摘要
断层作为地震动能量释放的主要途径,其运动方式直接影响盆地内地震动的空间分布和放大程度,研究地震断层类型对盆地放大效应及盆地内防震减灾有重要意义。基于日本浓尾盆地的强震记录分析逆断层型地震和走滑型地震的放大倍数与盆地深度的关系。研究表明:①周期0.1~5 s时,与预测值相比,走滑型地震的地面运动基本不放大,而逆断层型地震的地面运动在盆地深处放大效应明显,且随着周期的增长放大倍数趋于稳定;②走滑型地震在各个周期的放大倍数与盆地深度的相关性均较弱,逆断层型地震的放大倍数则随着盆地深度的增加而增加,呈现出较好的相关性。
Faults,as the main pathway of ground vibration energy release,and their mode of motion directly affect the spatial distribution and amplification of vibration in the basin,and the study of the type of seismic faults is of great significance to the amplification effect in the basin and to the earthquake prevention and mitigation in the basin.This paper analyzes the relationship between the amplification of reverse fault-type earthquakes and strike-slip earthquakes and the depth of the basin based on the strong earthquake records in the Nobi Basin,Japan.The study shows that:①the ground motion of strike-slip earthquakes is basically unamplified compared with the predicted value at periods of 0.1-5 s,while the ground motion of reverse fault earthquakes has a significant amplification effect in the deeper part of the basin,and the amplification stabilizes with the growth of the period;②the correlation between the amplification of strike-slip earthquakes and the depth of the basin at each period is weak,while the amplification of reverse fault earthquakes increases with the increase of the basin depth,showing a better correlation with the depth of the basin.The amplification of reverse fault earthquakes increases with the depth of the basin,showing a better correlation.
作者
刘晓光
LIU Xiaoguang(Huaiyin Normal University,Huai'an 223300,China)
出处
《四川建材》
2025年第8期95-98,共4页
Sichuan Building Materials
关键词
浓尾盆地
逆断层
走滑断层
地震动反应谱
放大倍数
盆地深度
面波干涉
Nobi Basin
reverse fault
strike-slip fault
seismic response spectrum
amplification factor
basin depth
surface wave interference
