Interpretation of Sesmic Intensity Distribution into the building during the Aichiken-Tobu Earthquake through Microtremor Measurement

通过微震测量解释爱知县东武地震期间建筑物内的地震强度分布

• 批准号: 11650604
• 负责人: IMAOKA Katsuya
• 金额: $ 2.05万
• 依托单位: Toyota National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650604/
• 关键词: Aichiken-Tobu Earthquake; Microtremor; Surface Ground; buiding; H; V Spectra; Wakayamaken-Chubu Earthquake; Predominant Period; Niijima Earthquake; Vスペクトル; 微動計測; 増幅倍率

By questionnaire survey method seismic intensitiy distribution into RC buildings was investigated during the Aichiken-Tobu Earthquake (M5.8). The array microtremor measurements on both ground surface and structure have been carried out to 16 buildings where the seismic intensitiy was comparatively large.1. The predominant period of H/V spectrum of microtremor is compared with that of the seismic wave during the Niijima Earthquake (M5.9) and Wakayamaken-Chubu Earthquake (M5.5). The predominant period whose magnification of H/V spectrum is over 5 will be good agreement with that of seismic wave.2. From the separation of predominant period of microtremor into soil effect or building effect, both natural vibration period of the building (Tb) and that of surface ground (Tg) can be estimated exactly. There are three cases in vibration mode of building and surface ground : (1) Tb>Tg, (2) Tb≒Tg, and (3) Tb<Tg. After estimating the seismic response of the structure including the local soil effects, the buildings of Tb≒Tg are the largest of the three.

采用问卷调查的方法，对爱知县东武5.8级地震中钢筋混凝土建筑物的地震烈度分布进行了调查。对16座地震烈度较大的建筑物进行了地表和结构的阵列微动测量.本文还将脉动的H/V谱的卓越周期与新岛地震（5.9级）和和歌山县中部地震（5.5级）的地震波的卓越周期进行了比较。H/V谱放大倍数大于5倍的卓越周期与地震波的卓越周期吻合较好.将地脉动的卓越周期分解为土壤效应和建筑物效应，可以准确地估计建筑物的自振周期（Tb）和地表的自振周期（Tg）。建筑物和地面的振型有三种情况：（1）Tb>Tg，（2）Tb <Tg，（3）Tb<Tg。在估算了包括局部土壤效应在内的结构地震响应后，Tb和Tg的建筑物是三个建筑物中最大的。

项目成果

K.IMAOKA, H.SAKURAI: "Interpretation of Sesmic Intensity Distribution through Horizontal - to - Vertical Spectral Ratio of Microtremors and Source Effects Based on the 1997 Aichiken-Tobu Earthquake (M5.8)"Journal of Structural and Construction Engineering

K.IMAOKA、H.SAKURAI：“基于 1997 年爱知县东武地震 (M5.8) 的微震水平与垂直谱比和震源效应对地震强度分布的解释”结构与建筑工程学报

今岡克也: "微動特性に基づく静岡県内の地盤震動特性に関する研究"豊田工業高等専門学校紀要. 第33号. 113-126 (2000)

今冈克也：“基于微动特性的静冈县地面振动特性研究”丰田国立技术大学公报第33. 113-126号（2000年）。