| 基于脆剪分析的岩体非线性强度特性在统一强度理论中的实现 |
| |
| 引用本文： | 李远,李振,乔兰,李淼.基于脆剪分析的岩体非线性强度特性在统一强度理论中的实现[J].岩土力学,2014,35(Z1):173-180. |
| |
| 作者姓名： | 李远 李振 乔兰 李淼 |
| |
| 作者单位： | 北京科技大学 金属矿山高效开采与安全教育部重点实验室，北京 100083 |
| |
| 基金项目： | 国家“863”计划课题资助项目(No.2013AA06A411)；中央高校基本科研业务费专项资金资助(No. FRF-TP-12-008A)。 |
| |
| 摘 要： | 针对统一强度理论（UST）拟合非线性强度的局限和岩土材料强度特点，提出拟合岩土非线性强度特征的脆性剪切分析方法，建立了过渡式双线性强度分解公式。以脆断、剪切双重破坏机制，解释Hoek-Brown准则的非线性特征机制，并推导出体现岩石、岩体类材料非线性强度特征的脆剪强度公式。Mine-by隧道和北山花岗岩强度数据分析显示，在岩体折减强度、试验数据直接拟合实例分析中，脆剪强度与Hoek-Brown强度相关性系数均在0.98以上，在该基础上建立岩体非线性强度脆剪分析的双线性过渡式，并提出对应的统一强度理论形式，实现统一强度理论在拟合岩土非线性强度准则中的扩展。
|
| 关 键 词： | 脆性剪切 本构关系 统一强度理论 Hoek-Brown 强度准则 |
| 收稿时间： | 2013-03-15 |
Realization of rock mass nonlinear strength characteristics in unified strength theory based on brittle-shear strength analysis |
| |
| LI Yuan
,
LI Zhen
,
QIAO Lan
,
LI Miao.Realization of rock mass nonlinear strength characteristics in unified strength theory based on brittle-shear strength analysis[J].Rock and Soil Mechanics,2014,35(Z1):173-180. |
| |
| Authors: | LI Yuan LI Zhen QIAO Lan LI Miao |
| |
| Institution: | State Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China |
| |
| Abstract: | Considering the limitation of the unified strength theory (UST) in nonlinear fitting and nonlinear features of geotechnical materials, a brittle-shear strength analysis method is proposed; and a transition bilinear formula is derived. Nonlinear strength feature of Hoek-Brown criterion is explained based on the double failure mechanism of fracture and shear; and an associated formula with highly correlation is obtained. Mine-by tunnel and the strength of Beishan granite data results analysis show that coefficients of correlation of Hoek-Brown rock mass strength, experimental data and brittle-shear strength values are all above 0.98. Twin formulas of Hoek-Brown criterion in the form of UST are derived based on the brittle-shear nonlinear fitting. Application of UST to fitting nonlinear strength of geotechnical materials is realized. |
| |
| Keywords: | brittle-shear constitutive relation unified strength theory Hoek-Brown failure criterion |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
