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| 深埋隧道围岩系统卸荷演化过程的Lyapunov指数分析 | |
| 引用本文： | 赵瑜,李晓红,卢义玉,康勇,陈陆望.深埋隧道围岩系统卸荷演化过程的Lyapunov指数分析[J].岩土力学,2008,29(10):2871-2876. |
| 作者姓名： | 赵瑜 李晓红 卢义玉 康勇 陈陆望 |
| 作者单位： | 1. 重庆大学土木工程学院,重庆,400030西南资源开发及环境灾害控制工程教育部重点实验室,重庆,400030 2. 西南资源开发及环境灾害控制工程教育部重点实验室,重庆,400030 3. 合肥工业大学资源与环境学院,合肥,230009 |
| 摘 要： | 岩石材料本质上是一种物理非线性的材料,在深埋条件下,隧道围岩系统的变形还表现出几何非线性,这两种非线性机制的相互作用使得围岩系统的卸荷演化具有高度的复杂性.根据重庆某深埋隧道围岩实际情况,运用FLAC3D三维显式有限差分法分析软件,建立了摩尔-库仑剪破坏与拉破坏复合的应变软化模型,采用大变彤方法对深埋隧道围岩系统卸荷进行数值仿真,引入混沌动力学理论对数值模拟的分析结果进行整合,提取了围岩系统演化过程中特征点演化时间序列的Lyapunov指数,对其混沌形态进行了研究.实例分析表明:深埋隧道围岩系统卸荷演化呈现典型的混沌性态,且系统演化具有对初始条件的敏感性. |
| 关 键 词： | 深埋隧道 卸荷 Lyapunov指数 系统演化 |
| 收稿时间： | 2008-06-06 |
Lyapunov exponent of surrounding rock system in process of unloading for deep-buried tunnel |
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| ZHAO Yu,LI Xiao-hong,LU Yi-yu,KANG Yong,CHEN Lu-wang.Lyapunov exponent of surrounding rock system in process of unloading for deep-buried tunnel[J].Rock and Soil Mechanics,2008,29(10):2871-2876. | |
| Authors: | ZHAO Yu LI Xiao-hong LU Yi-yu KANG Yong CHEN Lu-wang |
| Institution: | 1.College of Civil Engineering, Chongqing University, Chongqing 400030, China; 2.Key Lab. for the Exploitation of Southwest Resources & the Environmental Disaster Control Engineering, Ministry of Education, Chongqing 400030, China; 3.School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China |
| Abstract: | Rock is a kind of physical nonlinear complicated medium,under deep-buried condition the deformation of surrounding rock system shows geometrical nonlinear;and the interaction between two nonlinear mechanisms makes the unloading of surrounding rock system evolved complexly.Based on Fast Lagrangian Analysis of Continua 3 Dimensions,shear-tension failure model of Mohr-Coulomb is established.Numerical simulation of deep-buried tunnel surrounding rock system is introduced by using large deformation method;and ch... |
| Keywords: | deep-buried tunnel unload Lyapunov exponent system evolution |
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