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RISK ANALYSIS AND ADVANCED TECHNOLOGIES FOR INFRASTRUCTURE

基础设施风险分析和先进技术

基本信息

批准号：
12574003
负责人：
OKIMURA Takashi
金额：
$ 5.18万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

项目摘要

Urban risk assessment for earthquake was proposed last year by using geo-data base. In that method) the threshold value employed to evaluate the urban risk assessment for earthquake was different at the measuring line, and the liquefaction did not considered in that method. These some problems ware modified in this year. The wave propagation model in which three-dimensional geological boundary condition was taken into was used and one-dimensional model was used for shallow layers. The same threshold value can be obtained. And for the coastal area, the damage distribution of wooden house was agreed to the calculated one that was obtained by the effective stress analysis that was made in order to consider the influence of liquefaction.The ground motion estimation methodology was researched. The shape interpolation method has already been proposed without consideration of local site amplification characteristics. In order to enhance this methodology, the ground information based on microtremor was analyzed and then an estimation method for the ground predominant period was introduced. It has been shown that the integral of H/V spectra ratio has a good relation with that of the frequency transfer function. The enhanced methodology was applied, to microzonation of Chi-Chi Village to the epicenter during the 1999 Chi-Chi, Taiwan Earthquake.Two techniques using GIS for the measure against slope failure disaster are proposed. They are 1) a technique of extracting dangerous slopes and zones suffered from slope failure, by DEM and land use data, 2) a technique of extracting dangerous area of slope failure due to the rainfall and show the result in the map to distribute the information to local residents. These techniques can be applied to many places where these data are available. Minami Ward in Yokohama City was selected as the study area, and the obtained result was a satisfactory one.

利用地理数据库进行城市地震危险性评估是去年提出的。在该方法中，城市地震危险性评估所采用的阈值在测线上是不同的，并且该方法没有考虑液化。这些问题在今年得到了改进。采用考虑三维地质边界条件的波传播模型，浅层采用一维模型。可以获得相同的阈值。对于沿海地区，考虑液化影响，将木结构房屋的损伤分布与有效应力分析得到的损伤分布进行了比较，并对地震动估计方法进行了研究。已有的形状插值方法没有考虑局部场地放大特性。为了进一步完善该方法，分析了基于地脉动的地震动信息，提出了一种地卓越周期的估计方法。结果表明，H/V谱比的积分与频率传递函数的积分有很好的关系。本研究以1999年台湾集集地震为例，以集集村为研究区域，提出两种以GIS为基础的边坡崩塌灾害防治技术。利用DEM和土地利用数据，提取危险边坡和边坡失稳区;提取降雨引起的边坡失稳危险区，并将结果显示在地图上，将信息分发给当地居民。这些技术可以应用于许多有这些数据的地方。选择横滨市南区作为研究区域，得到了令人满意的结果。