Experimental investigation on hollow-steel-tube columns with external confinements
作者： Mianheng Lai , Chengwei Li , Johnny Ching Ming Ho , Man-Tai Chen , None
DOI: 10.1016/J.JCSR.2019.105865
关键词:
摘要: Abstract Tubular steel members with slender cross-sections in compression are prone to local buckling. Different approaches, such as infilling concrete, installation of internal stiffeners and externally bonding fiber-reinforced polymer reinforcement, have been developed retard the buckling tubular sections, hence improve performance structures. In this study, a total 35 circular hollow-steel-tube (HST) stub columns both non-slender confined by different types external confinements, namely ring, spiral jacket confinements were tested experimental program. The uni-axial behavior HST columns, including failure mode, ultimate load-carrying capacity, stiffness ductility, studied discussed. enhancements strength, ductility assessed. results indicated that improvements on strength insignificant for considerable cross-sections, whilst was substantially enhanced confinements. Based results, equations column evaluation considering effects cross-section slenderness ratio, confinement, proposed which able predict unconfined columns.
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