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A platform for research: civil engineering, architecture and urbanism
Flexural buckling of extruded high-strength aluminium alloy SHS columns
https://orcid.org/0000-0002-3557-5627
https://orcid.org/0000-0001-9260-495X
Abstract The structural performance and design of extruded high-strength aluminium alloy square hollow section (SHS) columns were presented in this paper. A total of 12 extruded 7A04-T6 aluminium alloy SHS column specimens were tested under axial compression, together with tensile coupon tests and initial global geometric imperfection measurements. The flexural buckling failure mode and axial load versus end shortening and mid-height lateral deflection curves were reported. Based on validated finite element (FE) models, 480 numerical results were generated by means of parametric studies over a broad range of cross-section dimensions, member lengths, proof strengths and strain hardening exponents of the aluminium alloy material. The applicability of current design rules used for normal-strength aluminium alloy columns in European, Chinese and American standards to extruded 7A04-T6 high-strength aluminium alloy SHS columns was evaluated through comparisons with the test and FE results. The analysis results showed that the three standards consistently yielded conservative axial compression resistance predictions by about 9% for extruded 7A04-T6 high-strength aluminium alloy SHS columns. New flexural buckling curves with linear and nonlinear imperfection terms for the Chinese code, as well as modifications to the American specification, were separately proposed, resulting in improved accuracy with significantly reduced scatter. Additionally, the continuous strength method (CSM) was further extended for the flexural buckling design of extruded 7A04-T6 high-strength aluminium alloy SHS columns, and was shown to provide accurate and consistent resistance predictions. Reliability analyses of the codified and the proposed design methods were performed, confirming that the design proposals meet the target reliability indices except the Eurocode approach.
Highlights 12 tests on extruded 7A04-T6 high-strength aluminium alloy square hollow section columns under axial compression were carried out. The applicability and reliability of the current codified and relevant proposed design methods for columns to flexural buckling were evaluated. The continuous strength method was extended for design of columns undergoing flexural buckling.
Flexural buckling of extruded high-strength aluminium alloy SHS columns
https://orcid.org/0000-0002-3557-5627
https://orcid.org/0000-0001-9260-495X
Abstract The structural performance and design of extruded high-strength aluminium alloy square hollow section (SHS) columns were presented in this paper. A total of 12 extruded 7A04-T6 aluminium alloy SHS column specimens were tested under axial compression, together with tensile coupon tests and initial global geometric imperfection measurements. The flexural buckling failure mode and axial load versus end shortening and mid-height lateral deflection curves were reported. Based on validated finite element (FE) models, 480 numerical results were generated by means of parametric studies over a broad range of cross-section dimensions, member lengths, proof strengths and strain hardening exponents of the aluminium alloy material. The applicability of current design rules used for normal-strength aluminium alloy columns in European, Chinese and American standards to extruded 7A04-T6 high-strength aluminium alloy SHS columns was evaluated through comparisons with the test and FE results. The analysis results showed that the three standards consistently yielded conservative axial compression resistance predictions by about 9% for extruded 7A04-T6 high-strength aluminium alloy SHS columns. New flexural buckling curves with linear and nonlinear imperfection terms for the Chinese code, as well as modifications to the American specification, were separately proposed, resulting in improved accuracy with significantly reduced scatter. Additionally, the continuous strength method (CSM) was further extended for the flexural buckling design of extruded 7A04-T6 high-strength aluminium alloy SHS columns, and was shown to provide accurate and consistent resistance predictions. Reliability analyses of the codified and the proposed design methods were performed, confirming that the design proposals meet the target reliability indices except the Eurocode approach.
Highlights 12 tests on extruded 7A04-T6 high-strength aluminium alloy square hollow section columns under axial compression were carried out. The applicability and reliability of the current codified and relevant proposed design methods for columns to flexural buckling were evaluated. The continuous strength method was extended for design of columns undergoing flexural buckling.
Flexural buckling of extruded high-strength aluminium alloy SHS columns
https://orcid.org/0000-0002-3557-5627
https://orcid.org/0000-0001-9260-495X
Abstract The structural performance and design of extruded high-strength aluminium alloy square hollow section (SHS) columns were presented in this paper. A total of 12 extruded 7A04-T6 aluminium alloy SHS column specimens were tested under axial compression, together with tensile coupon tests and initial global geometric imperfection measurements. The flexural buckling failure mode and axial load versus end shortening and mid-height lateral deflection curves were reported. Based on validated finite element (FE) models, 480 numerical results were generated by means of parametric studies over a broad range of cross-section dimensions, member lengths, proof strengths and strain hardening exponents of the aluminium alloy material. The applicability of current design rules used for normal-strength aluminium alloy columns in European, Chinese and American standards to extruded 7A04-T6 high-strength aluminium alloy SHS columns was evaluated through comparisons with the test and FE results. The analysis results showed that the three standards consistently yielded conservative axial compression resistance predictions by about 9% for extruded 7A04-T6 high-strength aluminium alloy SHS columns. New flexural buckling curves with linear and nonlinear imperfection terms for the Chinese code, as well as modifications to the American specification, were separately proposed, resulting in improved accuracy with significantly reduced scatter. Additionally, the continuous strength method (CSM) was further extended for the flexural buckling design of extruded 7A04-T6 high-strength aluminium alloy SHS columns, and was shown to provide accurate and consistent resistance predictions. Reliability analyses of the codified and the proposed design methods were performed, confirming that the design proposals meet the target reliability indices except the Eurocode approach.
Highlights 12 tests on extruded 7A04-T6 high-strength aluminium alloy square hollow section columns under axial compression were carried out. The applicability and reliability of the current codified and relevant proposed design methods for columns to flexural buckling were evaluated. The continuous strength method was extended for design of columns undergoing flexural buckling.
Flexural buckling of extruded high-strength aluminium alloy SHS columns
Li, Beibei (author) / Wang, Yuanqing (author) / Zhang, Ying (author) / Meng, Xin (author) / Yuan, Huanxin (author) / Zhi, Xinhang (author)
Thin-Walled Structures ; 179
2022-06-27
Article (Journal)
Electronic Resource
English
Flexural buckling of fire exposed aluminium columns
| British Library Online Contents | 2009