| 用集集主震记录研究近断层强震记录的基线校正方法 |
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| 引用本文： | 陈勇,陈鲲,俞言祥.用集集主震记录研究近断层强震记录的基线校正方法[J].地震工程与工程振动,2007,27(4):1-7. |
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| 作者姓名： | 陈勇 陈鲲 俞言祥 |
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| 作者单位： | 中国地震局,地球物理研究所,北京,100081 |
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| 基金项目： | 国家自然科学基金项目(40374017) |
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| 摘 要： | 从集集主震记录中选取有代表性的246个台站的记录作为数据集。在总结国内外基线校正方法的基础上,提出以下校正步骤:(1)初步判定记录中是否包含永久位移信息以便选用不同的校正方法。(2)以积分位移时程的末端平稳为标准,来确定积分速度时程末端拟合出的最优直线斜率作为校正量,去校正原始加速度时程,从而保留永久位移信息。永久位移等值线结果与GPS测量结果大体相符。根据校正结果推测认为:瞬变后保持或扩张或部分回弹,可能是决定永久位移形态的主要物理机制。
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| 关 键 词： | 集集主震 基线校正方法 永久位移 直线拟合 末端平稳 |
| 文章编号： | 1000-1301（2007）04-0001-07 |
| 修稿时间： | 2007-01-20 |
Base line correction method for near-fault accelerograms using Chi-Chi main shock record |
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| CHEN Yong,CHEN Kun,YU Yanxiang.Base line correction method for near-fault accelerograms using Chi-Chi main shock record[J].Earthquake Engineering and Engineering Vibration,2007,27(4):1-7. |
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| Authors: | CHEN Yong CHEN Kun YU Yanxiang |
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| Institution: | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | By selecting the representative accelerograms of 246 stations from Chi-Chi main shock as basic data,and reviewing kinds of overseas and internal base line correction methods,we make process as follows:(1)Judging the existence of permanent displacement(PD) in accelerograms to choose a method.(2)Finding out the permanent balance point of displacement history to determe the best linear-fitting to revise original accelerogram.By revising the original accelerogram,the graphs of PD isoline macth the graphs of GPS isoline closely.A conclusion is drawn according to the revised results: the three models of oscillating,rebounding and extending are the mechanism that controls the states of PD. |
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| Keywords: | Chi-Chi main shock base line correction methods permanent displacement(PD) linear-fitting permanent balance |
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