| Title |
An Experimental Study on Buckling Behaviors of Cold-formed Carbon Steel Square Hollow Section Compressive Members under a Concentric Axial Load |
| Authors |
강현식(Kang, HyunSik) ; 김태수(Kim, TaeSoo) |
| DOI |
https://doi.org/10.5659/JAIK.2022.38.10.273 |
| Keywords |
Cold-formed Carbon Steel; Square hollow section; Buckling strength; Local buckling; Member buckling; Design code |
| Abstract |
An experimental study was performed to investigate the structural behaviors of cold-formed carbon steel square hollow section columns to
provide basic data of Korean design specifications for cold-formed steel structures. Specimens were fabricated with carbon steel square pipes
for general structural purpose (SRT275). Main variables included the column length of 250mm, 1000mm and 2000mm, section dimension of
50x50mm and 75x75mm and section thickness of 2.0mm and 2.9mm. The initial imperfections of the specimen surface were measured and
the material properties of these specimens satisfied the minimum requirement of Korean standards. All of the specimens or stubs with the
column length of 250mm showed local buckling. The ultimate state of specimens with 1000mm and 2000mm column lengths were determined
by local buckling or global buckling. Despite the large slenderness ratio, local buckling was observed in some specimens with a slender
section element and a relatively large width-thickness ratio. Test results were compared with ultimate buckling strengths predicted by current
design specifications of the Korean Design Standard (KDS), American Institute of Steel Construction (AISC), Eurocode 3 (EC3), and the
American Iron and Steel Institute (AISI).* |