| 预应力锚索锚固段的三维无限元计算 |
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| 引用本文： | 王艳芬,谢洪阳,王元汉. 预应力锚索锚固段的三维无限元计算[J]. 华中科技大学学报(自然科学版), 2007, 35(9): 28-30 |
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| 作者姓名： | 王艳芬 谢洪阳 王元汉 |
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| 作者单位： | 华中科技大学,土木工程与力学学院,湖北,武汉,430074;华中科技大学,土木工程与力学学院,湖北,武汉,430074;华中科技大学,土木工程与力学学院,湖北,武汉,430074 |
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| 基金项目： | 中国科学院武汉岩石力学重点实验室开放基金 |
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| 摘 要： | 运用一维点无限元理论推导了三维四结点点辐射无限元的坐标变换和形函数,并将其与八结点有限元耦合,计算了预应力锚索锚固段的变形.结果表明:在预应力作用下,锚固段周边岩体的应力和压缩变形集中在以预应力作用点为中心的一个区域内,并呈指数形式衰减,因而在空间形成了应力锥和位移锥.将无限元计算结果与理论结果进行了对比,两种计算方法的结果拟合得非常好,表明本文的方法是可信的.
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| 关 键 词： | 无限元 预应力锚索 耦合 有限元 |
| 文章编号： | 1671-4512（2007）09-0028-03 |
| 修稿时间： | 2006-09-01 |
Calculation of pre-stressed anchorage segments by 3D infinite element |
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| Wang Yanfen,Xie Hongyang,Wang Yuanhan. Calculation of pre-stressed anchorage segments by 3D infinite element[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 2007, 35(9): 28-30 |
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| Authors: | Wang Yanfen Xie Hongyang Wang Yuanhan |
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| Affiliation: | College of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | Based on the one dimension infinite element theory,the coordinate translation and shape function of 3D point-radiate 4-node infinite elements are derived.They are coupled with 8-node finite elements to compute the compression distortion of the pre-stressed anchorage segment.The results indicate that when the pre-stressed force act on the anchorage segment,the stresses and the displacements in the rock around the anchorage segment concentrate on the zone center with the anchor axis and they decrease with exponential forms.Therefore,the stresses and the displacement spindles are formed.The calculating results of the infinite element are close to the theoretical results.That indicates the method of this paper is right. |
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| Keywords: | infinite element pre-stressed anchor couple finite element |
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