Vol. 19, No. 2, pp. 150-156 (2023)
EXPERIMENTAL STUDY ON INTERACTION OF DISTORTIONAL AND GLOBAL
BUCKLING OF STAINLESS STEEL LIPPED CHANNEL COLUMNS
Mei-Jing Liu 1, Jun-Feng Liu 2, Mei-He Chen 3, *, Guang-Ming Yu 4, Sheng-Gang Fan 5 and Cheng-Long Wan 3
1 Department of Civil Engineering, Southeast University Chengxian College, Nanjing, China
2 Three Gorges Renewables Yangjiang Power Co.,Ltd.,Yangjiang,Guangdong, China
3 China Academy of Building Research, Beijing, China
4 Institute of Science and Technology, China Three Gorges Corporation, Beijing, China
5 Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University, Jiulonghu Campus, Nanjing, China
* (Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 8 August 2022; Revised: 16 December 2022; Accepted: 29 December 2022
DOI:10.18057/IJASC.2023.19.2.7
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ABSTRACT
This paper presents an experimental program to investigate distortional and global interaction buckling of stainless steel lipped channel columns in compression. Appropriate cross-sections and lengths were chosen so as to observe distortional-overall interaction buckling. In total, 21 buckling tests were conducted. After a brief introduction to the choice of column specimen geometries, key experimental results have been presented and discussed. The tests aim to study and observe the effect of distortional-global interactive buckling, study member under pin-ended boundary conditions, and provide benchmarks for design. Column tests were carried out with 13 position transducers monitoring displacements at key locations. A 3-D laser scanner was used to measure the imperfection shapes and magnitudes of the columns before testing. Material tests have been performed to determine the mechanical properties of stainless steel. Distortional–global interactive buckling of all columns is shown to be a failure mode. The experimental results are also used to evaluate the Australian Standard AS/NZS, North American Specification AISI, as well as formulation proposed by Becque and Rasmussen’s predictions, indicated that the Direct Strength Method (DSM) as described in AISI and AS/NZS for members undergoing distortional-overall interaction buckling are unconservative. Becque and Rasmussen’s curve is much closer to the test points than DSM in AISI and AS/NZS.
KEYWORDS
Stainless steel, Buckling mode interaction, Lipped channel column, Direct strength method, Axial compression test
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