Scholarlink

<p>The beams with web openings have different shapes of openings in the web of the beam. The cellular beams have circular openings; traditional castellated beams have hexagonal shapes, and Angelina beams have sinusoidal shape of openings. Nowadays, various other shapes of openings, such as elliptical, octagonal, square, rectangular, and filleted openings, are also being studied by researchers. In this study Indian Standard Medium Weight (ISMB300) section is chosen as the parent beam, and the beam with web openings is derived from this parent beam. It was evaluated the interaction between web-post buckling (WPB) and the vierendeel mechanism (VM) in ISMB 300 alveolar beams with five opening shapes (circular, hexagonal, octagonal, rectangular, and square). A validated 3D finite element model (ABAQUS shell model) is adopted and used in a parametric study with five web-post widths (w = 40–100&#xa0;mm) and opening width ratios a₀ = 1.1&#xa0;h–1.3&#xa0;h (h = 300&#xa0;mm). Results show that increasing the web-post width systematically increases ultimate capacity for all opening shapes. Among the investigated geometries, hexagonal openings provided the highest ultimate loads (e.g., 138–277 kN for w = 40–100&#xa0;mm), whereas square openings led to the lowest capacities (≈28–82 kN) and predominantly VM. Circular openings exhibited the lowest mid-span deflection at ultimate load for the same web-post width. The numerical results were compared with four analytical approaches: Lawson and Hicks [Lawson and Hicks in Design of Composite Beams with Large Web Openings, The Steel Constrution Institute, <a href="https://www.steelconstruction.info/images/e/e7/SCI_P355.pdf">https://www.steelconstruction.info/images/e/e7/SCI_P355.pdf</a>, 2011], Panedpojaman et. al [Panedpojaman et al. in Thin-Walled Struct 78:204-216. 10.1016/j.tws.2013.11.007, 2014], Ward [Ward in Design of composite and non-composite cellular beams. Ascot, UK: Steel Construction Institute, 1990], and BS EN 1993-1-13 [Eurocode 3-Design of steel structures Part 1-13: Beams with large web openings, 2024]. The comparisons indicate good agreement for circular openings—particularly with the Panedpojaman et. al [Panedpojaman et al. in Thin-Walled Struct 78:204-216. 10.1016/j.tws.2013.11.007, 2014] model and the Eurocode—while all methods showed limited accuracy for hexagonal and octagonal openings. Practical implications are provided to guide the choice of opening shape and minimum web-post width to avoid premature WPB/VM in design.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evaluation of web post-buckling and vierendeel mechanism in steel alveolar beams with five shapes of web openings: a numerical study

  • 期刊论文

  • 发表日期：

    2026年3月3日

查看全文
  • Ather Khan,
  • Carlos Humberto Martins,
  • Alexandre Rossi,
  • Samadhan G. Morkhade

摘要

The beams with web openings have different shapes of openings in the web of the beam. The cellular beams have circular openings; traditional castellated beams have hexagonal shapes, and Angelina beams have sinusoidal shape of openings. Nowadays, various other shapes of openings, such as elliptical, octagonal, square, rectangular, and filleted openings, are also being studied by researchers. In this study Indian Standard Medium Weight (ISMB300) section is chosen as the parent beam, and the beam with web openings is derived from this parent beam. It was evaluated the interaction between web-post buckling (WPB) and the vierendeel mechanism (VM) in ISMB 300 alveolar beams with five opening shapes (circular, hexagonal, octagonal, rectangular, and square). A validated 3D finite element model (ABAQUS shell model) is adopted and used in a parametric study with five web-post widths (w = 40–100 mm) and opening width ratios a₀ = 1.1 h–1.3 h (h = 300 mm). Results show that increasing the web-post width systematically increases ultimate capacity for all opening shapes. Among the investigated geometries, hexagonal openings provided the highest ultimate loads (e.g., 138–277 kN for w = 40–100 mm), whereas square openings led to the lowest capacities (≈28–82 kN) and predominantly VM. Circular openings exhibited the lowest mid-span deflection at ultimate load for the same web-post width. The numerical results were compared with four analytical approaches: Lawson and Hicks [Lawson and Hicks in Design of Composite Beams with Large Web Openings, The Steel Constrution Institute, https://www.steelconstruction.info/images/e/e7/SCI_P355.pdf, 2011], Panedpojaman et. al [Panedpojaman et al. in Thin-Walled Struct 78:204-216. 10.1016/j.tws.2013.11.007, 2014], Ward [Ward in Design of composite and non-composite cellular beams. Ascot, UK: Steel Construction Institute, 1990], and BS EN 1993-1-13 [Eurocode 3-Design of steel structures Part 1-13: Beams with large web openings, 2024]. The comparisons indicate good agreement for circular openings—particularly with the Panedpojaman et. al [Panedpojaman et al. in Thin-Walled Struct 78:204-216. 10.1016/j.tws.2013.11.007, 2014] model and the Eurocode—while all methods showed limited accuracy for hexagonal and octagonal openings. Practical implications are provided to guide the choice of opening shape and minimum web-post width to avoid premature WPB/VM in design.