考虑结构刚度效应的筏基完全共同作用体系分析

崔春义; 栾茂田; 杨庆

doi:10.13204/j.gyjz200701015

考虑结构刚度效应的筏基完全共同作用体系分析

doi: 10.13204/j.gyjz200701015

1.
大连理工大学海岸和近海工程国家重点实验室土木水利学院大连 116011

基金项目:

国家自然科学基金资助项目(批准号:50579006,50179006);教育部跨世纪优秀人才培养计划研究基金资助项目(教技函[1998]2号)

详细信息

作者简介:
崔春义男 1978年 5 月出生博士研究生 Email:cuichunyi11@ 126. com

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- 被引次数: 0
出版历程
- 收稿日期: 2006-05-12
- 刊出日期: 2007-01-20

NUMERICAL ANALYSIS OF ENTIRE INTERACTIVE SYSTEM OF RAFT FOUNDATION CONSIDERING STRUCTURAL STIFFNESS EFFECT

1.
State Key Laboratory of Coastal and Offshore Engineering,School of Civil and Hydraulic Engineering,Dalian University of Technology Dalian 116011

摘要

摘要: 筏板基础作为软土地基上高层结构的一种重要基础形式,在工程实践中得到了广泛应用。合理考虑上部结构、筏板与地基的共同作用效应具有现实意义。然而目前大多数研究仅限于二维分析,在工程设计中所采用的常规方法尚无法考虑共同作用效应。为此,在考虑地基的弹塑性性质与上部结构及筏板的刚度效应的基础上,在对上部结构、筏板基础与地基三者所组成的共同作用体系进行整体三维空间有限元数值分析。分析结果表明:当考虑三维空间效应时,上部结构和筏板基础的刚度对基础自身内力与变形具有显著的影响,并呈现不同的特征与趋势,但是这种影响具有一定的有限性。同时共同作用所引起的次应力效应、荷载分担转移等效应在工程设计中应予以合理地反映。
- 筏板基础 /
- 共同作用 /
- 上部结构 /
- 次应力
Abstract: Raft foundations are widely empolyed for high-rise buildings or multi-rise structures founded on soft ground.Therefore the interaction of superstructure,raft foundation and subsoil gets to be considerably significant in the analysis and design of major structures on soft ground with raft foundation.In actual,the conventional methods in engineering design cannot duly reproduce the interaction mechanism of the system and cannot accurately predict the variation characteristics of both internal forces and deformations of raft foundation.At the same time,the 2-D numerical analysis of interaction system cannot manifest the three-dimensional effect of the interaction.Therefore,both the elasto-plastic behaviour and the contributions of stiffness of superstructure and raft foundation are considered and three dimensional numerical analyses of interaction system consisting of superstructure,raft foundation and subsoil are conducted by using FEM.Through the comparactive studies,it is shown that while the spatial effect is taken into consideration,the stiffness of both superstructure and raft foundation has a definite effect on both internal forces and deformations of interaction system with different characteristics.However such an effect is limited to a certain extent.Furthermore,the effect of second stress and the transferring of loading sharing of superstructure cannot be overlooked in engineering design.
- raft foundation /
- interaction /
- superstructure /
- second stress

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参考文献(11)

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