DEVELOPMENT OF SYSTEM FOR EVAUATING SEISMIC GROUDA MOTION AND HAZARD IN IRREGULARLY STRATEFIED LAYER BASED ON MICROTREMOR MEASUREMENTS

基于微动测量的不规则地层地震格鲁达运动和灾害评估系统的开发

基本信息

批准号：
12555158
负责人：
TOKIMATSU Kohji
金额：
$ 6.72万
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 (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

The object of this study is to develop a method for estimating shear wave velocity structures as well as ground motions and resulting hazards in the area involving irregularly stratified deposits, based on microtremor measurements using either array of sensors or a single sensor, or a combination of both. For this purpose, (l)data acquisition system is developed for extracting surface wave characteristics (I.e., dispersion data and H/V spectra) in microtremors ; (2) analysis method is developed to estimate one and two-dimensional shear wave velocity profiles based on the inversion of either microtremor dispersion data or H/V spectra, or both ; (3) microtremor measurements are conducted at several arias where shear wave velocity is known and the effectiveness of the proposed method is examined ; (4) strong motion array observation is also conducted in one of the areas to characterize spatial variation in ground motions across irregularly stratified deposits ; (5) two-dimensional dynamic … More response analysis is conducted to evaluate ground motion characteristics in the area and to compare with the observed records; and (6) the effects of surface geology on building damage is examined at the areas of building damage during recent strong earthquakes, based on the proposed method and analysis.It is shown that(1) The one- and two-dimensional shear wave velocities determined by microtremor measurements using either array of sensors or a single sensor, or a combination of both, are consistent with available geological information, indicating that the proposed method is effective in geophysical exploreation.(2) The two-dimensional dynamic response analysis can simulate reasonably well the observed spatial variation of ground motions, indicating that the proposed method is also effective in site response evaluation.(3) The spatial variation of ground motions and building damage during recent earthquakes are strongly affected by the effects of surface geology and can readily be estimated by the proposed method. Less

这项研究的目的是基于使用一系列传感器或单个传感器或两者的组合，基于微生物测量值来开发一种估计剪切波速度结构以及地面运动以及涉及不规则分层沉积物的区域的危害。为此，（l）数据采集系统是为了提取微生物中提取表面波特征（即分散数据和H/V光谱）的开发；（2）开发了分析方法，以根据微生物分散数据或H/V光谱的反转来估计一个和二维剪切波速度曲线，或两者兼有；（3）在几个ARIAS上进行了微培养的测量，其中已知剪切波速度并检查了提出方法的有效性；（4）在其中一个区域中也进行了强运动阵列观察，以表征跨不规则分层沉积物的地面运动的空间变化；（5）进行二维动态…进行了更多响应分析，以评估该地区的地面运动特征并与观察到的记录进行比较；（6）基于提议的方法和分析，在最近强烈地震期间在建筑物损害的区域进行了地面地质对建筑物损害的影响。（2）二维动态响应分析可以很好地模拟观察到的地面运动的空间变化，表明所提出的方法在现场响应评估中也有效。（3）地面运动的空间变化和最近地震期间的空间损害受到表面地球和表面地球的影响的强烈影响。较少的