| Project/Area Number |
07555177
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Building structures/materials
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
FUJIWARA Teizo Kyoto University, Disaster Prevention Research Institute, Profeesor, 防災研究所, 教授 (10026031)
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| Co-Investigator(Kenkyū-buntansha) |
INOUE Ryuji General Building Research Corporation, Chief Researcher, 主任研究員
KUSAKABE Kaoru Kobe University, Department of Architecture and Civil Engineering, Professor, 工学部, 教授 (80027250)
OBA Shintaro Osaka Institute of Technology, Department of Architecture, Professor, 工学部, 教授 (50079521)
KITAHARA Akio Kyoto University, Disaster Prevention Research Institute, Assistant, 防災研究所, 助手 (00195273)
SUZUKI Yoshiyuki Kyoto University, Disaster Prevention Research Institute, Associate Profeesor, 防災研究所, 助教授 (50027281)
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| Project Period (FY) |
1995 – 1997
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| Keywords | Strong Motion Measurement / Damage Estimation in Kyoto / Network System / Spectra of Ground Motion / Earthquake Response Analysis / Estimation of Dynamic Characteristics |
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| Research Abstract |
In this research, we developed a new technology of earthquake observation system spreaded in Kyoto area. This network system is composed of 10 observation places, where there are vertical arrays in base ground, surface soil and inside of the building as well as 4 observation places at surface ground by Kyoto prefecture. Those observation systems in different characteristics of soil conditions and different types of building structures are automatically checked, transmitted in real-time and analyzed for those acceleration records by using ISDN line and computer software.
Some of the interesting results were obtained from this network system ; 1) Predominant frequency due to far-field earthquake is small and similar with each site, while that due to near-field earthquake is strongly affected by the dynamic characteristics of surface soil. 2) Some of the responses of the structure are dominant in higher mode when subjected to near-field earthquake. 3) Spectral ratio of surface soil to base ground and top story to surface soil are able to designate dynamic characteristics of surface ground and super structure. 4) Earthquake damage distribution in wide region of Kyoto, may be estimated by using this network system on time. 5) Damping in higher mode of structure must be carefully determined especially for near-field earthquake and fundamental frequency of soil-structure system is a little different in far-field earthquake with in near-field.
Otherwise, some interesting results by the response analyzes subjected to the 1997 Hyogoken-Nanbu earthquake are obtained such as pile-soil interaction, soil-structure interaction, liquefaction analysis, and so on.
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