PGV/PGA和PGD/PGA随震级和震中距变化的研究

Variation of the PGV/PGA and PGD/PGA along with the Change of Magnitudes and Epicentral Distances

摘要:

以太平洋地震工程研究中心(PEER)和强震动观测系统组织委员会(COSMOS)记录的13次地震的486个台站的三分量地震动峰值数据为基础,按照震级和震中距大小将其分类,得到地震动的峰值比PGV/PGA和PGD/PGA与震级和震中距的关系。结果表明:峰值比随着震级的增大而增大,随着震中距的增大也增大。最后给出了峰值比与震级和震中距的衰减关系,以供抗震设计参考使用。

Abstract:

Taking three component peak ground accelerations from 13 earthquakes recorded by 486 stations,provided by Pacific Ocean Seismic Engineering Research Center （PEER） and Consortium of Organizations for Strong Motion Observation Systems （COSMOS） as the basis of study,peak ground accelerations are classified according to the magnitudes and the epicentral distances.The relations between the PGV/PGA,PGD/PGA and magnitude,epicentral distance are obtained.The result indicates that the ratio of peak value increases along with the magnitude and epicentral distance increasing.At last,attenuation relationship between the ratio of peak value and magnitude epicentral distance is presented which could be referenced in aseismic design.