水工建筑物强震动加速度记录的分析处理
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摘要
从工程应用角度详细介绍水工强震动加速度记录正确处理分析的方法与原理。主要介绍了震源的评估原理,强震动加速度记录预处理过程中单位换算、奇异点剔除、基线校正、滤波除噪等步骤的方法原理,后处理分析中一次、二次积分、谱分析原理。阐述了利用强震动加速度记录进行震害快速评估原理。文中以二滩拱坝强震监测台阵监测到的一次强震加速度记录的处理过程为例,以图表形式直接明了地强调指出了强震动加速度记录处理中容易发生错误的过程,并提出相应的处理方法。
In this paper,the data processing methods and their theories for analyzing acceleration records obtained from strong motion observation arrays in hydraulic structures are introduced in detail.The data processing methods include seismic source assessment method,and some steps of data pretreatment process,such as data calibration,singular points eliminating,baseline correcting,de-noising by a filter,and first-order and second-order integral of acceleration and spectrum transform which belongs to data routine process.The calculation principles of the coefficient assessment of earthquake disaster are also studied.By taking a case study of strong motion data recorded at Ertan arch dam stations as an example,the paper points out the steps,which easily go wrong in data processing.And the corresponding countermeasures are proposed.
In this paper,the data processing methods and their theories for analyzing acceleration records obtained from strong motion observation arrays in hydraulic structures are introduced in detail.The data processing methods include seismic source assessment method,and some steps of data pretreatment process,such as data calibration,singular points eliminating,baseline correcting,de-noising by a filter,and first-order and second-order integral of acceleration and spectrum transform which belongs to data routine process.The calculation principles of the coefficient assessment of earthquake disaster are also studied.By taking a case study of strong motion data recorded at Ertan arch dam stations as an example,the paper points out the steps,which easily go wrong in data processing.And the corresponding countermeasures are proposed.
引文
[1]陈厚群,苏克忠,彭克中,等.中国水工结构重要强震数据及分析[M].北京:地震出版社,2000:1-8.CHEN Houqun,SU Kezhong,PENG Kezhong,et al.The important data on strong motion and analysis in China hydraulic structures[M].Beijing:China Seismological Press,2000:1-8.(in Chinese)
[2]郭明珠,杨毕康,邢国良.二滩拱坝强震台阵记录的四川普格加速度记录[J].地震工程与工程振动,2002,22(6):12-17.GUO Mingzhu,YANG Bikang,XING Guoliang.Accelerograms recorded at Ertan arch dam strong ground motion stations from Puge,Sichuanearthquake[J].Journal of Earthquake Engineering and Engineering Vibration,2002,22(6):12-17.(in Chinese)
[3]DL/T5416-2009水工建筑物强震动安全监测技术规范[S].DL/T5416-2009 Specification of Strong Motion Safety Monitoring for Hydraulic Structures[S].(in Chinese)
[4]郭永刚,苏克忠,常廷改.大坝强震监测与震害预警问题的探讨[J].大坝与安全,2006(2):7-10.GUO Yonggang,SU Kezhong,CHANG Tinggai.Discussion on dam strong earthquake monitoring and earthquake damage warning[J].Dam&Safety,2006(2):7-10.(in Chinese)
[5]郭永刚,许亮华,水小平.基于脉冲响应数据的ARMA法建模以及模态参数识别[J].地震工程与工程振动,2006,26(5):167-171.GUO Yonggang,XU Lianghua,SHUI Xiaoping.ARMA model building and system identification by using impulse time response[J].Journal ofEarthquake Engineering and Engineering Vibration,2006,26(5):167-171.(in Chinese)
[6]许亮华,郭永刚,杜修力.改进的EMD方法及大坝强震反应信号应用分析[J].中国水利水电科学研究院学报,2011,9(3):229-235.XU Lianghua,GUO Yonggang,DU Xiuli.Improved EMD and application in data processing of dam’s strong earthquake response[J].Journal ofChina institute of Water Resources and Hydropower Research,2011,9(3):229-235.(in Chinese)
[2]郭明珠,杨毕康,邢国良.二滩拱坝强震台阵记录的四川普格加速度记录[J].地震工程与工程振动,2002,22(6):12-17.GUO Mingzhu,YANG Bikang,XING Guoliang.Accelerograms recorded at Ertan arch dam strong ground motion stations from Puge,Sichuanearthquake[J].Journal of Earthquake Engineering and Engineering Vibration,2002,22(6):12-17.(in Chinese)
[3]DL/T5416-2009水工建筑物强震动安全监测技术规范[S].DL/T5416-2009 Specification of Strong Motion Safety Monitoring for Hydraulic Structures[S].(in Chinese)
[4]郭永刚,苏克忠,常廷改.大坝强震监测与震害预警问题的探讨[J].大坝与安全,2006(2):7-10.GUO Yonggang,SU Kezhong,CHANG Tinggai.Discussion on dam strong earthquake monitoring and earthquake damage warning[J].Dam&Safety,2006(2):7-10.(in Chinese)
[5]郭永刚,许亮华,水小平.基于脉冲响应数据的ARMA法建模以及模态参数识别[J].地震工程与工程振动,2006,26(5):167-171.GUO Yonggang,XU Lianghua,SHUI Xiaoping.ARMA model building and system identification by using impulse time response[J].Journal ofEarthquake Engineering and Engineering Vibration,2006,26(5):167-171.(in Chinese)
[6]许亮华,郭永刚,杜修力.改进的EMD方法及大坝强震反应信号应用分析[J].中国水利水电科学研究院学报,2011,9(3):229-235.XU Lianghua,GUO Yonggang,DU Xiuli.Improved EMD and application in data processing of dam’s strong earthquake response[J].Journal ofChina institute of Water Resources and Hydropower Research,2011,9(3):229-235.(in Chinese)
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