学术
超长摩擦桩承载性状的有限元法
张齐兴[1,2] 姚波[3] 俞中奇[3]
[1]河海大学农业工程学院,江苏南京210098 [2]河海大学岩土工程研究所,江苏南京210098 [3]湖州市港航管理局,浙江湖州313000
摘 要:
基于三维有限元法，探讨了超长摩擦桩的数值模拟方法，分析了桩土界面单元、地基土单元模型参数对数值计算结果的影响．计算分析结果表明，桩周薄单元和地基土单元的模型参数对超长摩擦桩承载性状的影响很大，若均采用邓肯-张E-v模型，抗剪强度指标、密度对桩顶极限荷载影响显著，而模量参数主要影响荷载-沉降曲线的斜率及极限荷载时的桩顶沉降量．[著者文摘]
文章出处:
《河海大学学报：自然科学版》-2007年35卷6期 -681-685页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-1980（2007）06-0681-05
FEM for analysis of bearing behaviors of over-length friction piles
ZHANG Qi-xing ,YAO Bo, YU Zhong-qi （1. College of Agricultural Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute of Hohai University, Nanjing 210098, China; 3. Port-shipping and Management Bureau of Huzhou City, Huzhou 313000, China）
Abstract:
The numerical simulation methods for over-length friction piles were discussed by use of 3D FEM, and the influences of the model parameters for soil-pile interface elements and foundation soil elements on the numerical results were analyzed. The results show that the model parameters for thin-layer interface elements an are of great influences on the bearing behavior of over-length friction piles. If Duncan ＆ Chang d foundation soil elements ＇s E-v model was adopted to simulate the foundation soil element and thin-layer interface element, the shear strength index and density of foundation soil are of evident effects on the ultimate load at the top of piles, while the modulus parameters mainly affect the slope of the load-settlement curve and the settlement at the top of piles under ultimate load.[著者文摘]
Key words:
over-length friction pile; FEM; pile-soil coaction; nonlinearity of pile-soil deformation; Duncan-Chang model
更多>>免费文章
cqvip.com