摘要
在压力隧洞充水运行时，对衬砌与围岩之间的接缝采用接缝空腔单元模拟。运用荷载分级、变刚度迭代的三维弹塑性有限元法合理地模拟衬砌与围岩的接触过程。根据接触过程中衬砌塑性区、应力场和位移场的变化规律，在其可能开裂部位通过设置预裂单元模拟衬砌开裂后其切向应力的释放、转移过程。最后通过一工程实例计算得出一些有实际工程参考价值的结论。
The process of contact development of lining and rock mass is correctly simulated, after pressure tunnel is filled with water. The slot elements are set up to simulate slot between lining and rock mass and the 3 D elastoplastic FEM is adopted with multi stage load and changible stiffness iteration. According to the variation laws of plastic zone, stress and displacement fields of concrete lining in the contact process, the transfering process of tangential stress of lining and rock mass can be well simulated by setting up precrack element at possible crack position. Finally, some useful conclusions are presented by calculating an actual tunnel project through above method .
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
1997年第5期453-460,共8页
Chinese Journal of Rock Mechanics and Engineering
关键词
压力隧洞
水工隧洞
充水运行
接缝
衬切
模拟
pressure tunnel, slot element, contact process, contact angle, precrack element
