群桩-厚筏板基础的简化计算方法
- 摘 要
-
(浙江大学建筑设计研究院,杭州 310027)[摘要]提出了一种群桩-土-筏板基础共同作用的有限元简化计算方法,计算时将筏板下的桩、土根据各自的非线性刚度简化成弹簧作用在筏板上,对厚筏板采用三维退化层合单元进行有限元计算,在保证精度要求下有效地减少了单元数和节点数。对一实际桩筏基础进行了计算和分析,用以指导优化设计,并把计算结果与等刚度法计算结果及实测值进行了比较,计算结果与实测比较吻合。[关键词]桩筏基础;三维退化层合单元法;共同作用Simplified calculation method of pile group-mass raft foundationJin Zhenfen, Gan Gang(Architecture Design & Research Institute of Zhejiang University, Hangzhou 310027, China)Abstract:It presents a simplified finite element calculation way for the piles-Raft-soil′s interaction. The calculation is under the way of simplifying the pile and soil′s individual nonlinear stiffness as the spring using on the raft. The degenerated 3-D laminated element is adopted by the mass raft foundation for the finite element calculation, which reduces the element and node numbers effectively under the condition of insuring the precision. The experiment calculates and analyzes the actual pile raft foundation for guiding and simplifying the design, and also in comparison with the three of calculation result, equal stiffness way result and actual numerical value. The result shows the comparison coincidently and proves this simplified way workably.Keywords:piles-raft foundation; degenerated 3-D laminated element method; interaction作者简介:金振奋,硕士,一级注册结构工程师,Email:jinzf@zuadr.com。参考文献[1]钱家欢,殷宗泽. 土工原理及计算(第二版)[M]. 北京:中国水利电力出版社,1996.[2]朱百里,沈珠江,等. 计算土力学[M]. 上海:上海科学技术出版社,1990.[3]王元汉,邱先敏,张佑启. 弹性地基板的等参有限元法计算[J]. 岩土工程学报,1998,20(4):7-11.[4]凌道盛,陈云敏,丁皓江. 任意基础板的有限元分析[J].岩土工程学报,2000(4).[5]王勖成,邵敏. 有限单元法基本原理和数值方法[M]. 北京:清华大学出版社,1998.