摘要
借助W olf的土层和半空间精确动力刚度矩阵及斜线荷载的格林函数,利用间接边界元法在频域内求解了局部断层场地对SV波的散射,着重分析了破碎带较窄断层两侧围岩动力响应的基本规律,以及场地动力特性对散射的影响。研究表明,破碎带断层对SV波有显著的影响,即使破碎带很窄,也可以对SV波产生很大的放大作用;层状场地的动力特性对放大作用有显著的影响。
SV wave scattering by fracture fault are presented in frequency domain using indirect boundary element method （IBEM）, in which the ：dynamic stiffness： matrix and of soil layer Green function for distributed loads acting on inclined line by Wolf are used. It＇ is showed that fault fracture zone has great effect on SV wave scattering. Even if fracture zone is very narrow, large amplification may appear. Dynamic properties of soil layer ground also play an importantrole in the amplification.
出处
《自然灾害学报》
CSCD
北大核心
2009年第5期94-106,共13页
Journal of Natural Disasters
基金
教育部博士点基金项目(200800560046)
关键词
局部断层场地
破碎带
SV波
散射
间接边界元
动力刚度矩阵
格林函数
local fault site
fracture zone
SV wave
scattering
indirect boundary element
dynamic stiffness matrix
Green＇ s function
