Seismic hazard prediction using multispectral amplification maps in a complex topographic area: A case study of Qiaozhuang town, Sichuan Province, Southwest China

作     者：LUO Yong-hong XU Qiang ZHAN Wei-wei GRELLE Gerardo 

作者机构：State Key Laboratory of Geo-Hazard Prevention and Geo-Environment ProtectionChengdu University of TechnologyChengdu 610059China Department of Civil and Environmental EngineeringTufts UniversityMedfordMA 02155USA Department of Civil and Environment EngineeringUniversity of RomeRome 00184Italy 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2022年第19卷第3期

页      面：726-739页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：financially supported by the Funds for Creative Research Groups of China(Grant No.41521002) the National Natural Science Foundation of China(Grant No.42077257) the Open Fund of the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection(Grants No.SKLGP2019K024 and No.SKLGP2019K006 assigned for G.Grelle’s competition proposal) 

主　　题：Seismic hazard prediction Multispectral amplification map topographic effects Stratigraphic effects SiSeRHMap Wenchuan earthquake 

摘      要：Earthquakes can cause widely distributed slope failures and damage in mountainous *** accurate prediction of ground motions in mountainous areas is essential for managing the seismic risk of urban cities near mountains but is restricted primarily by complex seismic site amplification effects in areas of uneven *** study selected Qiaozhuang town located in the Qingchuan–Pingwu fault zone,Southwest China,as a case study.A simulator for mapped seismic responses using a hybrid model(Si Se RHMap)was applied to compute the multispectral seismic topographic amplification maps at the three slope units surrounding Qiaozhuang town(Weigan hill,***,and ***).Post-earthquake damage survey maps,1 D seismic site response spectral ratios,and H/V spectral ratios of earthquake data were used to validate the computed seismic site amplification factors and resonance *** results suggest that strong topographic amplification effects usually occur at distinct slope locations,such as hilltops,convex slope positions,upslope,and narrow *** computed topographic amplification factors in the study area reached up to 2.4 at upslope or hilltops,and the resonance frequencies were between 3 and 10 *** effects can be as important as stratigraphic effects when assessing seismic amplification effects in the study *** conclude that both topographic and stratigraphic effects should be considered in the comprehensive seismic hazard assessment of the study area or other similar mountain towns.