| Project/Area Number |
11650604
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | Toyota National College of Technology |
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Principal Investigator |
IMAOKA Katsuya Architecture Toyota National College of Technology Assosiate Professor, 建築学科, 助教授 (20193667)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2000: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥2,400,000 (Direct Cost: ¥2,400,000)
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| Keywords | 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 |
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| Research Abstract |
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.
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