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

• 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
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555158/
• 关键词: Microtremors; H; V Ratio; Shear wave velocity profile; Earthquake; Array observation; Rayleigh waves; Dispersion curve; Dynamic response characteristics

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

本研究的目的是开发一种方法，用于估计剪切波速度结构，以及地面运动和由此产生的危害，在该地区涉及不规则分层存款，根据微动测量使用传感器阵列或单个传感器，或两者的组合。为此，（1）开发了用于提取面波特征（即，（2）建立了一种基于地脉动频散数据和H/V谱反演的一维和二维剪切波速度剖面的分析方法，（3）在已知剪切波速度的几个阿里亚斯观测点进行了地脉动观测，检验了所提方法的有效性;（4）在其中一个地区进行了强震动台阵观测，以描述不规则层状沉积物地面运动的空间变化; ...更多信息 进行了反应分析，评价了该地区的地震动特性，并与实测记录进行了比较;（6）在近几次强震建筑物破坏区考察了地表地质对建筑物破坏的影响，结果表明：（1）一阶和二阶非线性系统的最优解是一阶和二阶非线性系统的最优解;通过使用传感器阵列或单个传感器或两者的组合的微动测量确定的三维剪切波速度，与可用的地质信息一致，表明该方法在地球物理勘探中是有效的。(2)二维动力反应分析可以较好地模拟实测地震动的空间变化，表明所提出的方法在场地反应评估中也是有效的。(3)地震动的空间变化和建筑物的损坏在最近的地震强烈影响的地表地质的影响，可以很容易地估计所提出的方法。少

项目成果

中島俊介: "微動および地震動のアレイ観測に基づく不整形地盤の地震動特性評価"第37回地盤工学研究発表会. 2099-2100 (2002)

中岛俊介：“基于微震和地震运动阵列观测的不规则地面地震运动特征评估”第37届岩土工程研究会议2099-2100（2002）。

関口徹: "微動観測から推定した台湾集集地震強震観測点の表層地震増幅特性"第36回地盤工学研究発表会. (発表予定). (2001)

关口彻：“根据微震观测估计的台湾集集地震强震观测点的地表地震放大特征”，第 36 届岩土工程研究会议（预定报告）（2001 年）。

Kohji Tokimatsu: "Shallow Vs Profiles and Site Effects Estimated From Microtremor Measurements at Selected Strong Motion Stations in Taiwan"International Workshop on Annual Commemoration of Chi-Chi Earthquake. 3. 263-272 (2000)

Kohji Tokimatsu：“根据台湾选定强震站的微震测量估算浅层剖面和场地效应”集集地震年度纪念国际研讨会。

Kohji Tokimatsu: "Evaluation of Site Effects on Building Damage in The 1999 Chi-Chi Earthquake Based on Microtremor Measurements"Proceedings of The Fourth Forum on Implications of Recent Earthquakes on Seismic Risk. 73-83 (2002)

Kohji Tokimatsu：“基于微震测量的 1999 年 Chi-Chi 地震中建筑物损坏的现场影响评估”第四届近期地震对地震风险影响论坛的会议记录。

K.Tokimatsu: "Site Effects Estimated From Microtremor Measurements at Selected Strong Motion Stations in Taiwan"4th International Conf.On Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. No.3・31(CD-ROM). (2001)

K.Tokimatsu：“根据台湾选定的强震站的微震测量估算场地效应”第四届岩土地震工程和土壤动力学最新进展国际会议第 3・31 期（CD-ROM）。