摘要
本文计算了SMART-1台阵三次地震各测点加速度水平分量的功率谱,用Kanai-Tajimi功率谱模型拟合,求得了模型的三个谱参数。然后用线性回归模型统计了各参数在场地上的变化规律。分析结果表明,和在场地上的变化不明显,而谱强度S_0则随测点坐标和测点所在位置土层厚度的变化较明显。土层越厚,S_0越大;测点的坐标值越大(离震中越远),则S_0越小。分析结果可供长结构地震反应分析时参考应用。
ID this paper, the power spectra of horizontal accelerations of stations recorded during 3 earthquakes at SMART-1 array are calculated and 3 parameters are determined through
fitting For Kanai-Tajimi model. The variable characteristics of parameters in local site are
analyzed using the linear regression model. The results show that the variation of and is not remark able, but S0 increases clearly with the increase of thickness of the soil layer, and decreases clearly with the increase of coordinates of stations. These results may be used to analyze long structures as reference and application.
出处
《世界地震工程》
CSCD
1995年第1期34-43,共10页
World Earthquake Engineering
基金
地震科学联合基金(92101)
关键词
功率谱
统计分析
局部场地
空间变化
地震
Power Spectra Statistical analysis Local site Spatial variation
