唐山丰南M4.1级地震强震记录分析  

Analysis of Strong Motion Records of Tangshan-Fengnan M4.1 Earthquake

作　　者：冉志杰[1] 杨歧焱[1] 周月玲[1] 孙丽娜[1] 吕国军[1] 孟立朋[1] 范强[1] 彭远黔[1] 

机构地区：[1]河北省地震局,石家庄050022

出　　处：《震灾防御技术》2012年第4期367-376,共10页Technology for Earthquake Disaster Prevention

基　　金：河北省科学技术研究与发展计划项目"强震动记录在唐山地区抗震设防中的应用研究"(编号11276905D)资助

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.

关 键 词：强震动记录 加速度峰值 强震动台站 丰南地震 频谱特征 

分 类 号：P315[天文地球—地震学]