摘要
对2021年5月21日云南漾濞M5.6、M6.4及M5.2地震中获取的120条强震动观测记录进行处理及分析,给出获取记录的地震动参数,绘制峰值加速度等值线分布图,发现其长轴均成NW-SE方向展布。将3次地震实际PGA观测值与俞言祥[1]、汪素云[2]地震动衰减关系进行对比,发现实际观测值与俞言祥预测值更吻合。对比分析典型台站的加速度反应谱,发现震级愈大,长周期分量愈明显;震级愈小,幅值衰减愈快。
120 strong motion observation records obtained from the M5.6,M6.4 and M5.2 earthquakes in Yangbi County,Yunnan Province on May 21,2021 were processed and analyzed in this paper,and the ground motion parameters of records were obtained.Then the peak acceleration contour maps of the three earthquakes were drawn,and their long axes were all distributed in the NW-SE direction.By comparing the actual PGA observations of the three earthquakes with the attenuation relationship of Yu Yanxiang[1]and Wang Suyun[2],we found that the actual observations were more consistent with the predicted values of Yu Yanxiang.Finally,the acceleration response spectre of typical stations were compared and analyzed,and it is found that the larger the magnitude is,the more obvious the long-period component is;the smaller the magnitude is,the larger the amplitude attenuation is.
作者
潘章容
李同林
崔建文
田秀丰
石文兵
张卫东
袁洁
PAN Zhangrong;LI Tonglin;CUI Jianwen;TIAN Xiufeng;SHI Wenbing;ZHANG Weidong;YUAN Jie(Gansu Earthquake Agency, Lanzhou 730000, Gansu, China;Sichuan Earthquake Agency, Chengdu 610041, Sichuan, China;Yunnan Earthquake Agency, Kunming 650224, Yunnan, China)
出处
《地震工程学报》
CSCD
北大核心
2021年第4期791-798,共8页
China Earthquake Engineering Journal
基金
甘肃省地震局科技发展基金(2020Q14)。
关键词
漾濞M6.4地震
PGA
加速度反应谱
衰减关系
Yangbi M6.4 earthquake
PGA
acceleration response spectrum
attenuation relationship
