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Engineering Properties of Long-Period Earthquake Motion

长周期地震运动的工程特性

基本信息

批准号：
63302043
负责人：
YAMADA Yoshikazu
金额：
$ 3.58万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63302043/
关键词：
Long-Period Earthquake Motion Observation of Earthquakes Estimation of Ground Motion Response Spectra Design Spectra of Long-Span Bridges Sloshing Analysis Empirical Green's Function Correction of Seismogram 強震計記録補正設計スペクトルリスク評価強震計

项目摘要

The acceleration response spectra of 1983 Nihon-kai Chubu earth-quake and those of 1985 Mexico earthquake were found larger than the design spectra of high-rise buildings and of long span bridges. The object of this research is to suggest the suitable design spectra for the long span bridges considering the following problems. 1) Estimation of the long period ground motion and the response spectra of Nihon-kai Chubu earthquake and other large earthquakes from the JMA strong motion records, SMAC accelerogram and the sloshing records of the huge tanks. 2) Error estimation of the seismic records of SMAC or SAMTAC accelerogram in long period from the vibration testings. 3) Estimation of the long period ground motion at Akashi using semi-empirical method and of the response spectra of that huge earthquake.The results of this research are summarized as follows: 1) The seismograph was set near the abutment of Akashi Kaikyo Ohashi (Honshu Shikoku Bridge) to observe the long-period ground motions. 3 earthquakes were recorded until now and the long-period velocity record of 11/2/1989 Iwate-ken Oki earthquake was successfully observed. 2) One of our investigators proposed the semi-empirical method to estimate the large earthquake ground motion. This method was applied to estimate the huge ground motion near Akashi, and the response spectra were calculated to compare with the design spectra of Akashi Kaikyo Ohashi. The ground motion of Nihon-kai Chubu earthquake was also simulated using this method. 3) The sloshing of the large tanks at Niigata was studied to estimate the long-period response spectra of Nihon-kai Chubu earthquake. 4) The correction of the digital accelerograms in long-period domain and the saturated JMA records were investigated to calculate more accurate response spectra.

1983年日本中部地震和1985年墨西哥地震的加速度反应谱被发现大于高层建筑和大跨度桥梁的设计谱。本研究的目的是考虑以下问题，为大跨度桥梁提出合适的设计范围。 1）根据JMA强震记录、SMAC加速度图和巨型储罐的晃动记录，估算日本中部地震和其他大地震的长周期地震动和反应谱。 2）通过振动测试对SMAC或SAMTAC加速度图的长周期地震记录进行误差估计。 3）采用半经验法估算明石长周期地震动，并估算该次大地震的反应谱。本研究结果总结如下： 1）将地震仪设置在明石海峡大桥（本州四国大桥）桥台附近，观测长周期地震动。迄今为止已记录了3次地震，并成功观测到了1989年11月2日岩手县隐木地震的长周期速度记录。 2）我们的一位研究人员提出了半经验方法来估计大地震地震动。应用该方法对明石附近的巨大地震动进行了估算，并计算了响应谱，并与明石海峡大桥的设计谱进行了比较。日本海中部地震的地面运动也用该方法进行了模拟。 3）研究了新泻大型储罐的晃动，以估计日本中部地震的长周期反应谱。 4）研究了长周期域数字加速度图和饱和JMA记录的校正，以计算更准确的响应谱。