地下圆形衬砌洞室对SH波的动应力集中(Ⅱ):数值结果  

Dynamic stress concentration of an underground cylindrical lined cavity subjected to incident plane SH waves(Ⅱ) : numerical results

作　　者：纪晓东[1] 杜修力[2] 

机构地区：[1]大连大学建筑工程学院,辽宁大连116622 [2]北京工业大学建筑工程学院,北京100124

出　　处：《世界地震工程》2013年第4期46-51,共6页World Earthquake Engineering

基　　金：国家973计划项目(2007CB714203);国家自然科学基金重点项目(90715035);辽宁省教育厅高等学校科研项目计划(No:2008058)

摘　　要：利用地下圆形衬砌洞室在入射平面SH波作用下动应力集中问题的级数解,定量分析了入射波长、入射角度、洞室直径及衬砌刚度等因素对动应力集中系数的影响。数值结果表明:(1)衬砌刚度对动应力集中系数有重要影响,刚性衬砌情形的动应力集中系数最大,无衬砌情形次之,柔性衬砌情形最小;环向与轴向动应力集中系数最大可分别达到83.49与85.31;(2)入射频率和入射角度对动应力集中系数也有很大的影响。The series solution of an underground cylindrical lined cavity subjected to incident plane SH waves was used to quantitatively analyze the effect of incident wavelength,incident angle,diameter of the cavity,and liner stiffness on dynamic stress concentration factor.The numerical results show that：（1） the rigidity of liner has great effect on dynamic stress concentration factor,the factor is highest for a cavity with rigid lining,and it takes second place for an unlined cavity,and it is lowest for a cavity with flexible lining; the dynamic hoop and axial stress concentration factor can be 83.49 and 85.31 ; （2） the frequency and the angles of the incident waves also plays an important role in the dynamic stress concentration factor.

关 键 词：衬砌洞室 SH波 动应力集中 数值结果 

分 类 号：O347.4[理学—固体力学] P315.3[理学—力学]