【摘要】 收集了来自156次地震的共计7 778条水平加速度记录。分别采用基于能量分布和震级-距离的地震动记录聚类分析方法,将7 778条水平加速度记录划分为12组,作为地震动记录数据库的基础数据。基于工程随机地震动的物理模型,采用窄带波群叠加方法合成了不同场地类别、震级和传播距离下的24组模拟地震动,包括100条每组的12个小样本组和300条每组的12个大样本组,共计4 800条模拟地震动时程,作为模拟地震动数据库的基础数据。利用聚类分组后的地震动记录和各分组模拟地震动,开发了基于Windows系统的工程随机地震动数据库系统,实现了地震动的检索以及时程、反应谱和相关地震信息的可视化及数据下载。更多还原

【Abstract】 Here, a total of 7 778 horizontal acceleration records from 156 earthquakes were collected. Based on the energy distribution and magnitude-distance cluster analysis method, 7 778 horizontal acceleration records were divided into 12 groups taken as the basic data of a ground motion record database. Based on the physical model of engineering random ground motion, 24 groups of simulated ground motions with 12 small sample groups of 100 samples each group and 12 large sample groups of 300 samples each group, under different site types, magnitudes and propagation distances, were synthesized by using the narrow band wave groups superposition method. A total of 4 800 simulated ground motion time histories were taken as the basic data of a simulated ground motion database. The database system of engineering random ground motion based on Windows system was developed by using the ground motion records after clustering and various groups of simulated ground motions to realize retrieval of ground motions, visualization of time histories, response spectra and related seismic information and data download.更多还原