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中文摘要：
旨在提出考虑胶结厚度影响的三维胶结接触模型,并用于结构性砂土宏观力学特性的离散元模拟。首先,结合结构性砂土内胶结物质的力学性质与存在形式,通过简化水泥胶结铝棒接触力学特性的实测结果,提炼出用于模拟结构性砂土颗粒间胶结作用的三维胶结接触模型;其次,将该胶结模型植入三维离散元商业软件PFC3D,进行拉伸、压缩以及剪切试验的双球验证;最后,使用PFC3D对2%水泥含量的胶结砂土在不同围压条件下的三轴压缩试验进行模拟。结果表明:引入胶结接触模型的离散元数值试验可以较好地反映室内试验中胶结砂土的宏观力学特性。
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