四川省v_(S30)数据构建及其应用——以四川汶川8.0级地震为例  

Construction and application of v_(S30)data in Sichuan Province:a case study of the Wenchuan M_(S)8.0 earthquake

作　　者：张灿 郭红梅[1] 赵真 鲁长江[1] 张莹[1] 何宗杭 ZHANG Can;GUO Hongmei;ZHAO Zhen;LU Changjiang;ZHANG Ying;HE Zonghang(Sichuan Earthquake Agency,Chengdu 610041,Sichuan,China)

机构地区：[1]四川省地震局,四川成都610041

出　　处：《地震工程学报》2025年第3期671-679,共9页China Earthquake Engineering Journal

基　　金：中国地震局地震应急与信息青年重点任务(CEA_EDEM(ITNS)-2023)。

摘　　要：地下30 m平均剪切波速(v_(S30))作为场地划分的一项重要参数,在国内外建筑和构筑物的抗震设计规范及局部场地影响的校正中得到广泛应用。然而,目前在中国地区广泛使用的美国地质勘探局(USGS)提供的v_(S30)数据适用性仍需进一步考证。文章通过四川省地形坡度与浅层平均波速之间的关系以及v_(S30)与浅层平均剪切波速之间的关系,制作四川省v_(S30)数据,并将其应用于汶川8.0级地震的地震烈度评估中。结果显示:相较于广泛使用的USGS的v_(S30)数据,本研究得到的四川省v_(S30)数据与实际情况更为接近,使用该数据进行场地校正过的汶川8.0级地震烈度快速评估结果在重灾区和极重灾区区县的判定上更为准确。研究结果可以提高日后四川省地震应急产出的准确性,为震后应急指挥决策、应急救援工作提供参考资料。As an important parameter for site classification,the average shear wave velocity at a depth of 30 m(v_(S30))is widely used in domestic and international seismic design codes for buildings and structures,as well as in the correction of local site effects.However,the applicability of the v_(S30)data commonly used in China,which are provided by the United States Geological Survey(USGS),requires further verification.Based on the correlation between terrain slope in Sichuan Province and shallow average wave velocity,as well as the relationship between v_(S30)and shallow average shear wave velocity,this paper proposes a v_(S30)dataset for Sichuan Province paper.The dataset is then applied to the seismic intensity assessment of the Wenchuan M_(S)8.0 earthquake.The results show that compared with the widely used v_(S30)data provided by USGS,the v_(S30)results for Sichuan Province obtained from this study are closer to the actual situation.The rapid seismic intensity assessment of the Wenchuan M_(S)8.0 earthquake using the v_(S30)data in this study provides more accurate judgments of heavy and severe disaster areas.The results can improve the accuracy of seismic emergency outputs in Sichuan Province in the future,offering valuable first-hand reference materials for post-earthquake emergency command and rescue operations.

关 键 词：地下剪切波速 地震动参数 地震烈度 场地校正 

分 类 号：P319.56[天文地球—固体地球物理学]