具有地域特性的设计地震动参数确定——以武罐高速公路为例  

Defining on Design Ground Motion Parameters with Regional Characteristics——A Case Study of Wu-Guan Freeway

作　　者：赵泽贤[1,2] 王爱国[1,2] 孙崇绍[2] 

机构地区：[1]中国地震局地震预测研究所兰州基地,甘肃兰州730000 [2]中国地震局兰州地震研究所,甘肃兰州730000

出　　处：《地震研究》2012年第3期367-373,442,共7页Journal of Seismological Research

基　　金：交通部西部交通建设科技项目<武罐高速公路抗震优化设计及灾害防治技术研究>;中国地震局地震预测所基本科研业务专项<甘肃古浪和四川汶川两次8级大震构造区对比研究>联合资助

摘　　要：分析了甘肃陇南武罐高速公路所处陇南地区强震动记录的地形效应及频谱特征,研究了在地震危险性概率计算中地震动地域特性的简化与抽象过程,应用地震动记录地形效应及地域频谱特征对重大工程地震危险性计算结果进行调整,从而给出具有地域特性的设计地震动参数。结果表明:地震危险性概率分析计算结果与地域地震动特征分析结果之间有一定差异,根据地震动特征分析结果,对危险性计算结果中动力放大系数βmax和特征周期T进行一定的调整,以给出适合本区特征的抗震设计地震动参数。We analyzed the topographic effects and frequency spectrum characteristics of strong motion recordings in Longnan region where Wu-Guan freeway located and studied the simplifying and abstract process to regional characteristics of ground motion in seismic risk probability calculation. Applying the topographic effects and fre- quency spectrum characteristics of strong motion recordings to adjust the calculation results of seismic risk proba- bility for major engineering, we obtained the design ground motion parameters with regional characteristics. The results show that there are certain differences between the calculation results of seismic risk analysis and the anal- ysis results of regional seismic characteristics. Basing on ground motion characteristics, we adjusted the power amplification coefficient βmax and characteristic period T in the calculation results of seismic risk analysis to give the seismic design ground motion parameters which was fit for the study region.

关 键 词：设计地震动参数 地域特性 反应谱 特征周期 武罐高速公路 

分 类 号：P315.9[天文地球—地震学]