摘要
首先建立了青藏高原东北地区的地震烈度衰减关系 ,然后以美国西部地区作为参考地区 ,在霍俊荣数据的基础上 ,增加了近年来得到的部分强震记录 ,采用反映高频地震动震级饱和与近场饱和特征的衰减关系模型 ,统计得到了美国西部地区水平向基岩加速度峰值与短周期反应谱衰减关系 .与用美国南加州数字宽频带记录建立的美国西部长周期加速度反应谱衰减关系结合 ,得到了美国西部周期 0 .0 4～ 6s的反应谱衰减关系 .采用转换方法 ,得到了青藏高原东北地区水平向基岩加速度峰值与反应谱衰减关系 .
The seismic intensity attenuation relations in northeastern Tibetan Plateau region are established by a regression analysis on isoseismal data. Then the attenuation relations for horizontal peak ground acceleration and short-period response spectrum for western North America are derived based on the database of Huo Jun-rong and strong motion data from recent earthquakes. The attenuation relations of long-period response spectrum for western North America are developed by analyzing the broadband digital seismic recordings of Southern California. By integrating the short-period and long-period attenuation relationships, the attenuation relations for horizontal acceleration response spectrum in the period range of 0.04～6 s for western North America are established. The attenuation equation that accounts for the magnitude saturation and near-field saturation of high frequency ground motion is used. Finally the attenuation relations for horizontal peak ground acceleration and response spectrum for the region of northeastern Tibetan Plateau are developed by using the transforming method.
出处
《地震学报》
CSCD
北大核心
2004年第6期591-600,共10页
Acta Seismologica Sinica
基金
国家 973项目 (2 0 0 2CB4 12 70 6 )
国家自然科学基金项目 (40 374 0 17)
中国地震局"十五"重点科研项目"地震安全性评价与结构抗震研究"共同资助
关键词
衰减关系
反应谱
青藏高原东北地区
attenuation relation
response spectrum
northeastern Tibetan Plateau
