新疆地区不同设防水准下设计地震动关系的研究

Study on Relationship of Design Seismic Ground Motion of Different Fortified Levels in the Xinjiang Region

通过分析新疆79个城市的地震危险性,获得了新疆地区50年超越概率63%(小震)、10%(中震)、2%(大震)的基岩峰值加速度及其相互比值,研究了地震环境与不同概率地震危险性分析结果之间的关系。结果表明,由中震地震动参数换算得到的小震、大震地震动参数不具备一致概率水平,不同概率水准下基岩峰值加速度的比值与地震环境密切相关。

Seismic hazard analysis results of 79 cities in Xinjiang are presented, and the bedrock peak ground accelerations under three seismic levels and their ratios are discussed, and then the relationship between earthquake environments and the seismic hazard analysis results of different exceeding probabilities have been researched. The results show that minor and major earthquakes calculated from moderate earthquake have not consisted probability and the ratios of bedrock peak accelerations under different exceeding probabilities are closely correlative with earthquake environments.