基于破裂度的堆积层滑坡危险性分析方法
文献类型：期刊论文
| 作者 | 李世海 ; 周东; 刘天苹
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| 刊名 | 岩石力学与工程学报
 |
| 出版日期 | 2013-07 |
| 卷号 | 32期号:增2页码:3909-3917 |
| 通讯作者邮箱 | shli@imech.ac.cn |
| 关键词 | 工程地质 滑坡 破裂度 地表裂缝 基于连续介质力学的离散元法 engineering geology landslide facture degree surface crack continuum-based discrete element method(CDEM) |
| ISSN号 | 1000-6915 |
| 其他题名 | Risk analysis method of accumulated landslide based on fracture degree |
| 产权排序 | 中国科学院力学研究所, 北京 100190 |
| 通讯作者 | 李世海 |
| 中文摘要 | 分析地表裂缝和滑面状态在滑坡灾害形成过程中表现出来的基本特征，建立地表裂缝和地质体内部破坏状态之间的联系。简单介绍基于连续介质力学的离散元法，对具体的、典型的滑坡进行数值模拟，发现数值模拟结果中的地表裂缝和材料强度有某种相关性，并且存在一个地表最大破裂数。同时定义滑面贯穿时对应的破裂数为滑面最大破裂数。提出破裂度的概念，分地表破裂度和滑面破裂度，取值为滑坡相应位置当前破裂数与最大破裂数之比。研究发现，地表破裂度与滑面的贯通有明确的对应关系，可以直接描述地质体的危险程度，并基于此提出破裂度分析滑坡危险性的基本方法。地表破裂度与网格的划分数目、形状等参数的相关性不大。说明基于破裂度和CDEM 分析方法判别滑坡体的危险度是可行的。 |
| 英文摘要 | Basic characteristics for development of surface cracks and state of slip surface during landslide disaster is studied, and relationship between surface cracks and internal fracture state is established. Continuum-based discrete element method(CDEM) is briefly introduced. Through simulation of specific and typical landslides with CDEM, relativity of strength and surface cracks is discussed and maximum number of surface cracks is found. Maximum number of slip surface cracks is defined as the number of cracks on slip surface which is already running through. The concept of fracture degree of surface and fracture degree of slip surface are proposed, which are defined as the ratio of current number of cracks to maximum number of cracks on surface and slip surface respectively. Numerical experiments show that there is a specific corresponding relationship between fracture degree of surface and state of slip surface, which could directly describe the risk of a geological body. Result shows that fracture degree does not rely on mesh division when calculation accuracy is guaranteed, which indicates that it is feasible to use this new method based on fracture degree and CDEM to evaluate the risk of a landslide. |
| 学科主题 | 岩体力学和土力学 |
| 收录类别 | EI |
| 资助信息 | 国家重点基础研究发展计划(973)项目(2010CB731500) |
| 语种 | 中文 |
| 公开日期 | 2014-01-17 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/47727]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 推荐引用方式 GB/T 7714 | 李世海,周东,刘天苹. 基于破裂度的堆积层滑坡危险性分析方法[J]. 岩石力学与工程学报,2013,32(增2):3909-3917. |
| APA | 李世海,周东,&刘天苹.(2013).基于破裂度的堆积层滑坡危险性分析方法.岩石力学与工程学报,32(增2),3909-3917. |
| MLA | 李世海,et al."基于破裂度的堆积层滑坡危险性分析方法".岩石力学与工程学报 32.增2(2013):3909-3917. |
入库方式： OAI收割
来源：力学研究所
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