自然灾害学报
自然災害學報
자연재해학보
JOURNAL OF NATURAL DISASTERS
2009年
5期
94-106
,共13页
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
跼部斷層場地%破碎帶%SV波%散射%間接邊界元%動力剛度矩陣%格林函數
국부단층장지%파쇄대%SV파%산사%간접변계원%동력강도구진%격림함수
local fault site%fracture zone%SV wave%scattering%indirect boundary element%dynamic stiffness matrix%Green's function
借助Wolf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.
藉助Wolf的土層和半空間精確動力剛度矩陣及斜線荷載的格林函數,利用間接邊界元法在頻域內求解瞭跼部斷層場地對SV波的散射,著重分析瞭破碎帶較窄斷層兩側圍巖動力響應的基本規律,以及場地動力特性對散射的影響.研究錶明,破碎帶斷層對SV波有顯著的影響,即使破碎帶很窄,也可以對SV波產生很大的放大作用;層狀場地的動力特性對放大作用有顯著的影響.
차조Wolf적토층화반공간정학동력강도구진급사선하재적격림함수,이용간접변계원법재빈역내구해료국부단층장지대SV파적산사,착중분석료파쇄대교착단층량측위암동력향응적기본규률,이급장지동력특성대산사적영향.연구표명,파쇄대단층대SV파유현저적영향,즉사파쇄대흔착,야가이대SV파산생흔대적방대작용;층상장지적동력특성대방대작용유현저적영향.
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 important role in the amplification.
