[1]江 鹏,郭 迅,何 福,等.同一场地多次强震记录一致性分析[J].华南地震,2022,(03):29-35.[doi:10.13512/j.hndz.2022.03.04]
 JIANG Peng,GUO Xun,HE Fu,et al.Consistency Analysis of Multiple Strong Earthquake Records in the Same Site[J].,2022,(03):29-35.[doi:10.13512/j.hndz.2022.03.04]
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同一场地多次强震记录一致性分析()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年03期
页码:
29-35
栏目:
地震科学研究
出版日期:
2022-09-15

文章信息/Info

Title:
Consistency Analysis of Multiple Strong Earthquake Records in the Same Site
文章编号:
1001-8662(2022)03-0029-07
作者:
江 鹏1郭 迅2何 福2陈 波2
1.四川省地震局,成都 610041;2.防灾科技学院中国地震局建筑物破坏机理与防御重点实验室,河北 三河 065201
Author(s):
JIANG Peng1GUO Xun2HE Fu2CHEN Bo2
1.Sichuan Earthquake Agency, Chengdu 610041, China;2.Key Laboratory of Building Collapse Mechanism and Defense, China Earthquake Administration , Institute of Disaster Prevention , Sanhe 065201, China
关键词:
长宁地震场地卓越周期地震记录一致性
Keywords:
Changning earthquakeSitePredominant periodSeismic recordsConsistency
分类号:
P315.3
DOI:
10.13512/j.hndz.2022.03.04
文献标志码:
A
摘要:
建设场地的地震动一般用峰值、频谱、持时来描述,用既有方法确定的地震动可靠性难以检验。利用长宁地震中一个已知场地遭遇9次地震的记录作验证尝试,通过傅里叶谱、反应谱和谱比分析方法探讨记录所反映出的卓越周期的一致性。分析结果表明:东西向反应谱卓越周期平均值为0.21s,南北向卓越周期平均值为0.18s,竖向卓越周期平均值为0.11s,这三个卓越周期值离散性都很小。场地勘察显示覆盖层厚度19.5m,等效剪切波速197m/s,场地特征周期为0.40s。实际记录反映的卓越周期与勘察方法计算值相差一倍。用地震记录做谱比时,N/V(南北向)卓越周期为0.30~0.37s,平均值为0.33s。E/V(东西向)卓越周期为0.18~0.48s,平均值为0.26s。分析认为,场地卓越周期与个性化的地震输入密切相关。
Abstract:
The ground motion of construction site is generally described by peak value, spectrum and duration. The reliability of ground motion determined by existing methods is difficult to test. In this paper,the records of 9 earthquakes in a known site during the Changning earthquake are used to verify the results. The consistency of the predominant period reflected by the records is discussed by means of Fourier spectrum, response spectrum and spectral ratio. The results show that the average value of the predominant period of east-west response spectrum is 0.21 s,the average value of the predominant period of north-south predominant period is 0.18 s,and the average value of vertical predominant period is 0.11 s. The dispersion of these three predominant period values is very small. The site survey shows that the thickness of overburden is 19.5 m,the equivalent shear wave velocity is 197 m/s,and the site characteristic period is 0.40 s. The predominant period reflected by actual record is less than half of the calculated value of survey method. When seismic records are used for spectral ratio,the predominant period of N/V spectral ratio ranges from 0.30 s to 0.37 s,with an average of 0.33 s. The E/V predominant period ranges from 0.18 s to 0.48 s, with an average value of 0.26 s, which is also close to the survey results. Overall, the site predominant period is closely related to personalized seismic input.

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备注/Memo

备注/Memo:
收稿日期:2021-11-02
基金项目:国家重点研发计划项目(2018YFC1504302-3、 2016YEE0205100)
作者简介:江鹏(1987-),男,工程师,主要从事强震动观测工作。E-mail:jiangpeng@scdzj.gov.cn
通信作者:郭迅(1967-),男,博士,研究员,主要从事结构抗震和结构健康诊断研究。E-mail:guoxun@cidp.edu.cn
更新日期/Last Update: 2022-09-15