| 同一测点不同地震动分量空间相干性分析 |
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| 引用本文： | 钟菊芳,胡晓,屈铁军,吴胜兴.同一测点不同地震动分量空间相干性分析[J].地震研究,2005,28(4):378-382. |
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| 作者姓名： | 钟菊芳 胡晓 屈铁军 吴胜兴 |
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| 作者单位： | 河海大学土木工程学院,南京,210098;中国水利水电科学研究院抗震中心,北京,100044;北方工业大学建筑学院,北京,100041 |
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| 基金项目： | 科技部科研项目;北京市自然科学基金;北京市教委科技发展计划项目 |
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| 摘 要： | 利用SMART-1台阵的3次地震记录计算了同一测点三平动地震动分量问的相干值，并提出了相干函数模型。分析表明，同一测点各地震动分量间是低相干的，随频率衰减不明显；两水平分量问的相干性比水平分量与垂直分量间的相干性大。因此在工程计算中不计相干函数随频率的变化不会带来太大的误差。
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| 关 键 词： | 同一测点 地震动分量 相干性 相干函数模型 |
| 文章编号： | 1000-0666-(2005)04-0378-05 |
| 收稿时间： | 2004-08-13 |
| 修稿时间： | 2004年8月13日 |
Spatial Coherency Analysis of Different Ground Motion Components at the Same Observational Station |
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| ZHONG Ju-fang,HU Xiao,QU Tie-jun,WU Sheng-xing.Spatial Coherency Analysis of Different Ground Motion Components at the Same Observational Station[J].Journal of Seismological Research,2005,28(4):378-382. |
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| Authors: | ZHONG Ju-fang HU Xiao QU Tie-jun WU Sheng-xing |
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| Institution: | 1. School of Civil Engineering, Hohai University, Nanjing 210098, China;2. Engineering Earthquake-Resistance Research Center, China Institute of Water Resources and Hydropower Research, Beijing 100044, China;3. School of Architecture, North China University of Technology, Beifing 100041, China |
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| Abstract: | On the basis of the acceleration data of three large earthquakes recorded by SMART-1 Array in Taiwan,China,we calculated the coherency values between three ground motion translation components observed at the same station,and put forward the coherency function model.The results show that the coherency values are low between every two components,and they don't vary obviously with decaying frequency.The coherency between two horizontal components is higher than those between horizontal components and vertical component.So,in engineering computation it is acceptable to neglect the directional variation of coherence value with frequency. |
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| Keywords: | same observation station ground motion component coherency coherency function model |
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