北京交通大学学报2012，Vol.36Issue(6)：79-84,6.
SV波斜入射下局部地形对隧道地震响应的影响
Influence of local topographic on seismic response of tunnels subjected to obliquely incident SV waves
摘要
Abstract
The spatial variation of local ground motion caused by irregular topography and obliquely incident seismic waves will have influence on the global dynamic response analysis of tunnels. Based on wave theory, a whole numerical dynamic analysis model of tunnels was established, which simultaneously considered the effect of local irregular sites and the inconsistency of seismic waves caused by special obliquely incident direction. The model was used to evaluate the seismic response of tunnels subjected to obliquely incident SV seismic waves under slope and neighboring topography. Among the main conclusions of the study are that wave-type conversion caused by obliquely incident SV seismic waves and local topographic effects can make a change on the stress state of tunnel periphery, as well as the location of maximum dynamic response of tunnels. As a result, the potential instability of tunnels will increase. Moreover, the incident direction of SV waves has significant effect on the changing trend of dynamic-displacement responses of key points in tunnel. In view of this, the incident angle and the incident direction of SV waves as well as the topographic condition should be taken into account simultaneously in the seismic safety risk assessment of tunnels, especially in areas susceptible to seismic phenomena.关键词
隧道/局部地形/地震响应/斜入射/黏弹性人工边界Key words
tunnels/ local topographic/ seismic response/ obliquely incident/ viscoelastic artificial boundary分类
交通工程引用本文复制引用
傅方,赵成刚,李伟华,张卫华..SV波斜入射下局部地形对隧道地震响应的影响[J].北京交通大学学报,2012,36(6):79-84,6.基金项目
国家自然科学基金重大研究计划资助项目(90715035) （90715035）
北京市教委重点项目资助(KZ200910016008) （KZ200910016008）
中央高校基本科研业务费专项资金资助(2009JBM064) （2009JBM064）
