New Index for Earthquake Damage in Considering Response Spectra and Number of Cycle

考虑响应谱和周期数的地震损失新指标

基本信息

批准号：
07650539
负责人：
KITAURA Masaru
金额：
$ 0.96万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650539/
关键词：
Response Spectrum Number of Cycle Earthquake Damage Index Strong Ground Motion Record 震害新指標地盤震害振動震害

项目摘要

This study deals with a new index for earthquake damage in considering response spectra and number of cycle of response. The maximum acceleration has been used as a typical index for earthquake damage so far. Although great acceleration more than 1,000gal was recorded in the 1993 Kushiro-oki earthquake in Japan and 1994 Northridge earthquake in USA,little structural damage occurred. Not only the maximum acceleration or maximum response acceleration but also the number of cycle of great response acceleration should be considered for explanation of structural damage.Fatigue response spectrum is proposed in this study. This spectrum is combined with response spectrum and number of cycle, that is, x axis is natural period of structure, y axis is number of cycle in each response level and z axis is response level. Fatigue response acceleration spectrum, fatigue response velocity spectrum and fatigue response displacement spectrum can be evaluated from response acceleration spectrum, response velocity spectrum and response displacement spectrum, respectively. Based on fatigue response spectrum, FSI value (Fatigue Spectral Intensity) was estimated. This value is defined as a volume of fatigue response spectrum.The correlation between FSI value and earthquake damage is investigated using data of the 1993 Kushiro-oki earthquake, 1993 Notohanto-oki earthquake, 1994 Hokkaido Toho-oki earthquake, 1994 Sanriku Haruka-oki earthquake and 1995 Hyogoken-Nambu earthquake. This study is focusing on the damage to wooden houses and water supply pipelines.

这项研究介绍了在考虑反应光谱和响应周期数时进行地震破坏的新指数。到目前为止，最大加速度已用作地震损害的典型指数。尽管在1993年日本的Kushiro-oki地震和1994年在美国的北山地震中记录了超过1,000 gal，但几乎没有发生结构性破坏。本研究提出，不仅应考虑最大加速度或最大响应加速度，而且还应考虑响应加速度的循环数量来解释结构损伤。在本研究中提出了FATIGUE响应频谱。该频谱与响应频谱和循环数相结合，即x轴是自然的结构周期，y轴是每个响应水平的循环数，而z轴为响应水平。疲劳响应加速度频谱，疲劳响应速度光谱和疲劳响应位移光谱可以分别从响应加速度频谱，响应速度光谱和响应位移频谱中评估。根据疲劳响应光谱，估计了FSI值（疲劳光谱强度）。该值被定义为疲劳反应谱的数量。使用1993 Kushiro-Oki地震的数据研究了FSI值与地震破坏之间的相关性，1993年Nohanto-Oki地震，1994年Hokkaido Toho-Oki地震，Toho-Oki地震，1994年，1994年Sanriku Haruka-oki-oki Earterquake和1995年1995年1995年3月195年。这项研究的重点是对木制房屋和供水管道的损害。