唐山地区强震动记录的应用研究初探

The Preliminary Application of Strong Motion Record in the Tangshan Region

本文给出了唐山地区强震动记录应用研究的两个实例,提出了建筑结构采用时程分析时选用强震动记录的原则和方法,通过对唐山地区强震动记录的分析处理,得到了其峰值加速度及加速度反应谱,确定了本地区进行弹性时程分析时选用的强震动记录;研究了局部场地条件对地震动影响的唐山响堂三维强震动观测台阵,以唐山响堂台阵2号测井(地下32m)的基岩强震动作为输入,通过2号测井的土层剖面,利用2个一维土层地震反应分析程序,分别计算得到地表的峰值加速度和加速度反应谱,并把计算结果与同次地震相应的地表强震动记录峰值加速度与加速度反应谱进行了对比分析。

Two examples of application on strong motion record in the Tangshan region was performed in this paper. We propose principles and methods on how to select strong motion records in time history analysis of building structures. And then the ground acceleration and acceleration response spectrum are obtained by analyzing strong motion records of Tangshan region, the applicative ground motion record is selected to be used in elastic time history analysis. We study the effects of surface soil conditions on seismic motion of Xiangtang three dimensional array, the bedrock strong motions of the 2nd well-logging bedrock as ground motion input. With the soil profile data, we obtain the ground acceleration time history and acceleration response spectrum by two one-dimensional soil layer seismic response programs. Finally, the comparative analysis of peak ground acceleration and acceleration response spectrum from soil layer seismic response analysis and strong motion records of the same earthquake are carried out.