颗粒大小和元素特性的作用在沙土纹理表面接口的剪切反应
Mu'ath I Abu Qamar1, Azhar G Hamad2, Ammar A Alshannaq3
1Department of Civil Engineering, Yarmouk University, Irbid, 21163, Jordan. abuqamar.muath@yu.edu.jo.
Scientific reports
|November 27, 2025
概括
结构化表面增强了基础元素的剪切阻力. 关键比率,元素高度与粒子直径 (h/D50) 和距离与高度 (S/h),量化接口行为,粒子大小效应在较小的比率下减小.
科学领域:
- 地质技术工程 地质技术工程
- 土壤力学 土壤力学
- 材料科学 材料科学 材料科学
背景情况:
- 了解界面上的剪切行为对于地质技术结构至关重要.
- 创新的表面,如生物灵感或结构化的设计,提供了与传统接口相比,更好的剪切抵抗的潜力.
- 诸如土壤特性,粒子大小和表面几何等参数显著影响接口剪切行为.
研究的目的:
- 研究表面几何和土壤颗粒大小对土壤界面剪切行为的影响.
- 确定诸如元素高度与平均粒子直径比 (h/D50) 和元素间距与高度比 (S/h) 这样的参数如何影响剪切阻力.
- 探索沙粒大小与纹理表面上调动的剪切强度之间的关系.
主要方法:
- 进行了一系列接口直接剪切测试.
- 利用了七种不同颗粒大小的沙子.
- 采用了四个表面:一个光滑的,三个纹理的,带有梯形状的元素.
主要成果:
- 剪切阻力随着h/D50的增加而降低,而对于纹理表面,随着S/h的增加而增加.
- h/D50和S/h比率有效地捕获了接口负载传输机制.
- 沙粒大小对剪切阻力的影响随着h/D50和S/h的下降而减少.
- 当沙子的平均粒子直径 (D50) 与纹理表面的元素高度密切匹配时,就能达到最佳的剪切强度.
结论:
- 表面几何,特别是h/D50和S/h比率,在决定土壤纹理接口的剪切行为方面发挥着关键作用.
- 结构表面在增强剪切阻力的有效性取决于表面元素尺寸和土壤颗粒大小之间的相互作用.
- 在纹理表面上距离较近的元素可以最大限度地减少颗粒大小的影响,同时将元素高度与颗粒大小相匹配可以最大限度地提高剪切强度.
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