岩石破坏非连续变形分析弹脆性本构模型的二次开发

发布时间：2018-09-10 17:56

【摘要】：岩石非连续变形分析方法DDARF成功实现了模拟岩体裂纹萌生、扩展、贯通、破碎的全过程,但算法只考虑了岩体的线弹性本构模型,没有分析岩体的非线性应力-应变关系。为更符合真实岩体工程,同时扩展岩石非线性本构模型的应用范围,分别采用摩尔-库仑强度准则和最大拉应力强度准则对岩体进行剪切和拉伸破坏判断;对理想弹脆性本构模型进行算法分析,并在VC++平台下程序实现;对"自定义"的岩体非连续变形分析方法弹脆性本构模型与室内单轴压缩试验进行比较分析;将岩体非连续变形分析方法弹脆性本构模型应用于大型地下洞室开挖,并与线弹性本构模型进行对比。结果表明,非连续变形分析方法中自定义岩体弹脆性本构模型是可行的,它能够反映岩体变形的非线性特征,与室内试验吻合度较好;非连续变形分析方法弹脆性本构模型应用于大型地下工程,能更安全且真实地分析洞室围岩的稳定性,进而更好地指导地下洞室的防护措施。
[Abstract]:The discontinuous rock deformation analysis method DDARF successfully simulates the whole process of rock crack initiation, propagation, penetration and fracture, but the algorithm only considers the linear elastic constitutive model of rock mass, and does not analyze the nonlinear stress-strain relationship of rock mass. The Mohr-Coulomb strength criterion and the maximum tensile stress strength criterion are used to judge the shear and tensile failure of rock mass respectively; the algorithm of the ideal elastic-brittle constitutive model is analyzed and implemented in the VC++ platform; the self-defined elastic-brittle constitutive model for discontinuous deformation analysis of rock mass is compared with the laboratory uniaxial compression test. The results show that the self-defined elastic-brittle constitutive model of rock mass in discontinuous deformation analysis method is feasible, which can reflect the nonlinear characteristics of rock mass deformation and kiss with laboratory test. The elastic-brittle constitutive model of discontinuous deformation analysis method is applied to large-scale underground engineering, which can safely and truly analyze the stability of surrounding rocks of caverns, and then better guide the protection measures of underground caverns.
【作者单位】：山东大学岩土与结构工程研究中心;山东省国土测绘院;
【基金】：国家自然科学基金重点项目(No.51139004) 教育部博士点基金(No.20110131110030) 中国博士后科学基金面上项目(No.2012M521339) 山东省自然科学基金资助项目(No.ZR2011EL049)
【分类号】：TU452

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