福建沿海城市长期受台湾地震影响,虽少有破坏发生,但震感明显,特别是高层建筑,经常有持续时间较长的摇晃。本文选取了福建省基岩台站记录到的252条宽频带水平向加速度记录,这些记录来自近年发生在台湾的35次不同震级的地震,震级范围Ms=4.0-6.8,震中距R=214-650 km,震源深度d=6-40 km,经回归统计得到福建地区远场基岩地震动衰减关系。从结果看,台湾地震在福建地区产生的地震动并不大,小于福建地区的抗震设防标准,但可以作为当地政府对台湾远场地震影响的判断和决策的参考。
Coastal cities of Fujian Province were influenced by Taiwan earthquakes for long-term.Although little damage was coused,but shaking was felt and had longer duration,specially for high-rise buildings.In this paper,252 broad-band horezontal acceleration records have been adopted from 35 Taiwan earthquakes in recent years(Magnitude Ms =4.0-6.8,epicentral distance R=214-650 km,focal depth d=214-650 km).Horizontal ground motion attenuation relation for far-field in Fujian region has been established from the acceleration records by regressive methods.Based on the results,the earthquake ground motions from Taiwan earthquakes are less than the seismic fortification criteria,but we can use them as a reference for local government as the Taiwan earthquakes judgments and decision-making.