Upper bound limit analysis of collapse shape for circular tunnel subjected to pore pressure based on the Hoek-Brown failure criterion

被引:89
作者
Huang, F. [1 ]
Yang, X. L. [1 ]
机构
[1] Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China
关键词
Limit analysis; Pore pressure; Collapsing block; Nonlinear failure criterion; STABILITY ANALYSIS; FACE STABILITY; ROCK SLOPES;
D O I
10.1016/j.tust.2011.04.002
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Based on Hoek-Brown failure criterion and using the upper bound theorem of limit analysis, a numerical solution for the shape of collapsing block in circular tunnel subjected to pore pressure is derived. The effect of water pressure which is assumed to be a work rate of external force is included in the upper bound analysis. By employing variational calculation to minimize the objective function, the upper solution of collapsing block is obtained, In order to evaluate the validity of the method used in this paper, the result for pore pressure coefficient r(u) = 0, with no effect of pore pressure taken into account, is compared with previous work. The good agreement shows that the method of calculating the upper solution for the shape of collapsing block subjected to pore pressure is valid. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:614 / 618
页数:5
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