Broad-Scale Mapping of Ground Shaking for a Scenario Earthquake Using the Digital National Land

使用数字国家土地对地震情景进行大比例尺地面震动测绘

基本信息

批准号：
14550558
负责人：
MIDORIKAWA Saburoh
金额：
$ 2.24万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550558/
关键词：
Digital National Land Information Ground Shaking Map Attenuation Relationship Site Amplification Factor 2003 Miyagi-Ken-Oki Earthquake 2003 Miyagi-Ken-Hokubu Earthquake 2003 Tokachi-Oki Earthquake

项目摘要

In order to develop the broad-scale mapping technique of ground shaking for a scenario earth quake, attenuation characteristics of peak ground motions are examined based on strong motion recordings from 33 Japanese earthquakes. Considering the different attenuation rates from the regression analysis for the records, the attenuation relationships for peak ground acceleration and velocity, which are applicable to both shallow and deeper earthquakes, are proposed. According to local site effects, nonlinearity of site amplification is examined by using the ground motion records of the 2001 Geiyo earthquake and subsequent smaller events. The analysis of the amplification factors derived from the records of the Geiyo earthquake together with those of the 1989 Loma Prieta and 1994 Northridge earthquakes indicates that the nonlinear effect n peak ground velocity is not apparent up to the strain level of about 1×10^<-3>. Based on these results, the broad-scale mapping technique of ground shaking for a scenario earthquake is developed. In order to confirm the validity of the ground-shaking mapping techniques, the distributions of seismic intensity calculated from the techniques are compared with the actual isoseismal maps during the Miyagi-ken-oki earthquake on May 26, the Miyagi-ken-hokubu earthquake on July 26, and the Tokachi-oki earthquake on September 26 in 2003. A comparison for the earthquake shows that the computed maps are in good agreement with the observed map.

为了开发地面地震的大规模映射技术，基于33次日本地震的强烈运动记录，检查了峰地面运动的衰减特征。考虑到记录回归分析的不同衰减率，提出了适用于浅层和更深地震的峰值地面加速度和速度的衰减关系。根据本地现场效应，通过使用2001年Geiyo地震的地面运动记录和随后的较小事件来检查现场扩增的非线性。从地球地震记录中得出的放大因子以及1989年的Loma Prieta和1994年的诺斯里奇地震的分析表明，非线性效应n峰值地面速度尚不明显至约1×10^<-3>的应变水平。基于这些结果，开发了地面摇动的大规模映射技术。 In order to confirm the validity of the ground-shaking mapping techniques, the distributions of seismic intensity calculated from the techniques are compared with the actual isoseismal maps during the Miyagi-ken-oki earth shaking on May 26, the Miyagi-ken-hokubu earth shaking on July 26, and the Tokachi-oki earth shaking on September 26 in 2003. A comparison for the earthquake shows that the computed maps are in与观察到的地图很好地达成一致。