Local buckling of cold formed steel in composite structural elements at elevated temperatures

Behaviour of steel beam to concrete-filled SHS column frames: Finite element model and verifications

“…B and t s are the overall dimension and thickness of the square steel tube, respectively. The width-to-thickness ratio of the square tubes is less than the limit given in Uy and Bradford [29] (a) Arrangement of test set-up.…”

Compressive and flexural behaviour of concrete filled steel tubes after exposure to standard fire

“…The dimensions of these tubes are given in Table 1, where D, t s and L refer to the cross-section dimension, steel thickness and specimen length in mm. An inelastic semi-analytical finite strip method was used to analyse the local buckling behaviour of cold formed steel plates of composite steel-concrete structural elements at elevated temperatures [32]. It was found that, in general, the required plate slenderness limits at high temperatures are higher to avoid local buckling than those that apply at ambient temperature.…”

Fire behaviour of high strength self-consolidating concrete filled steel tubular stub columns

“…In addition, fire endurance of the CFST columns is better than that of unfilled tubular columns due to the favorable thermal and structural interaction of the steel and concrete in the composite columns. The concrete used to fill the CFST columns was normal strength and high strength conventional concrete or fibre reinforced concrete in the previous research [12][13][14][15][16][17][18]. Nevertheless, the fire performance of the high strength SCC filled steel tubular columns is still unknown.…”

“…There has been intensive investigation into the behaviour of CFST columns exposed to fire [12][13][14][15][16][17][18]. It is generally believed that the in-filled concrete serves as a heat sink in the composite sections.…”