[1]SHAO Zupeng,LIU Qifang.Influence of the Focal Depth on Two-dimensional Basin Amplification[J].Journal of Seismological Research,2022,45(03):489-497.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0049
]
Copy
Influence of the Focal Depth on Two-dimensional Basin Amplification
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
45
Number of periods:
2022 03
Page number:
489-497
Column:
生命线工程系统抗震防灾专栏
Public date:
2022-06-20
- Title:
- Influence of the Focal Depth on Two-dimensional Basin Amplification
- Keywords:
- the spectral element method; focal depth; dip angle of the basin; impedance ratio; dimensionless frequency
- CLC:
- P315.91
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2022.0049
- Abstract:
- Based on the spectral element method,four basin models with different dip angles are used to study the amplification law of the two-dimensional basin when non-plane waves caused by the strike-slip earthquake at different focal depths travel in the basin.The relationship between the maximum amplification,its position at the edge of the basin and the dimensionless frequency,dip angle of the basin is analyzed.The results show that:① With the increase of focal depth,the peak velocity ratio increases gradually in the horizontal direction,and reaches the maximum when focal depth is 10 km,and then decreases.And the position of the maximum peak velocity ratio in horizontal and vertical directions gradually becomes close to the edge of the basin.② When the focal depth is relatively shallow,there is little difference between the maximum ratios of the peak velocity in horizontal direction among four basin models with different dip angles,and the difference is always less than 1.When the focal depth is deep and the frequency is high(η≥1),the maximum ratios of the peak velocity vary greatly,and the maximum difference reaches 3.
- References:
-
陈学良,高孟潭,李铁飞.2011.Rayleigh面波作用下盆地场地响应特性研究[J].土木建筑与环境工程,33(S2):29-33.
丁海平,吕思东,于彦彦.2018.内源输入时盆地特征参数对盆地地震效应的影响[J].苏州科技大学学报(工程技术版),31(3):1-6.
郭明珠,谢礼立,凌贤长.2004.弹性介质面波地脉动单点谱比法研究[J].岩土工程学报,26(4):4.
李雪强.2011.沉积盆地地震效应研究[D].哈尔滨:中国地震局工程力学研究所.
廖树超,于彦彦,丁海平.2018.基于Lamb问题的谱元法和有限元法模拟精度比较[J].世界地震工程,34(3):190-198.
刘启方,于彦彦,章旭斌.2013.施甸盆地三维地震动研究[J].地震工程与工程振动,33(4):54-60.
刘启方.2020.1556年华县大地震地震动场模拟[J].自然灾害学报,29(5):3-12.
刘中宪,刘明珍,韩建斌.2017.近断层沉积盆地强地震动谱元模拟[J].世界地震工程,33(4):76-86.
严珍珍,张怀,杨长春,等.2009.汶川大地震地震波传播的谱元法数值模拟研究[J].中国科学:地球科学,39(4):393-402.
于彦彦,丁海平,刘启方.2020.盆地内外介质阻抗比对盆地地表地震动及次生Rayleigh面波的影响[J].岩土工程学报,42(4):667-677.
禹乐,于彦彦,丁海平.2020.内源作用下盆地倾角对地表地震动放大特征的影响[J].地震工程与工程振动,40(5):99-108.
张建经,朱传彬,张明,等.2014.地震入射角对盆地地震反应影响的数值分析[J].岩石力学与工程学报,33(S1):2720-2726.
Ayoubi P,Mohammadi K,Asimaki D.2020.A systematic analysis of basin effects on surface ground motion[J].Soil Dynamics and Earthquake Engineering,141:106490.
Chen K C.2003.Strong ground motion and damage in the Taipei basin from the Moho reflected seismic waves during the March 31,2002,Hualien,Taiwan earthquake[J].Geophysical Research Letters,30(11),doi:10.1029/2003GL017193,2003.
Kawase H,Aki K.1989.A study on the response of a soft basin for incident S,P,and Rayleigh waves with special reference to the long duration observed in Mexico City[J].Bulletin of the Seismological Society of America,79(5):1361-1382.
Kawase H.1996.The cause of the damage belt in Kobe:“the basin-edge effect,”constructive interference of the direct S-wave with the basin-induced diffracted/Rayleigh waves[J].Seismological Research Letters,67(5):25-34.
Komatitsch D,Vilotte J P.1999.Reply to comment by E Faccioli and A Quarteroni on “The spectral element method:An efficient tool to simulate the seismic response of 2D and 3D geological structures” by D Komatitsch and J-P Vilotte[J].Bulletin of the Seismological Society of America,89(1):332-334.
Komatitsch D.2012.Simulations of ground motion in the Los Angeles Basin based upon the spectral-element method[J].Bulletin of the Seismological Society of America,94(1):187-206.
PitarkaA,Irikura K.1996.Basin structure effects on long-period strong motions in the San Fernando Valley and the Los Angeles Basin from the 1994 Northridge earthquake and an aftershock[J].Bulletin of the Seismological Society of America,86(1B):672107.
[SD1,1]
- Similar References:
Memo
-
Last Update:
2022-07-01