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Development of Prototype of Earthquake Damage Assessment System for Highway Networks

公路网震害评估系统原型开发

基本信息

批准号：
10558058
负责人：
YAMAZAKI Fumio
金额：
$ 7.87万
依托单位：
The University of Tokyo
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 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10558058/
关键词：
Expressway Earthquake Damage Traffic Control GIS Earthquake Ground Motion Peak Ground Acceleration Spectrum Intensity 地震計ネットワーク

项目摘要

In order to gather earthquake information at an early stage and to establish efficient traffic control, Japan Highway Public Corporation (JH) had deployed 123 accelerometers along its expressways before the 1995 Hyogoken-Nanbu (Kobe) Earthquake. JH further deployed 202 new seismometers after the Hyogoken-Nanbu Earthquake. The new instruments can measure the spectrum intensity and the Instrumental JMA intensity as well as the peak ground acceleration (PGA). Using earthquake information from these instruments. JH closes expressways for safety inspection if the PGA exceeds 80 cm/sィイD12ィエD1. This current regulation criterion needs to be examined considering the increase of number of instruments, the higher sensitivity of new instruments and the recent experiences for damaging and non-damaging earthquakes in Japan.In this research, the relationship between the earthquake damage to expressway structures and the strong ground motion indices was investigated. The damage data of expressway structures in the Hyogoken-Nanbu Earthquake were collected and the ground motion indices along the expressways were estimated based on observed records using geographic information system (GIS) and Kriging technique. In this approach, the recorded data are satisfied at the recording sites and the attenuation relations of the strong motion indices are considered as a trend component Comparing these results, fragility curves for the expressway structures due to the Hyogoken-Nanbu Earthquake were constructed. Although the proposed fragility curves are still tentative, they may be used in damage estimation of expressway structures in Japan due to earthquakes. Combining with a seismometer network, the proposed methodology can be easily introduced to a real-time damage assessment of expressway networks.

为了在早期阶段收集地震信息并建立有效的交通控制，日本公路公共公司（JH）在1995年神户地震之前在其高速公路沿线部署了123个加速度计。日本气象厅在小古根-南部地震后进一步部署了202台新的地震仪。该仪器可以测量光谱强度和仪器JMA强度以及峰值地面加速度（PGA）。利用这些仪器的地震信息。如果PGA超过80cm /s， JH将关闭高速公路进行安全检查。考虑到仪器数量的增加，新仪器的更高灵敏度以及最近日本破坏性和非破坏性地震的经验，需要对当前的监管标准进行审查。本文研究了高速公路结构震害与强地震动指标之间的关系。利用地理信息系统（GIS）和Kriging技术，收集了小谷垦-南部地震中高速公路结构的震害数据，并根据观测记录估算了高速公路沿线的地震动指数。该方法在满足记录点记录数据的情况下，将强震指标的衰减关系作为趋势分量，构建了小谷肯-南部地震下高速公路结构的易损性曲线。虽然所提出的易损性曲线仍是初步的，但它们可用于日本高速公路结构在地震中的损伤评估。结合地震仪台网，该方法可以很容易地应用于高速公路网的实时损伤评估。