定法向刚度下结构面剪切力学行为数值分析  

Numerical Analysis of Shear Mechanical Behavior of Joint Subjected to Constant Normal Stiffness

作　　者：尹颖[1] 吴继敏[1] 杜金新 

机构地区：[1]河海大学地球科学与工程学院,南京市210098 [2]宁波市水利水电规划设计研究院,浙江宁波315192

出　　处：《勘察科学技术》2011年第2期6-10,16,共6页Site Investigation Science and Technology

基　　金：国家自然科学基金(No:50539110)

摘　　要：研究岩体结构面的力学性质对评价岩体工程的稳定性具有重要意义。根据Patton剪胀公式并结合ABAQUS软件中接触面滑动判定法则推导出定法向刚度下规则锯齿刚性结构面的剪胀公式,同时建立了相应的数值模型,两者计算结果一致。按锯齿倾角和法向刚度建立了16种结构面剪切模型,对各种模型的剪切位移曲线进行了分析,提出了一个参数:变形影响比。结果表明,变形影响比越大,锯齿变形承担的剪切位移越多。根据Seidel和Haberfield的试验建立相应的数值模型,计算结果与试验数据有较好的一致性,验证了ABAQUS在模拟粗糙结构面剪切方面的适用性。It is important to study the mechanical properties of rock joint to evaluate the stability of rock mass engineering.According to Patton shear dilatancy formula and contact surface sliding judgement rule with ABAQUS software,the shear dilatancy formula of regular serrated rigid joint subjected to constant normal stiffness is derived and the corresponding numerical models are established.The calculation results of numerical models and theoretical formula are in agreement.The 16 different shear models are established based on the different serrated angle and normal stiffness.Shear stress—displacement curves are analyzed and influence ratio of deformation is presented.The results show that the larger the ratio is,the more shear displacement the serrated deformation will subject to.On the basis of Seidel and Haberfield test,the corresponding numerical models are established and the calculation results are in agreement too,which prove that ABAQUS software in simulating the shear behavior of rough joint is feasible.

关 键 词：粗糙结构面 定法向刚度 剪切强度 数值模型 

分 类 号：TU45[建筑科学—岩土工程]