| Project/Area Number |
60550322
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
土木構造
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| Research Institution | Kyoto University |
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Principal Investigator |
KAMEDA Hiroyuki Professor, DPRI, Kyoto University, 工学部, 助教授 (80025949)
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| Co-Investigator(Kenkyū-buntansha) |
IEMURA Hirokazu Associate Professor, School of Civil Engineering, Kyoto University, 工学部, 助教授 (10026362)
SUGITO Masata Instructor, School of Civil Engineering, Kyoto University, 工学部, 助手 (60115863)
GOTO Hisao Professor, School of Civil Engineering, Kyoto University, 工学部, 教授 (00025793)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1986: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1985: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | seismic design / seismic load / load combination / bridge design / 動的解析 |
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| Research Abstract |
Dynamic seismic analysis of bridge-vehicle system was performed, from which the dynamic effects of vehicle loading on seismic load of highway bridges were studied. Major conclusions derived from this study are as follows.
(1) Dynamic models of a bridge-vehicle system has been developed. On the basis of eigen-analysis and frequency-response analysis, the existence of "resonance modes" and "dynamic reduction modes" has been made clear. The former are cases where the vehicle loading tend to increase the seismic load of bridges, and the latter, vise-versa.
(2) From the time history analysis of seismic response of bridge-vehicle system, details of the physical process have been clarified regarding the development of the resonance modes or the vibration reduction modes.
(3) Maximum values of major response quantities (displacement, angle of rotation, bending moment, and shearing force) have been obtained, and their characteristics were discussed with emphasis on the effects of vehicle loading relative to the seismic response of bridge alone.
(4) Amplification/reduction effects of vehicle loading on seismic loads of highway bridges have been discussed quantitatively, and simple physical parameters have been proposed as descriptors of these effects.
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