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Experimental Study on Combined Column of Steel Pipe
Liang Zheng,Shengrun Dou,Wen Wang,Ying Gao,Hongwei Gai 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.1
To study the properties of various steel-pipe combined columns, ten steel pipe combined columns were designed, including fi ve axial compression specimens and fi ve eccentric compression specimens. The test mainly investigated the infl uence of the combination of a fl ange steel pipe and web steel pipe on the combined column, including the overall failure mode, local failure mode, load–displacement curve, bearing capacity, and stability of the fl ange steel pipe and web steel pipes. The test results showed that the overall and local failure modes of the axial compression specimens with diff erent steel pipe combinations were diff erent. The failure modes of the eccentric compression specimens with diff erent steel pipe combinations were almost identical. Except for the eccentric compression specimen PZH2, none of the other eccentric compression specimens exhibited local buckling. The combination of the fl ange steel pipes and web steel pipes near the fl ange steel pipes had an obviously eff ect on the bearing capacity, while the combination of steel pipes in the middle of the web had a lower eff ect on the bearing capacity. During the loading process, the fl ange and web steel pipe did not lose stability, and the weld between the steel pipes of the axial compression specimen and the eccentric compression specimen was not damaged. There was no obvious separation between the unwelded parts of the steel pipes.
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