静力触探工作特性的大变形弹塑性数值分析  

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

作　　者：李波[1,2] 栾茂田[2] 

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岩土工程研究所,大连116024

出　　处：《武汉理工大学学报》2009年第8期94-97,128,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金资助项目(50179006);教育部跨世纪优秀人才培养计划研究基金(教技函[1998]2号)

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,探讨了探头的尺寸效应,并对比分析了分别基于大小应变定义的各响应分析结果。结果表明:在其他条件相同的情况了,锥体面积的增加会导致锥头阻力的降低;大应变理论在锥尖处周围土体内的各应力响应有骤增现象明显,且径向位移分布与基于小应变的解答差异明显。The finite software ABAQUS is applied to analyze the stress and displacement field around the cone tip and along the cone shaft, considering the properties of both the large strain and shear dilatation of soil body respectively due to the penetration of the cone penetrometer. The effects of the cone diameter on the various responses in the soil are also discussed. Moreover, this paper carried out the comparative analysis for the results respectively based on large strain and small strain. The research results show that the increase of cone cross-section area will cause the decrease of the cone resistance; in the case of large strain, the stresses in the soil around the cone tip have an obviously sudden increase, and the radial displacement is less than one from small stain.

关 键 词：静力触探 大变形 探头尺寸效应 数值模拟 

分 类 号：TU352[建筑科学—结构工程]