, Germany

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