唐山丰南M4.1级地震强震记录分析
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摘要
2010年4月9日唐山丰南发生M4.1级地震,津冀地区共有36个强震台站获取到强震记录,记录的最大加速度为58.92cm/s2,通过对比强震记录的峰值,发现该地震竖向峰值比水平向大,在三个分量上加速度傅氏谱谱型以多峰为主。通过对强震记录频谱特征进行分析,得出随着震中距的增大,反应谱高频成分衰减快于低频成分,竖向与水平向加速度比值与常规认为的1/2—2/3差别较大。通过对本次强震动记录反应谱标定并结合唐山地区3.5级以上地震记录,获得唐山地区土层场地反应谱谱型参数。
The strong motion of Tanshan-Fengnan M4.1earthquake on April 9, 2010 was recorded by 36 strong motion stations in Hebei and Tianjin, and the maximum acceleration is 58.92cm/s2. The vertical peak value is greater than the horizontal's through the comparison of the strong motion records. The Fourier acceleration spectrums are mainly in multimodal on the three components. By analysis of the spectral characteristics we found that with the increase of epicenter distance, the high frequency components of response spectrum decay faster than the low-frequency. The acceleration ratio of veneration and horizon is greatly different from the conventional view of 1/2—2/3. The soil site response spectrum parameters in Tangshan are obtained through the strong motion record and the response spectrum’s calibration.
The strong motion of Tanshan-Fengnan M4.1earthquake on April 9, 2010 was recorded by 36 strong motion stations in Hebei and Tianjin, and the maximum acceleration is 58.92cm/s2. The vertical peak value is greater than the horizontal's through the comparison of the strong motion records. The Fourier acceleration spectrums are mainly in multimodal on the three components. By analysis of the spectral characteristics we found that with the increase of epicenter distance, the high frequency components of response spectrum decay faster than the low-frequency. The acceleration ratio of veneration and horizon is greatly different from the conventional view of 1/2—2/3. The soil site response spectrum parameters in Tangshan are obtained through the strong motion record and the response spectrum’s calibration.
引文
崔建文,李世成等,2006.云南分区地震动衰减关系.地震研究,29(4):386—391.
郭慧,江娃利,谢新生,2011.对1976年河北唐山MS7.8级地震地表破裂带展布及位移特征的新认识.地震地质,33(3):506—524.
虢顺民,李志义,程绍平等,1977.唐山地震区域构造背景和发展模式的讨论.地质科学,10(4):305—307.
梅世蓉,胡长和等,1982.1976年唐山地震.北京:地震出版社,105—115.
中华人民共和国国家标准,2001.中国地震动参数区划图(GB18306-2010).北京:中国标准出版社.
中华人民共和国国家标准,2010.建筑抗震设计规范(GB50011-2010).北京:中国建筑工业出版社.
郭慧,江娃利,谢新生,2011.对1976年河北唐山MS7.8级地震地表破裂带展布及位移特征的新认识.地震地质,33(3):506—524.
虢顺民,李志义,程绍平等,1977.唐山地震区域构造背景和发展模式的讨论.地质科学,10(4):305—307.
梅世蓉,胡长和等,1982.1976年唐山地震.北京:地震出版社,105—115.
中华人民共和国国家标准,2001.中国地震动参数区划图(GB18306-2010).北京:中国标准出版社.
中华人民共和国国家标准,2010.建筑抗震设计规范(GB50011-2010).北京:中国建筑工业出版社.
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