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

本文介绍了典型冲积矿床的平均强地面运动和强地面运动的估计。本研究的数据库包括四种数据集。其中，加州、墨西哥和智利的数据集主要用于研究。18次地震中水平分量的加速度记录为388。这些加速度图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。利用加利福尼亚、墨西哥和Chele的数据集，澄清了平均地震动强度、响应谱和标准差。对两种强运动进行了评价。其中，加藤地震为8.0级地震，震源距离X=52.5km，关西地区为7.6级地震，震源距离X=33km。在东京和大阪分别估计了深冲积矿床顶部强运动和中深度矿床顶部强运动。这些结果与1995年1月南部小府地震时的地面运动进行了比较。地震引起的最大速度与估计的最大速度相同，但地震的最大速度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.