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Strong Motion and Seismic Risk of Large Urban Regions

大城市地区的强烈运动和地震风险

基本信息

批准号：
05044093
负责人：
TOKI Kenzo
金额：
$ 3.52万
依托单位：
Kyoto Univer.
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1993
资助国家：
日本
起止时间：
1993 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05044093/
关键词：
Seismic Hazards Strong Motion Observation Strong Motion Prediction Seismic Risk Assessment Historical Earthquake Active Fault Ground Earthquake Ground Motion

项目摘要

In order to develop precisely the methods of strong ground motion prediction and seismic microzonation in large urban regions, the joint researches between Japan and China were carried out by using the records of strong seismic ground motions and long-period microseisms in the Tangshan and Shanghai regions. To examine these methods, we used the data of seismic damage. To predict seismic activity from the Japan islands to the Heubei region, we investigated the mechanism of generation and transfer of tectonic stress by numerical experiments.Strong ground motions at 5 temporary observation stations in near-field of the Tangshan Earthquake were estimated by the method using acceleration records of after shocks with magnitude of about 5 as an empirical Green function. Resulted seismic ground motions were corresponding with damage data. For example, the estimated accelerograms has less peak values than those of proposed by Chinese Intensity Table at the station of Cement Plant, which is located at rock site and had slight damage, even though the plant is in the inside of epicentral region with intensity XI. It shows that this method can simulate strong ground motions of high frequency reasonably.We estimated seismic risk in the Shanghai region on the basis of seismic activity in and around Shanghai and vibratile characteristics of ground obtained from the observation of long-period microseisms. We also estimated seismic response for space frame structures and seismic risk of urban lifelines in the central Shanghai.From large numerical experiments, it was shown that volcanic and seismic activities in the Japan islands were connected with those in the China continent by the transfer of tectonic stress.

为了准确地发展大城市地区的强震预测和地震小区划方法，中日两国利用唐山和上海地区的强震和长周期微震记录进行了联合研究。为了检验这些方法，我们使用了地震破坏的数据。为了预测日本列岛至河北地区的地震活动，我们用数值试验方法研究了构造应力的产生和传递机制，并利用唐山地震近场5级左右余震的加速度记录作为经验绿色函数，估算了唐山地震近场5个临时台站的强地面运动。结果表明，地震地震动与损伤数据相吻合。如水泥厂地震台位于XI度震中区内，但由于水泥厂位于岩石场地，破坏程度较轻，其地震加速度估计值的峰值小于中国烈度表建议值。本文根据上海及周边地区的地震活动情况和长周期地震动观测得到的地面振动特征，对上海地区的地震危险性进行了估计。通过大量的数值试验表明，日本列岛的火山活动和地震活动通过构造应力的传递与中国大陆的火山活动和地震活动联系在一起。