| 带裂纹隧道二次衬砌承载能力的平面有限元计算分析 |
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| 引用本文： | 张玉军,李治国.带裂纹隧道二次衬砌承载能力的平面有限元计算分析[J].岩土力学,2005,26(8):1201-1206. |
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| 作者姓名： | 张玉军 李治国 |
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| 作者单位： | 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 |
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| 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。
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| 关 键 词： | 隧道衬砌 裂纹 应力强度因子 平面有限元分析 |
| 文章编号： | 1000-7598-(2005)08-1201-06 |
| 收稿时间： | 2003-10-13 |
| 修稿时间： | 2003年10月13 |
2D finite element analysis of bearing capacity of tunnel lining with cracks |
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| ZHANG Yu-jun,LI Zhi-guo.2D finite element analysis of bearing capacity of tunnel lining with cracks[J].Rock and Soil Mechanics,2005,26(8):1201-1206. |
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| Authors: | ZHANG Yu-jun LI Zhi-guo |
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| Institution: | 1.Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2.Scientific Institute of China Railway Tunneling Group, Luoyang 471009, China |
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| Abstract: | 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. |
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| Keywords: | tunnel lining crack stress intensity factor 2D finite element analysis |
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