AXIAL COMPRESSION TESTS AND THE DESIGN METHOD FOR COLD-FORMED THIN-WALLED LIPPED CHANNEL COLUMNS WITH WEB OPENINGS

YAO Xingyou; YIN Jiawen; GUO Yanli

doi:10.13204/j.gyjzG2010908

Volume 51 Issue 7

Nov. 2021

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YAO Xingyou, YIN Jiawen, GUO Yanli. AXIAL COMPRESSION TESTS AND THE DESIGN METHOD FOR COLD-FORMED THIN-WALLED LIPPED CHANNEL COLUMNS WITH WEB OPENINGS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 113-122,208. doi: 10.13204/j.gyjzG2010908

Citation:

YAO Xingyou, YIN Jiawen, GUO Yanli. AXIAL COMPRESSION TESTS AND THE DESIGN METHOD FOR COLD-FORMED THIN-WALLED LIPPED CHANNEL COLUMNS WITH WEB OPENINGS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 113-122,208. doi: 10.13204/j.gyjzG2010908

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AXIAL COMPRESSION TESTS AND THE DESIGN METHOD FOR COLD-FORMED THIN-WALLED LIPPED CHANNEL COLUMNS WITH WEB OPENINGS

doi: 10.13204/j.gyjzG2010908

1. School of Architecture and Civil Engineering, Nanchang Institute of Technology, Nanchang 330099, China;
2. Jiangxi Province Key Laboratory of Hydraulic and Civil Engineering Infrastructure Security, Nanchang Institute of Technology, Nanchang 330099, China

Received Date: 2020-10-09
Available Online: 2021-11-11

Abstract

Abstract

To sutdy the global buckling property of cold-formed thin-walled lipped channel columns with web openings and the calculated method of the overall stability and loading capacity for the compressive columns, based on the effective width method, the tests of axial compression for the cold-formed thin-walled lipped channel columns were conducted, which had different cross sections of webs, circular or rectangular web openings, and opening sizes.There were 6 specimens without openings, 18 specimens with circular openings, and 18 specimens with rectangular openings. The diameters of normalized circular openings were 0.3, 0.5, and 0.7 times web height. The heights of normalized rectangular openings were 0.3, 0.5, and 0.7 times web height. The ratios of length-to-width of rectangular opening were 2. The test results showed that the specimens with smaller ratios of width-to-thickness were prone to flexural-torsional buckling, whlie the specimens with larger ratios of width-to-thickness were controlled by local interaction buckling, distortional and global buckling. The capacity of local buckling increased with the increase of the normalized hole sizes. Compared with the specimens without openings, the ultimate capcity of the specimens with openings decreased slightly.Then the experiments were simulated by finite element software ABAQUS. The simulation results showed good agreement with the test results which indicated the finite element method could analyze the specimens with web openings accurately and feasibly. Furthermore, the formula to predicte the elastic global buckling critical stress was revised based on parameter analysis of specimens with web openings by FEM.
- cold-formed thin-walled steel,
- web opening,
- axial compressed member,
- global buckling,
- interactive buckling

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References(13)

References

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