中国东北地区及邻区土层场地地震动强度包络函数参数衰减关系研究

利用土层场地数字化强震动记录,研究适用于东北地区及邻区的强震动包络函数参数衰减关系.数据集由2008年后研究区内发生的29次地震事件的水平向和垂直向强震动记录构成.经过基线校正和滤波处理后,结合三段式包络函数模型,应用能量持时计算t1和t2,通过最小二乘法统计回归确定c值,得到了强震动包络函数参数的衰减关系公式.比较水...

A Study of the Attenuation Relationships of Strong Motion Envelop Function on Soil Site of Northeast and Adjacent Area in China

Utilizing digital strong motion records of soil site,it is possible that the attenuation relation of parameter of strong motion envelope function applied to northeast and adjacent regions.The data set consists of the horizontal and vertical strong motion records of 29 seismic events occurring in the study area after 2008.Basing on baseline correction and filtering and combining with the three-segment envelope function model,this is the basic materials.Using significant duration to calculate t1 and t2,meanwhile,determining parameter of c by least squares statistical regression,thus,we obtain the attenuation relation formula of the parameters of the strong motion envelope function.Being contrasted the calculations of horizontal and vertical shows that the differences between the two is not significant on the whole.At the same time,comparisons with other published results shows that there are still some differences between the paper and two scholars.The differences mainly due to the selection of the data set.The maximum amount of the data set at present can not completely satisfy the determination of the parameters of the regional strong motion envelope function and their attenuation relations in the northeast and adjacent regions.Firstly,the amount of the data set for research is small;secondly,the magnitude distribution is not uniform,and most of them are small magnitudes;lastly,the soil site enlarges obviously in determining the three parameters.