摘要
根据银川盆地不同厚度覆盖层上的三分向( 东西、南北和垂直) 地脉动测量数据,绘制出水平向振幅谱与垂直向振幅谱的比值曲线.结果表明,谱比曲线上最大峰值处的频率大小显著地反映了覆盖层的薄厚.通过银川市部分房屋自振频率的对比分析认为,该部分房屋在未来地震中将遭受严重破坏.
Based on tri component measurement of microtremor on different thickness sediment layers in Yinchuan basin,the curves of ratio of horizontal spectrum to vertical spectrum were drawn.These curves show that the frequency value corresponding to maximum peak obviously reflect the sediment layers' thickness. Comparing the frequency value with predominant frequency of some buildings in Yinchuan,it can be concluded that these buildings would be seriously damaged by future earthquakes.
出处
《西北地震学报》
CSCD
1999年第4期383-388,共6页
Northwestern Seismological Journal
关键词
地脉动
振幅谱比
自振频率
地震波
放大特性
Microtremor
Amplitude spectrum ratio
Predominant frequency
Seismic amplification
