摘要
研究目的:基于地基基础与上部结构的共同协调作用,考虑地基基础变形对上部结构受力与变形的影响,及上部结构对基础内力和变形的作用,研究大型筏形基础的设计。研究方法:借助于大型有限元计算程序M IDAS,建立地基、基础及上部结构的三维空间模型,采用弹性地基梁法,用弹簧模拟地基作用,对整个结构进行计算分析。研究结果:从计算结果可以看出,考虑地基、基础和上部结构的共同作用,计算所得筏板基础的沉降规律及内力分布规律与筏板实际变形及受力情况相吻合。研究结论:将地基、基础和上部结构结合起来,考虑三者的相互作用、相互影响,根据共同作用的计算结果进行筏形基础设计的方法是可行的。
Research purposes： It is necessary to make research on the design of large - sized raft foundation because of the interaction of ground, raft foundation and structure, the influences on the stress and deformation of upper structure by the deformation of subgrade foundation, and the effect on the internal force and deformation of foundation by upper structure.
Research methods：The calculation and analysis were made for the entire structure by adopting three -dimensional space model for subgrade, foundation and upper structure with the aid of large finite element MIDAS program and elastic foundation beam method to simulate the effect on the foundation with spring.
Research results：The calculation results show that the computed settlement regulation and distribution regulation of internal force of raft foundation are matched with the actual deformation and stress of raft foundation.
Research conclusions：The analysis results show it is feasible to design a raft foundation by taking the interaction of subgrade, raft foundation and structure into account.
出处
《铁道工程学报》
EI
北大核心
2007年第4期20-23,共4页
Journal of Railway Engineering Society
关键词
筏形基础设计
共同作用
弹性地基梁
Winkler假定
raft foundation design
interaction of subgrade, foundation ＆ structure
elastic foundation beam
Winkler hypothesis
