Journal
ADVANCES IN STRUCTURAL ENGINEERING
Volume 18, Issue 10, Pages 1737-1746Publisher
SAGE PUBLICATIONS INC
DOI: 10.1260/1369-4332.18.10.1737
Keywords
FRP; double-skin tubular columns (DSTCs); confinement; eccentric compression; slender columns; large-scale tests
Funding
- Ministry of Education of China [J20120118]
- Science and Technology Department of Zhejiang Province [2011C31006]
- National Natural Science Foundation of China [51108410]
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FRP-Concrete-Steel Double-Skin Tubular Columns (DSTCs) are a new form of hybrid columns which effectively combines the advantages of the constituent materials. A DSTC consists of an outer fibre-reinforced polymer (FRP) tube and an inner steel tube with the gap between filled with concrete. This paper presents the first-ever large-scale tests on slender DSTCs subjected to eccentric compression. The major parameters examined include the load eccentricity and the confinement stiffness of the FRP tube. Test results show that slender DSTCs possess good ductility under eccentric compression. Larger load eccentricity results in lower axial load capacity and higher deformability; larger confinement stiffness of the FRP tube results in larger axial load capacity and deformability. The axial strain distribution of a DSTC section subjected to eccentric compression generally conforms to the plane section assumption, but the ultimate axial strain of concrete is increased as a result of eccentric compression.
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