基于地震危险性分析的场地地震动持时特性研究

Study on seismic duration characteristics based on the seismic risk analysis

通过地震危险性分析计算，认为场地地震动持时主要决定于近场地震影响；潜在震源区震级上限越大，场地地震动持时越大；潜在震源区其它地震活动性参数（年发生率、起算震级、ｂ值）减小或设防水准降低，场地地震动持时增加，且地震动持时增加幅度较小。

Based on the seismic risk analysis, some results are obtained as follows: the seis- mic duration in site is mainly dependent on near field earthquake effects, the larger the magni- tude in latent source zone, the bigger the site ground motion is; Other seismicity parameters (such as V, Mob) have few influences on the seismic duration.