北京盆地结构对长周期地震动反应谱的影响OA北大核心CSCDCSTPCD
A study on long-period response spectrum of ground motion affected by basin structure of Beijing
建立了北京盆地含起伏地形的地下介质三维速度结构模型,以有限差分方法对盆地内的3次地震动进行了数值模拟.计算了地表加速度反应谱,论证了反应谱的有效周期范围,从而获得了盆地结构对长周期段反应谱的平均放大系数,并对不同周期时反应谱的平均放大系数进行了分区,为今后城市的合理规划和长周期建筑物的建设提供了抗震设防参考.最后对反应谱平均放大系数与等效沉积物厚度之间的关系进行了回归,得出了反应谱放大系数随沉积物厚度增大而增强,以及随周期增大而减弱等结论.
We built an underground 3-dimensional velocity structure model including topography, and simulated three earthquakes spreading through the basin by finite difference method. Then we computed the ground acceleration response spectrum, and analyzed its effective period span, and acquired its average amplification factor on long-period part, which is related to basin structure. After that, we made the zonation of amplification factors on different period, givin…查看全部>>
付长华;高孟潭;陈鲲
中国 北京 100081 中国地震局地球物理研究所中国 北京 100081 中国地震局地球物理研究所中国 北京 100081 中国地震局地球物理研究所
天文与地球科学
盆地结构地震动长周期反应谱
basin structure ground motion long period response spectrum
《地震学报》 2012 (3)
374-382,9
国家社科基金重大项目(11&ZD054)和地震行业科研专项(201108002)共同资助.
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