Research on the Axial Compression Performance of Double C-Section Partially Encased Composite Columns.
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| Title: | Research on the Axial Compression Performance of Double C-Section Partially Encased Composite Columns. |
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| Authors: | Zhou, Ming1 (AUTHOR), Qin, Linglin1,2 (AUTHOR), Wen, Xiaodong1 (AUTHOR) wenxiaodong0420@163.com, Wang, Feifan1,2 (AUTHOR), Weng, Gongwei2 (AUTHOR) |
| Source: | Materials (1996-1944). May2026, Vol. 19 Issue 10, p1931. 28p. |
| Subjects: | Cold-formed steel, Compression loads, Axial stresses, Iron & steel columns, Finite element method |
| Abstract: | To investigate the axial compressive behavior of double C-section partially encased composite (DCPEC) columns, 10 DCPEC specimens and two back-to-back bare steel C-section specimens were designed and tested under axial compression. The effects of key parameters, including steel wall thickness, member slenderness ratio, connection type of the built-up double C-sections and connection density, on the failure mode, load–displacement response and ultimate load-carrying capacity were examined. The test results showed that, under otherwise identical conditions, the ultimate load of the bolted stub column was 8.4% higher than that of the welded stub column. When the steel wall thickness increased from 2.0 mm to 3.0 mm, the ultimate load increased by approximately 16%. In contrast, when the slenderness ratio increased from 25.98 to 41.57, the ultimate load decreased by approximately 30%. A finite element model was then established in ABAQUS and validated against the experimental results. The numerical analysis further confirmed that increasing the slenderness ratio reduced the axial load-carrying capacity, whereas increasing the steel wall thickness improved the resistance of the member. The results indicate that the proposed DCPEC column can effectively develop the composite action between cold-formed thin-walled steel and lightweight aggregate concrete, thereby improving axial resistance and showing promising potential for engineering applications. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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