Project Description:
Rubberised concrete (RuC) has emerged as an eco-friendly alternative in construction by utilizing waste tires as aggregates, promoting sustainability. Enhancing the structural performance of RuC involves employing steel tubes to confine the RuC core, either as single or double skins. This research delves into experimental and numerical investigations on rubberised concrete-filled double-skin steel tube (RuCFDST) under four-point bending and axial compression.
The study explores variables such as steel tube slenderness ratio, hollow ratio, and rubber replacement ratio. Coarse rubber particles replace natural coarse aggregates at ratios of 0%, 15%, and 30% by mass. Despite a notable reduction in concrete strength at higher rubber replacement ratios, the study reveals a relatively modest decrease in member capacity due to substantial contributions from the steel tube and significant confinement effects within the RuC. The ductility of specimens improved when RuC was used for filling the columns. It is recommended to use a RuCFDST column with a small hollow ratio to satisfy both the required compressive capacity and ductility. In bending, compared to members with normal concrete (NC), RuC members demonstrate a remarkable increase of up to 70% in ductility and 28% in energy dissipation, depending on rubber content.
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Duration: 2019- 2023 Research Methods:
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Team: QUT :
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