Abstract
Circular hollow sections (CHS) are common in structural engineering owing to their excellent aesthetic appearance and structural behaviour. However, there is no existing experimental study into the cross-sectional behaviour of stainless steel CHS in fire. To fill this gap, an experimental study performed on austenitic stainless steel CHS in fire is presented in this paper. A total of eight CHS stub columns were examined at different temperatures, spanning from 20 °C to 800 °C. The material properties, geometric characteristics and local geometric imperfections of the tested CHS stub columns were also obtained simultaneously. Finally, the accuracy of EN 1993-1-2 design rules and a recent design method proposed by Quan et al. was assessed based on the obtained test data. It is shown that, compared to the design rules of EN 1993-1-2, the ultimate cross-sectional resistances predicted by the design method of Quan et al. can achieve higher accuracy and reliability for stainless steel CHS in fire.
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