土工基础

›› 2013, Vol. 27 ›› Issue (6): 55-58.

• 工程实录 • 上一篇    下一篇

上部结构-筏板-地基相互作用的有限元分析

范丽佳，张 亮，郭小刚，王 敏   

  1. (湘潭大学 土木工程与力学学院,湖南湘潭 411105)
  • 收稿日期:2013-01-09 出版日期:2013-12-20 发布日期:2013-12-21
  • 作者简介:范丽佳（1986-），女，湘潭大学硕士研究生，研究方向为土与结构的相互作用。

The Finite Element Analysis of Interaction among Raft-Foundation-Soil and Superstructure

FAN Lijia, ZHANG Liang, GUO Xiaogang, WANG Min   

  1. (College of Civil Engineering and Mechanics，Xiangtan University，Xiangtan Hunan 411105)
  • Received:2013-01-09 Online:2013-12-20 Published:2013-12-21

摘要： 重点研究了空间框架-筏板-地基共同作用时上部框架及筏板基础的受力和变形性能，选用合适的三维空间计算模型，应用有限元仿真软件ANSYS程序对所建立的模型进行分析。设置不同刚度的三种地基模型，探讨其变化对上部框架及筏板基础的影响。计算结果表明：不同刚度的地基作用对上部框架及筏板的沉降差影响并不大，但是对筏板的沉降影响大，内部应力也将会发生重新分布。同时得出地基土应力变化特征，对结构设计的安全性及经济性提供依据。

关键词: 空间框架, 筏板, 地基, 共同作用, 数值模拟

Abstract: This paper presents the stress and strain distributions within the structural frames and raft foundation by considering the interactions among the three dimensional frame, raft foundation and foundation soils. The nonlinear properties of the materials are simulated with threedimensional finite element software ANSYS. Three types of foundation soil stiffness are assumed in the analyses in order to investigate its impact on the frame and raft structures. The numerical analysis results indicate that the soil stiffness has little impact on the differential settlement of the frames and rafts but it has large on the total settlement of the raft foundation. The stress distribution pattern will change if the stiffness of the foundation soils changes. The stress distribution of the foundation soils can also be obtained from the analysis and can be utilized in the safe structural design. 

Key words: 3D Frame Structure, Raft Foundation, Foundation Soils, Interactions, Numerical Simulation