横观各向同性软土地基上大圆筒防波堤稳定性研究
摘要:对于横观各向同性软土地基上沉入式大圆筒防波堤结构提出了一种准三维上限极限分析方法,所假设的破坏机制为大圆筒结构绕筒体内中轴线上某点发生转动失稳,泥面处形成楔体破坏,而筒底部形成圆弧滑裂面。本方法可以考虑土的三轴压缩、拉伸强度与直剪强度的差异。利用ABAQUS分别进行平面应变以及三维有限元分析,软土采用Hill本构模型,所得到的破坏模式以及大圆筒结构水平承载力与上限极限分析方法吻合较好,同时可以得出考虑地基土各向异性的大圆筒结构承载力比不考虑时有较大降低。
Abstract:A semi-three-dimensional plastic limit analysis method of the buried large diameter cylindrical breakwater in crossanisotropic soft rail is presented assuming conditions of rotational symmetry about the vertical axis. The failure mechanism assumed is that wedge(s) near the mudline and an arc slip surface at the base of the cylinder are formed when the cylinder structure overturns, rotating around a point which is on the synunetry axis of the cylinder. The method can allow for the different soil strengths in triaxial compression, extension and simple shear. This problem is also analyzed by plane strain FE and three dimensional FE, in which the soil employs a Hill yield criterion. All FE analyses are done through ABAQUS. The failure mechanism assumed and the plastic limit analysis predictions are validated by finite element analysis. The results indicate that the capacity of the structure, allowing for the soil's anisotropy, reduces considerably.
中文标题：
横观各向同性软土地基上大圆筒防波堤稳定性研究
Study on the Stability of Large Diameter Cylindrical Breakwater in Cross-anisotropic Soft Soil
作者：
范庆来1,魏峰先2,陈彦明3
Fan Qinglai1,Wei Fengxian2,Chen Yanming3
作者简介:范庆来,1977年生,男,汉族,山东栖霞人,博士研究生,主要从事岩土力学基本理论与数值分析、海洋土力学等方面的研究工作。
通讯地址：
1. 大连理工大学土木水利学院岩土工程研究所, 辽宁大连 116024; 2. 建设综合勘察研究设计院, 北京 100007; 3. 山西晋达交通建设工程监理有限公司, 山西太原 030012
1.InstituteofGeotechnicalEngineering,SchoolofCivilandHydraulicEngineering,DalianUniversityofTechnology,DalianLiaoning116024China; 2.ChinaInstituteofGeotechnicalInvestigationandSurveying,Beijing100007China; 3.CompanyofJINDATrafficConstructionEngineeringSupervising,TaiyuanShanxi030012China
中图分类号:TU311.4
出版物：岩土工程技术
收稿日期:2005-10-09
关键词:横观各向同性,大圆筒防波堤结构,上限极限分析,软土地基,有限元分析
Key words:cross-anisotropy,large diameter cylinder structure,plastic limit analysis,soft foundation,FE analysis
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