A numerical large strain solution for circular tunnels excavated in strain-softening rock masses

被引：43
|
作者：
Zhang, Qiang [1 ]
Wang, Hong-Ying [2 ,3 ]
Jiang, Yu-Jing [2 ]
Lu, Meng-Meng [1 ]
Jiang, Bin-Song [1 ]
机构：
[1] China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China
[2] Nagasaki Univ, Grad Sch Engn, Geoenvironm Lab, Nagasaki 8528521, Japan
[3] Jiangsu Vocat Inst Architectural Technol, Coll Energy & Transportat Engn, Xuzhou 221116, Jiangsu, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2019年 / 114卷
关键词：
Circular tunnel; Large strain; Strain-softening; Yield criterion; Elastic-plastic analysis; GROUND RESPONSE CURVE; ELASTOPLASTIC ANALYSIS; DILATANCY; OPENINGS; MODEL;
D O I：
10.1016/j.compgeo.2019.103142
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
This paper presents a large strain numerical solution of a circular tunnel for the ground reaction curve (GRC) in strain-softening rock masses. Both the stress equilibrium equation and deformation compatibility equation are considered in a current coordinate. A series of examples are employed to validate the proposed solutions, and the results show that: (1) the displacement, softening and residual radii of larger strain solution are smaller than that of small strain solution, and their difference significantly increases with a decrease in the Young's modulus. (2) the increasing Poisson's ration and critical shear plastic strain decrease the displacement, softening and residual radii.
引用
收藏
页数：11
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