| 复合地基承载特性的弹塑性分析 |
| |
| 引用本文： | 刘杰,何杰,张可能.复合地基承载特性的弹塑性分析[J].工程地质学报(英文版),2003,11(3):244-249. |
| |
| 作者姓名： | 刘杰 何杰 张可能 |
| |
| 作者单位： | 1.株洲工学院土木工程系,株洲412008; |
| |
| 基金项目： | 湖南省教育厅基金资助项目 (编号 :0 1C347) |
| |
| 摘 要： | 对桩及承台采用线弹性有限元模型,对承台下桩周土采用弹塑性有限元模型,对群桩以外的土体采用线弹性无限元模型,在桩土接触面上设置接触面单元,利用三维弹塑性有限元对桩%D土%D承台相互作用进行了分析。得出了如下结论 :承台下桩顶反力总体表现出角桩最大,边桩次之,中桩最小的分布规律,随着作用在承台上的荷载增大,桩顶反力趋于均匀分布,承台下桩侧摩阻力是由桩端向桩顶逐渐发展的,承台对桩上部侧摩擦阻力存在削弱作用。为了验证本文方法的可行性,对承台下有九桩的情况进行了静载试验,将试验结果与本文计算结果进行了比较。
|
| 关 键 词： | 复合地基 相互作用 三维弹塑性有限元 无限元 承载特性 |
| 文章编号： | 1004-9665/2003/11(03)-0244-06 |
| 收稿时间： | 2002-12-05 |
| 修稿时间： | 2002年12月5日 |
ELASTIC -PLASTIC ANALYSIS ON BEARING LOAD CHARACTERISTICS ON COMPOSITE |
| |
| Institution: | 1.Department of Civil Engineering, ZhuZhou Institute of Technology, Zhuzhou 412008;2.College of Resources, Environment and Civil Engineering, Central South University, Changsha 410083 |
| |
| Abstract: | Using linear elastic finite element model for piles and pile cap, elastic-plastic finite element model for piles-surrounding soil under pile cap, linear elastic infinite element model for soil around pile group, and mounting interface element on the pile-soil interfaces, 3-D elastic-plastic finite element method is used to analyzing the pile-soil-cap interaction. It is found that under pile cap, the distribution law of the pile-top load is behaves as follow: the load exerted to the corner piles is largest to the side piles next, and to the middle pile lowest. The pile-top loads are uniformly distributed along with increasing load exerted on the pile cap, the skin friction of piles gradually develops from the pile-end towards the pile-top. The pile cap has a weakening effect on the skin friction of piles upside. To verify the results, a static load test on a nine pile group under pile cap performed. It is found that the obtained results from the proposed are matched for the results of the experimental test. |
| |
| Keywords: | Composite foundation interaction 3-D elastic-plastic finite element infinite element bearing load characteristics |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《工程地质学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《工程地质学报(英文版)》下载免费的PDF全文 |
|
