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群樁-厚筏板基礎(chǔ)的簡(jiǎn)化計(jì)算方法
金振奮,干鋼
摘 要
(浙江大學(xué)建筑設(shè)計(jì)研究院,杭州 310027)
[摘要]提出了一種群樁-土-筏板基礎(chǔ)共同作用的有限元簡(jiǎn)化計(jì)算方法,計(jì)算時(shí)將筏板下的樁、土根據(jù)各自的非線性剛度簡(jiǎn)化成彈簧作用在筏板上,對(duì)厚筏板采用三維退化層合單元進(jìn)行有限元計(jì)算,在保證精度要求下有效地減少了單元數(shù)和節(jié)點(diǎn)數(shù)。對(duì)一實(shí)際樁筏基礎(chǔ)進(jìn)行了計(jì)算和分析,用以指導(dǎo)優(yōu)化設(shè)計(jì),并把計(jì)算結(jié)果與等剛度法計(jì)算結(jié)果及實(shí)測(cè)值進(jìn)行了比較,計(jì)算結(jié)果與實(shí)測(cè)比較吻合。
[關(guān)鍵詞]樁筏基礎(chǔ);三維退化層合單元法;共同作用
Simplified calculation method of pile group-mass raft foundation
Jin 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
作者簡(jiǎn)介:金振奮,碩士,一級(jí)注冊(cè)結(jié)構(gòu)工程師,Email:jinzf@zuadr.com。
參考文獻(xiàn)
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[2]朱百里,沈珠江,等. 計(jì)算土力學(xué)[M]. 上海:上??茖W(xué)技術(shù)出版社,1990.
[3]王元漢,邱先敏,張佑啟. 彈性地基板的等參有限元法計(jì)算[J]. 巖土工程學(xué)報(bào),1998,20(4):7-11.
[4]凌道盛,陳云敏,丁皓江. 任意基礎(chǔ)板的有限元分析[J].巖土工程學(xué)報(bào),2000(4).
[5]王勖成,邵敏. 有限單元法基本原理和數(shù)值方法[M]. 北京:清華大學(xué)出版社,1998.
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