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在2008年5月12日汶川MS8.0级特大地震中,中国大陆观测台网系统获得了丰富的主震、余震加速度记录,为开展相关的地震研究工作提供了十分难得的基础资料。本文以发震断层附近观测台站的主震记录为基础数据,根据台站所在的场地条件及其与发震断层的相互位置关系,分析了此次地震中近断层的地震动峰值空间分布特征、方向性效应、上下盘特性和典型记录加速度或速度结果等,简单讨论了发震断层性质和地形对震害分布的影响。
During Wenchuan MS8.0 earthquake on May 12, 2008, the observatory network in the Chinese mainland has obtained abundant records of acceleration of major earthquakes and aftershocks, providing very rare basic data for the related seismic research. In this paper, based on the recorded data of the main shock near observatory stations near the seismogenic fault, the peak spatial distribution of near-fault ground motions in this earthquake is analyzed according to the site conditions of the station and its mutual position with the seismogenic fault , Directional effect, the characteristics of the upper and lower disc and the typical acceleration or velocity of the record, simply discussed the impact of seismogenic faults and topography on the distribution of earthquake damage.