Behaviour of Filament Wound FRP-Rubberised Concrete-Steel Hybrid Double Skin Tubular Column (Hybrid RuDSTC) Under Axial Loading

Hybrid double-skin tubular column formed by three different materials namely fiber reinforced polymer (FRP) tube, concrete, and steel, is the new age column that is gaining popularity due to its high axial capacity, excellent corrosion resistance, and improved ductility. Filament wound FRP tubes are considered as a potential construction material by the researchers which offer both longitudinal and lateral strength. The use of rubberised concrete as the sandwiched material is a new concept that will make this column a potentially viable sustainable structural column. This paper focuses on the behaviour of stub hybrid RuDSTCs composed of filament wound FRP, rubberized concrete, and steel under compression loading. The parameters are different rubber replacement ratios and outer FRP tube types. Results of this investigation show that hybrid RuDSTC has excellent ductility with a reasonable strength reduction due to the use of rubberised concrete which can be optimized for real-life applications in seismic prone areas and as mining infrastructure.