摘要
传统的烈度衰减关系一般是由历史地震等震线资料拟合得到,但基于历史震例进行统计回归所得到的椭圆衰减模型往往不能够反映大地震时的地震衰减特点。尝试提出一种基于点源模型改进的线源地震影响场计算模型,引入地表破裂尺度对原有烈度衰减模型进行长轴上的修正,以期达到生成结果与强震实际烈度相拟合的目的,并可实现极震区震害的快速评估和计算。
Traditional intensity attenuation relation is generally achieved by fitting seismic data of historical earthquakes. However, elliptical attenuation model from statistical regression based on seismic cases in history cannot usually reflect attenuation characteristics in megaseism, an improved calculation model of line-source seismic effect field based on point source model is presented in this essay, introducing the major axis correction of original intensity attenuation model by surface rupture size to match generated result to actual intensity of mieroseism, and to assess and calculate seismic damages in meizoseismal area promptly.
出处
《地震地磁观测与研究》
2012年第3期14-19,共6页
Seismological and Geomagnetic Observation and Research
基金
地震应急青年课题(CEA_EDEM-201009)
关键词
地震烈度
衰减模型
影响场
线源模型
极震区
earthquake intensity, attenuation model, effect field, line-source model, meizoseismal area
