摘要
本文采用阶跃截面固体的一维弹性波传播模型,研究了地形对地震烈度衰减的影响。采用固体入射纵波来模拟无地形影响的地震烈度衰减;采用固体透射波来模拟有地形影响的地震烈度衰减。利用阶跃截面处的放松连续条件,得出了烈度与高度差的近似定量关系。同时,以新疆地区逆冲走滑型地震为例,讨论了烈度与高度差的近似定量关系描述地形对地震烈度衰减影响的有效性。
In this paper we introduce a model of one-dimensional wave propagation in a solid of a stepped cross section to investigate the influence of topography on seismic intensity attenuation.The seismic intensity attenuation without and with the influence of topography are represented by the incident wave and the transmitting wave,respectively.The consideration of continuity condition yields the quantitative relation of seismic intensity and elevation.Finally,we take earthquakes along strike and slip faults in Xinjiang as case study to validate the proposed model.
出处
《震灾防御技术》
2010年第3期281-287,共7页
Technology for Earthquake Disaster Prevention
基金
地震行业科研专项项目(200708047)
中国地震局地壳应力研究所基本科研业务专项资金资助项目(ZDJ2007-2
ZDJ2009-14)
关键词
地形
地震烈度衰减
阶跃截面
弹性波
Topography
Seismic intensity attenuation
Stepped cross section
Elastic wave
