李丽华,屠娴哲,刘帅帅,黄少平,周鑫隆

• 1:湖北工业大学土木建筑与环境学院
• 2:湖北省生态道路工程技术研究中心

摘要(Abstract)：

为探究加筋角度与结构剪切特性之间的关系，采用大型循环剪切仪开展多角度土工格栅加筋土循环剪切试验，探究加筋角度和循环荷载对加筋细粒含量土剪切特性的影响，分析循环剪切过程中及加筋循环后直剪加筋细粒含量土的剪切性能变化。结果表明：不同角度土工格栅加筋细粒含量土剪切应力具有差异性，单向直剪试验中，30°加筋角度下，加筋细粒含量土剪切强度最大；法向应力为300 kPa时，6种角度(30°、60°、90°、120°、150°、180°)加筋界面均呈现循环剪切硬化的特征，180°加筋角度下，循环剪切应力峰值最大；剪切应力和剪切刚度随循环次数呈正相关关系，界面阻尼比随循环周期发展变化趋于平缓；不同循环幅值和法向应力下，30°加筋角度下细粒含量土呈现弱剪切硬化现象，随循环幅值或法向应力增加，土工格栅开始受力拉动上下土体，剪切应力增幅提高。

关键词(KeyWords)： 加筋角度;循环剪切特性;抗剪强度;直剪试验;加筋细粒含量土

Abstract:

Keywords:

基金项目(Foundation): 武汉市应用基础前沿项目(2020020601012278);; 国家自然科学基金项目(52108315);; 湖北工业大学杰出人才基金项目(XJ2021000501)

作者(Author): 李丽华,屠娴哲,刘帅帅,黄少平,周鑫隆

DOI: 10.13928/j.cnki.wrahe.2022.09.019

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