静力触探工作特性的参数化大变形弹塑性数值分析  

Parametric Elestic-plastic Numerical Analysis for the Cone Penetration Test Considering Large Strain

作　　者：李波[1,2] 王铁良[1] 栾茂田[2] 孙殿晖 

机构地区：[1]沈阳农业大学水利学院,沈阳110161 [2]大连理工大学土木水利学院,辽宁大连116024 [3]沈阳蒲河新城科技局,沈阳110164

出　　处：《沈阳农业大学学报》2009年第1期67-70,共4页Journal of Shenyang Agricultural University

基　　金：国家自然科学基金项目(50179006)

摘　　要：以有限元软件ABAQUS为分析工具,考虑土体剪胀性质和大变形特性,数值模拟静力触探探入后周围土体内的响应,探讨了土体工程特性参数的变化对探头周围土体内各响应的影响。分析结果表明:在相同扩张压力情况下,改变各分析参数的取值,随着弹性模量的增大,径向位移具有减小的趋势,但其改变对应力的影响不明显;剪胀角只对半倍锥径范围内土体的位移和应力产生影响;内摩擦角和黏聚力对位移和应力影响均很显著。The finite software ABAQUS is applied to comparatively analyze the stress and displacement field around the cone tip and along the cone shaft under different soil property parameters, considering the properties of both the large strain and shear dilatation of soil body respectively due to the penetration of the cone penetrometer. The effect of certain parameter on the stress and displacement was analyzed in the soil under the same expanding force by changing the value of this parameter. The research results showed that the radial displacement decreased with the increase of elastic modulus, but a little effect on the stresses. Effect of dilatancy angle on the different responses in the soil was just within the range of half cone radius from cone tip. The effects of both cohesion and frictional angle on the displacements and stresses were all obviously.

关 键 词：静力触探 土性参数 大变形 数值模拟 

分 类 号：O176[理学—数学] S157.1[理学—基础数学]