复杂节理面剪切强度和变形特征的数值分析
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Release time:2020-08-09 Journal:中南大学学报(自然科学版) Place of Publication:中国 Funded by:40804027；200805331082；2008TP4013-2 Key Words:节理; 剪切强度; 变形特征; 数值分析 Abstract:采用FLAC3D软件建立三维节理试样模型,分析不同表面形态和边界条件对节理强度和变形特征的影响.研究结果表明:当节理面起伏角较小时,试样剪切强度与正应力之间符合Mohr-Coulomb线性关系,起伏角对内摩擦角的影响大于对黏结力的影响;随着起伏角的增大,剪切强度与正应力之间逐渐呈非线性关系特征;通过抛物线方程对其进行拟合,可得到较高的相关性,并且节理的破坏模式从滑移破坏转变为沿节理面滑移和锯齿压剪碎裂的复合破坏;峰值强度与残余强度之比随正应力的增大而逐渐减小,减小趋势符合指数规律,同时,试样的各向异性逐渐减弱,剪切刚度不断增大. Co-author:柳群义, 朱自强 First Author:周文 Indexed by:Applied Research Correspondence Author:冯德山 Document Code:1672-7207(2009)06-1700-03 Discipline:地质资源与地质工程 Document Type:J Volume:40 Issue:6 Page Number:1700-1704 ISSN No.:1672-7207 Translation or Not:no CN No.:43-1426/N Date of Publication:2009-12-26 Included Journals:EI -
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