| 具有弯曲效应的层状结构岩体变形的Cosserat介质分析方法 |
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| 引用本文： | 佘成学,熊文林.具有弯曲效应的层状结构岩体变形的Cosserat介质分析方法[J].岩土力学,1994,15(4):12-19. |
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| 作者姓名： | 佘成学 熊文林 |
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| 作者单位： | 武汉水利电力大学 |
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| 摘 要： | 在反倾向层状岩体边坡、有底鼓现象的巷道以及隧洞工程中，岩体常出现弯曲变形及弯曲破坏现象。常规的等效连续介质理论忽略了梯度应力的影响，因而不能很好解决上述工程问题．Ｃｏｓｓｅｒａｔ介质理论以具有一定尺度的微元体为研究对象，引进了偶应力及弯曲曲率概念，从而考虑了弯曲效应对介质变形特性的影响。本文首先介绍Ｃｏｓｓｅｒａｔ介质理论的基本原理，然后建立有限元计算模式，最后通过算例，说明这种模式对计算具有弯曲效应的展状岩体变形问题是有效的。
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| 关 键 词： | Cosserat介质 偶应力 曲率 有限元 |
Cosserat Medium Analysis of Deformation of Layered Rockmass with Bending Effects |
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| She Chenaue,Xiong Wenlin, Chen Shenhong.Cosserat Medium Analysis of Deformation of Layered Rockmass with Bending Effects[J].Rock and Soil Mechanics,1994,15(4):12-19. |
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| Authors: | She Chenaue Xiong Wenlin Chen Shenhong |
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| Abstract: | The Layered rockmass in slopes or tunnels is often subjected to bending deformation or bending damage. This kind of engineering problem can not be well solved by the conventional equivalent continuum theory due to its ignoring of the influence of gradient stress on rockmass. Because of using the element with defined dimensions as researching basis, and introducing the concepts of couple stress and bending curvature, the problems can be solved by the Cosserat Medium Theory. First, the basic principle of the theory is introduced in this paper, then the FEM model is constructed, and finally, the theory is demonstrated to be effective for solving the above stated problems with a few calculative examples. |
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| Keywords: | Cosserat medium couple stress curvature FEM |
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