带裂纹隧道二次衬砌承载能力的平面有限元计算分析  

2D finite element analysis of bearing capacity of tunnel lining with cracks

作　　者：张玉军[1] 李治国[2] 

机构地区：[1]中国科学院武汉岩土力学研究所,武汉430071 [2]中铁隧道集团有限公司科研所,河南洛阳471009

出　　处：《岩土力学》2005年第8期1201-1206,共6页Rock and Soil Mechanics

摘　　要：以平面有限元位移法分析了带裂纹隧道二次衬砌裂纹尖端的应力强度因子及衬砌承载安全系数,其中主要考虑了裂纹深度、宽度及条数的影响。从计算结果得知,随着裂纹深度、条数的增加,应力强度因子增大,衬砌承载安全系数减小,而裂纹宽度的影响不太明显。The authors analyze the stress intensity factors at the tips of cracks in a tunnel lining and the safety factors for bearing capacity of the tunnel lining by using a 2D FEM code, in which the influences of lengths, widths and number of cracks are mainly considered. The computation results show that the stress intensity factors raise and the safety factors of bearing capacity decrease with the increase of lengths and number of cracks, but the effect of crack widths is not so obvious.

关 键 词：隧道衬砌 裂纹 应力强度因子 平面有限元分析 

分 类 号：U45[建筑科学—桥梁与隧道工程]