摘要
分析了2014年8月3日云南鲁甸6.5级地震的发生背景及震害特征,介绍了ShakeMap_CNST震动图系统的设计思路和实现原理及地震动参数的校正方法,并将其应用于鲁甸6.5级地震的震动图预测中,进一步分析了震区场地条件对局部震害的影响。结果表明,震动图预测的地震动特征与现场宏观调查的结果总体上是相适应的,最后对震动图系统的优缺点及应用前景进行了探讨。
In this study,we applied the ShakeMap_CNST system,which considers the epicenter location,earthquake magnitude,seismic tectonic background,and focal mechanism,for the rapid prediction of the ground motion spatial distribution of the Ludian,Yunan 6.5earthquake of August 3,2014.Using a method for estimating the seismic motion attenuation relationship in the Yunnan area,we calculated the PGAand PGVvalues of the bedrock surface in the epicenter area.Based on the observation results of strong ground motion by the stations and by using the distance weighted interpolation method,we recalculated the PGAand PGVvalues as being in the range of 30×30km^2 around the stations.In the calculation process of the seismic ground motion parameters,we increased the weight of the actual observation data to recalculate the ground motion data of each grid node and then drew a seismic intensity map.From the map,we can see that the scope of the VII-degree zone was obviously larger than originally believed.The field survey results also show that the houses were damaged more seriously in the towns of Laodian,Xindian,and Xiaohe,which are located in the eastern part of Qiaojia county in which earthquake damage was more significant.Therefore,the spatial distribution characteristics of the ground motion predicted by this system are consistent with field survey results.
出处
《地震工程学报》
CSCD
北大核心
2016年第4期647-651,共5页
China Earthquake Engineering Journal
基金
中国地震局"三结合"课题(163101)
地震星火计划项目(XH2015044Y)
