Journal
STRUCTURES
Volume 25, Issue -, Pages 463-480Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.istruc.2020.03.025
Keywords
Aluminium; Circular hollow section (CHS); Circular perforation; Flexural buckling; Local buckling
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Funding
- National Natural Science Foundation of China [51528803]
- Natural Science Foundation of Guangdong Province of China [2018A030313208]
- State Key Laboratory of Subtropical Building Science (South China University of Technology) [2018ZA02]
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Center for Civil (Shenzhen University) [GDDCE 18-5]
- Material of Civil Engineering at Hefei University of Technology
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This paper presents the results of twelve experimental tests on the flexural capacity of perforated aluminium circular hollow section (CHS) tubes; four of which were carried out without perforations. Two heat-treated aluminium alloys were used: 6061-T6 and 6063-T5. The tests covered the size and number of perforations. The flexural capacity, failure modes, and the distribution of strains around circular perforations were determined. The experimental results were then compared against the design strengths calculated from the North American Specification (NAS) for cold-formed steel (CFS) sections with perforations, derived from modified Direct Strength Method (DSM) and modified Continuous Strength Method (CSM) for aluminium alloy members with perforations, which were found to be conservative by approximately 23%, 27% and 22%, respectively. When strength reduction factors were applied, and the unified design equations proposed by Zhou and Young were used, the reduction in strength was 6% conservative to the test strengths.
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