Abstract
Hollow Core FRP- Concrete- Steel (HCFCS) columns are an advancement over hollow core columns, in which concrete is confined between an outer FRP tube and an inner steel tube. They consists of different types of materials and hence, combines and make advantage of all these materials. Steel tube in these columns itself act as a formwork and also as longitudinal and shear reinforcement. The concrete sandwiched between FRP tube at outside and steel tube inside is effectively confined. Outer FRP and inner steel tube offer continuous confinement to the concrete core, thus improving the strength and ductility of column. They are mainly used as bridge columns in seismic areas. This study is concerned with the behavior of Hollow Core FRP- Concrete- Steel columns with inner square steel tube subjected to eccentric loading. Finite Element study was done in Ansys Workbench. Various parameters were examined including the thickness of steel tube, type of fiber and the shape of column section. HCFCS column with inner square steel tube has shown a larger ultimate load compared to the column with inner circular steel tube.
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