A seismological overview of long-period ground motion
A seismological overview of long-period ground motion
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DOI：
10.1007/s10950-007-9080-0
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发表时间：
2008-04-01
影响因子：
1.6
通讯作者：
Miyake, Hiroe
中科院分区：
文献类型：
--
作者：
Koketsu, Kazuki;Miyake, Hiroe
由于近年来高层建筑和储油罐等大型结构的数量迅速增加，长周期地震动已成为越来越重要的考虑因素。大型俯冲带地震和中大型地壳地震可以借助路径效应在遥远的沉积盆地中产生远源长周期地震动。近断层长周期地震动大部分是由前向破裂方向性的源效应产生的。远源长周期地震动主要由表面波组成，其持续时间比近断层长周期地震动更长。它们首先在 1968 年十胜大地震和 1966 年帕克菲尔德地震的地震图中被识别出来，并且它们的识别已应用于 1964 年新泻地震和更早的地震。即使没有地震图，我们也可以通过液体晃动对储罐损坏的调查来识别远源长周期地震动。
Long-period ground motion has become an increasingly important consideration because of the recent rapid increase in the number of large-scale structures, such as high-rise buildings and oil storage tanks. Large subduction-zone earthquakes and moderate to large crustal earthquakes can generate far-source long-period ground motions in distant sedimentary basins with the help of path effects. Near-fault long-period ground motions are generated, for the most part, by the source effects of forward rupture directivity. Far-source long-period ground motions consist primarily of surface waves with longer durations than near-fault long-period ground motions. They were first recognized in the seismograms of the 1968 Tokachi-oki and 1966 Parkfield earthquakes, and their identification has been applied to the 1964 Niigata earthquake and earlier earthquakes. Even if there is no seismogram, we can identify far-source long-period ground motions through the investigation of tank damage by liquid sloshing.