Scholarlink

<p>The influence of size effects on the shear strength and stiffness of glued-laminated timber (GLT) made from European ash (<i>Fraxinus excelsior</i> L.) was assessed based on a comprehensive experimental campaign. The experiments were performed on full-scale GLT beams with rectangular cross-sections width × height = <i>b</i> × <i>h</i> = 120 × 480-800 mm<sup>2</sup>, shear lengths <i>L</i><sub>v</sub> = 720-1500&#xa0;mm, and ratios between the shear length <i>L</i><sub>v</sub> and the beam height <i>h</i>, i.e. <i>α</i> = <i>L</i><sub>v</sub>/<i>h</i> = 1.2-2.5. The influence of the test configuration (3-point bending and asymmetric 4-point bending) was also assessed. The obtained shear strengths of European ash GLT had mean values <i>f</i><sub>v, mean</sub> = 10.2&#xa0;N·mm<sup>-2</sup> (coefficient of variation <i>CoV</i><sub>fv</sub> = 14%) and 12.2&#xa0;N·mm<sup>-2</sup> (<i>CoV</i><sub>fv</sub> = 15%), for the 3-point and asymmetric 4-point bending test configurations, respectively. The shear strength showed some size dependency, with an exponent 1/<i>m</i> = 0.2 0.4 for a strength modification factor (600/<i>h</i>)<sup>1/<i>m</i></sup> as a function of the beam height <i>h</i>. The shear modulus showed no size dependency and the obtained mean values were <i>G</i><sub>mean</sub> = 1162&#xa0;N∙mm<sup>-2</sup> (<i>CoV</i><sub>G</sub> = 6%) and 1120&#xa0;N∙mm<sup>-2</sup> (<i>CoV</i><sub>G</sub> = 6%), for the 3-point and asymmetric 4-point bending tests, respectively.</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

Shear strength and stiffness of glued-laminated timber made from European ash (Fraxinus excelsior L.)

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月13日

查看全文
  • Pedro Palma,
  • René Steiger,
  • Thomas Strahm,
  • Ernst Gehri

摘要

The influence of size effects on the shear strength and stiffness of glued-laminated timber (GLT) made from European ash (Fraxinus excelsior L.) was assessed based on a comprehensive experimental campaign. The experiments were performed on full-scale GLT beams with rectangular cross-sections width × height = b × h = 120 × 480-800 mm2, shear lengths Lv = 720-1500 mm, and ratios between the shear length Lv and the beam height h, i.e. α = Lv/h = 1.2-2.5. The influence of the test configuration (3-point bending and asymmetric 4-point bending) was also assessed. The obtained shear strengths of European ash GLT had mean values fv, mean = 10.2 N·mm-2 (coefficient of variation CoVfv = 14%) and 12.2 N·mm-2 (CoVfv = 15%), for the 3-point and asymmetric 4-point bending test configurations, respectively. The shear strength showed some size dependency, with an exponent 1/m = 0.2 0.4 for a strength modification factor (600/h)1/m as a function of the beam height h. The shear modulus showed no size dependency and the obtained mean values were Gmean = 1162 N∙mm-2 (CoVG = 6%) and 1120 N∙mm-2 (CoVG = 6%), for the 3-point and asymmetric 4-point bending tests, respectively.