摘要
为了自动化识别多脉冲记录,提出了一种基于循环迭代法的近断层脉冲型地震动参数化方法,对脉冲数、相位角、脉冲周期、脉冲能量等脉冲特性进行了参数化分析,并根据脉冲相关能量(PI_(v))定义3类脉冲属性:明显脉冲、中等脉冲和非脉冲;对640条记录经过最大PGV法旋转后进行参数提取,得到了130组明显脉冲以及86组中等脉冲数据,给出了脉冲能量的分布规律。结果表明:循环迭代法可以有效提取近断层脉冲分量。大部分非脉冲记录的PI_(v)基本小于0.3,中等脉冲记录的PI_(v)为0.3~0.5,明显脉冲的PI_(v)大于0.5,PI_(v)与定义的3类脉冲属性具有明显相关性。
A near-fault pulse-like ground motion parameterization method based on the progressive iterative method is proposed to parameterize the pulse properties such as the number of pulse,phase angle,pulse period,and pulse energy.Based on pulse correlation energy(PI_(v)),three types of the pulses are defined:obvious pulse,medium pulse,and non-pulse.Parameter extraction was performed on 640 records after rotating them by the maximum PGV method,and 130 groups of obvious pulses as well as 86 groups of medium pulses were obtained,and the distribution law of the pulse energies was given.The results show that the progressive iterative method can effectively extract the near-fault pulse components.Most of the non-pulse records have PI_(v) values less than 0.3,the PI_(v) values of the medium pulse records ranges from 0.3 to 0.5,and the PI_(v) values of the obvious pulse is more than 0.5.Pulse correlation energy is significantly correlated with the defined three types of pulse properties.
作者
宋松科
闫桢绪
李聪
权新蕊
常志旺
杨兵
SONG Songke;YAN Zhenxu;LI Cong;QUAN Xinrui;CHANG Zhiwang;YANG Bing(Sichuan Communication Surveying and Design Institute,Chengdu 610017,Sichuan,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China;Jiangsu Nuclear Power Corporation,Lianyungang 222000,Jiangsu,China)
出处
《地震研究》
北大核心
2026年第1期132-138,共7页
Journal of Seismological Research
基金
四川省交通勘察设计研究院有限公司资助科技项目(232022003)
国家自然科学基金面上项目(52478562,52178509).
关键词
近断层
速度脉冲
最大PGV方向
循环迭代法
near-fault
velocity pulse
maximum PGV direction
the progressive iterative method
