[1]马俊玲,罗翼,丁海平.不同地震波波型对相干系数影响的对比分析[J].自然灾害学报,2018,(05):020-26.[doi:10.13577/j.jnd.2018.0503]
 MA Junling,LUO Yi,DING Haiping.Comparison of influence of different seismic wave types on coherence coefficient[J].,2018,(05):020-26.[doi:10.13577/j.jnd.2018.0503]
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不同地震波波型对相干系数影响的对比分析
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年05期
页码:
020-26
栏目:
出版日期:
2018-10-28

文章信息/Info

Title:
Comparison of influence of different seismic wave types on coherence coefficient
作者:
马俊玲1 罗翼1 丁海平12
1. 苏州科技大学 江苏省结构工程重点实验室, 江苏 苏州 215011;
2. 中国地震局 工程力学研究所, 黑龙江 哈尔滨 150080
Author(s):
MA Junling1 LUO Yi1 DING Haiping12
1. Suzhou University of Science and Technology, Key Laboratory of Structure Engineering of Jiangsu Province, Suzhou 215011, China;
2. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
关键词:
SMART-1 台阵空间相关性相干函数S波时间窗长大结构
Keywords:
SMART-1 arraythe spatial variation of seismic ground motioncoherency modelsS-wavelarge-scale structure
分类号:
P315.9;X43
DOI:
10.13577/j.jnd.2018.0503
摘要:
地震动空间变化一般采用相干函数描述,在利用强震记录计算相干系数时,加速度时程时间窗的选取常常不一样,有的采用S波时间窗,有的直接采用整条强震记录,等等。利用台湾SMART-1台阵的第5次和第45次地震的加速度记录,分别计算了S波时间窗和整条时程的相干系数,并进行了曲线拟合。通过对拟合结果的比较发现:整条记录的相干系数比S波时间窗的相干系数偏小,降低了地震动的空间相关性;同时,台站间距d影响也很大,d越大,采用整条记录统计得到的相干系数降低越多。因此,进行地震动空间相干系数的统计时,必须考虑不同的地震波波型的影响因素。
Abstract:
The spatial variation of seismic ground motion is often described by coherency models. When the coherency is calculated by strong motion records, the selection of acceleration time window is often different, sometimes the S-wave window is used, or the whole strong motion record, etc. For the acceleration records of the 5th and 45th earthquakes in Taiwan’s SMART-1 array, the coherency of the S-wave and the entire time-history are respectively calculated and curve fitting was performed. Through comparison of fitting results show that the coherency calculated by two different wave types are very different:the coherency calculated by the entire records are smaller than which calculated by S-wave window; the influence of distance d between stations is also great, the bigger the d is, the more the coherency calculated by whole records decrease. Therefore, when calculate the coherence coefficient of seismic ground motion, the effects of different waveforms must be considered.

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备注/Memo

备注/Memo:
收稿日期:2018-05-30;改回日期:2018-06-25。
基金项目:国家自然科学基金项目(51678383)
作者简介:马俊玲(1987-),女,硕士,主要从事地震工程研究.E-mail:majunling321@126.com
通讯作者:丁海平(1966-),男,教授,主要从事地震工程和防灾减灾工程.研究E-mail:hpding@126.com
更新日期/Last Update: 1900-01-01