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Evaluation of Seismic Ground-Motion and Estimation of Seismic Disaster by Using Array Earthquake Observation Network in Kyoto Valley

京都谷地震动评价及地震灾害评估

基本信息

批准号：
10555200
负责人：
SUZUKI Yoshiyuki
金额：
$ 7.94万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

This study aims to construct methodologies in order to evaluate seismic ground-motions and to estimate seismic damages by making use of the array earthquake observation network in Kyoto area. The results obtained here are summarized as follows:The characteristics of observed seismic ground-motions are influenced by the geological structure of Kyoto valley and the structure of soil-layers at each observation station the array earthquake observation network.The important uncertain parameters in modeling structural systems and seismic excitations are investigated, and they are modeled as random variables. The analytical methods for stochastic identification of structural parameters and stochastic estimation of structural responses from observations of seismic accelerations on ground-structures are studied.In the 1995 Hyougoken-nanbu earthquake and 2000 Tottoriken-seibu earthquake, a large number of buildings were seriously damaged. The seismic damages of wood houses were investigated. In particular, the wood construction methods and techniques were closely examined in Hino-cho, Tottori. It is found that the damages of wood houses are influenced distinguishedly the construction methods of wood houses as well as the characteristics of seismic ground-motions.The prediction and estimation methods for the damages of buildings due to earthquakes were developed on the basis of past earthquake disasters such as the 1995 Hyougoken-nanbu earthquake and 2000 Tottoriken-seibu earthquake. The fragility curves for wood houses are proposed. To establish the prediction and estimation methods for seismic damages of wood houses, there are many uncertainties in structures, in particular, wood houses. Therefore the observation and experimental studies on uncertainties of dynamic properties are needed.

本研究的目的是利用京都地区的阵列地震观测网，建立评估地震地面运动和估计地震损害的方法。主要研究结果如下：观测地震动特性受京都河谷地质结构和地震观测网各观测站土层结构的影响，研究了结构体系和地震激励模型中重要的不确定性参数，并将其作为随机变量进行建模。研究了利用地面地震加速度观测值进行结构参数随机识别和结构响应随机估计的分析方法。在1995年兵库县南部地震和2000年鸟取县西部地震中，大量建筑物遭到严重破坏。对木结构房屋的震害进行了调查。特别是在鸟取县日野町，对木结构建筑方法和技术进行了仔细的研究。研究发现，木结构房屋的震害受木结构房屋的建造方法和地震地震动特性的影响较大，地震对房屋震害的预测和估计方法是在1995年兵库县南部地震和2000年鸟取县西部地震等过去地震灾害的基础上发展起来的。提出了木结构房屋的易损性曲线。木结构房屋的震害预测与评估方法的建立，需要考虑结构，特别是木结构房屋的不确定性。因此，需要对动力特性的不确定性进行观测和实验研究。