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论文类型：期刊论文

发表时间：2008-05-01

发表刊物：COMPUTERS AND GEOTECHNICS

收录刊物：SCIE、EI

卷号：35

期号：3

页面范围：372-382

ISSN号：0266-352X

关键字：penetration; large displacement analysis; interpolation; foundation; bearing capacity

摘要：The Remeshing and Interpolation Technique with Small Strain (RITSS) approach has been developed to deal with 3-D geotechnical problems in this paper. Unstructured 20-node hexahedral element is found to work well for predicting collapse loads accurately for 3-D undrained geotechnical problems involving material incompressibility. Remeshing is automatically accomplished by ANSYS program. With remeshing and interpolation, small fluctuations appear in the load-deformation results. In order to minimize these fluctuations, different increment sizes and remeshing frequencies are explored. Meanwhile, various 3-D interpolation methods are compared, and the unique element division method is found to work best. The results of two numerical applications are presented for a 3-D strip footing penetrating deeply into uniform clay and a square foundation into normally consolidated clay. The computed bearing capacity responses are compared with other numerical or conventional results. The results show that the present method is accurate and efficient for 3-D large displacement foundation penetration problems. (c) 2007 Elsevier Ltd. All rights reserved.