Estimation of Strong Ground Motions based on the Arerage Characteristics of Accelerograms Recorded on Hard Ground

本文描述了潮汐冲积层的平均强震和强震估计。研究的数据库包括四种数据集。具体而言，本研究主要使用了加利福尼亚州、墨西哥和智利的数据集。在18次地震中，水平分量的加速度记录为388次。这些加速度记录记录在坚硬土层的地面上。讨论了最大加速度Amax和最大速度Vmax的几种衰减曲线，并利用加利福尼亚、墨西哥和车勒的数据集，阐明了平均地震动烈度、反应谱和标准差。对两种强震进行了评价。其中一次是加藤8.0级地震，震中距离X=52.5公里，另一次是关西地区7.6级地震，X=33公里。分别在东京和大阪估算了深部冲积堆积体和中深部堆积体顶部的强震，并将这些结果与1995年1月Hyogoken Nanbu地震的地面运动进行了比较。地震引起的AMAX与估计的AMAX水平相同，但地震的Vmax是估计的平均速度的两倍。

This paper describes average strong ground motions and estimation ofstrong motion at tipical alluvial deposits. Data-base for the study in-clude four kinds of data-set. Espcially, data-set of California, Mexico and Cile is mainly used for the study. Acceleration records of horizon-tal components are 388 during 18 earthquakes. These accelererograms are recorded on the ground surface of hard soil layrs. Several attenuation curves of maximum acceleration Amax and maximum velocity Vmax are dis-cussed each other.Using the data-set of California, Mexico and Chele, the average ground-motion stregth, response spectra and standard deviation are clarified. Two kind of strong motion are evaluated. One of them is a earthquake of magnitude M8.0 and hypocentral distance X=52.5km for Kato earthquake and the other is M7.6, X=33km for Kansai district. Strong-motion at the top of deep alluvial deposit and moderate depth deposit are estimated in Tokyo and Osaka respectively.These results are compared with the ground motions durion the Hyogoken Nanbu earthquake in January of 1995. Amax due to the earthquake is same level forthe estimated Amax, but Vmax of the earthquake is tweice of the estimated average velocity.