Flexural behaviour of 7A04-T6 high-strength aluminium alloy SHS and RHS beams under moment gradient

Li, Beibei; Wang, Yuanqing; Zhang, Ying; Yuan, Hongyong; Zhi, Xinhang; Baniotopoulos, Charalampos

doi:10.1016/j.engstruct.2022.114138

Cited by 17 publications

(3 citation statements)

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“…The suggested formula was applied to compute an enhanced ultimate strength resistance capacity for square hollow section (SHS) columns. Here, Nu, ENprop represents the anticipated ultimate capacity derived from equation (4), utilizing a ϕ value calculated by the proposed equation (7).…”

Section: The Recommended Formulamentioning

confidence: 99%

“…The increased ultimate strengths of 7xxxseries aluminum alloys contribute to a reduction in cross-section dimensions, leading to lighter structural member weights. This, in turn, accelerates construction speed and eliminates the need for impractical extrusion processes for exceptionally large cross-section members [7]. In actual structures, the existence of a perfectly axially loaded column is rare, as there is typically a slight eccentricity that can impact the column's instability behavior.…”

Section: Introductionmentioning

confidence: 99%

“…Presently, the maximum ultimate strength of commonly used aluminum alloys in the construction industry is limited to a nominal yield strength (f0.2) of 350 MPa, as stipulated by internationally recognized design regulations [3]- [6]. As structural engineering progresses towards accommodating large spans, intricate designs, and heavy loads, coupled with the pressing need for quickly assembled temporary structures during unforeseen natural disasters or public health crises, there is an emerging demand for enhanced performance from aluminum alloy materials [7]. Aluminum alloys belonging to the 7xxx series, including 7A04-T6 and 7075-T6, typically exhibit elevated yield strengths, reaching around 550 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the buckling behavior of square hollow columns fabricated from 7A04-T6 aluminum alloy through numerical analysis.

Bashir,

Rong

2024

Preprint

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This research employed ANSYS 17 finite element analysis software to numerically consider the investigation of the buckling behavior of columns made from square hollow sections (SHS) composed of aluminum alloy. A validated modeling with nonlinear finite elements was created through column pin-ended tests. The column samples were manufactured using heat-treated aluminum alloys of 7A04-T6. In the finite element model, geometric and material non-linearities were accounted for. Its accuracy was validated through a comparison of the model's results with experimental conditions. A thorough parametric analysis was carried out to explore the impact of fillet radii, cross-sectional slenderness, meshing size, and member slenderness on the stability of columns. The research juxtaposed experimental and numerical results with design strength parameters from various codes, including Chinese, European, American, and Australian/New Zealand standards. Additionally, alternative design approaches such as the direct strength technique and continuous strength method were considered for comparison. The test results indicated that the Direct Strength Method (DSM), Australian/New Zealand Standard (AUS/NZS), and Continuous Strength Method (CSM) overestimated the actual strength of the columns by 57.73%, 18.34%, and 15.21%, respectively. Conversely, the European, Chinese, and American codes underestimated the strength by 23.60%, 17.40%, and 9%, respectively. Upon examining the numerical data, it was evident that the actual strength of the columns was underestimated by 47.48%, 10.99%, and 7.99% when employing the Direct Strength Method (DSM), Australian/New Zealand Standard (AUS/NZS), and Continuous Strength Method (CSM), respectively. Similarly, the European (EN), Chinese (GB), and American (AA) methods underestimated the strength by 32.80%, 24.30%, and 15.70%, respectively. The majority of existing design guidelines and approaches tend to be conservative in forecasting the ultimate strength of columns made of 7A04-T6 aluminum alloy under eccentric stress. To improve accuracy, a modified formula predicated on the Eurocode was suggested, adjusting various factors for more precise predictions of the ultimate strength of columns made of 7A04-T6 aluminum alloy.

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Section: The Recommended Formulamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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