2003 Fiscal Year Final Research Report Summary
Prediction and Evaluation of Long Extended Infrastructures Near a Fault
| Project/Area Number |
13650527
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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 |
構造工学・地震工学
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| Research Institution | University of Miyazaki |
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Principal Investigator |
HARADA Takanori MIYAZAKI UNVERSITY, FACULTY OF ENGINEERING, Professor, 工学部, 教授 (70136802)
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| Co-Investigator(Kenkyū-buntansha) |
村上 啓介 宮崎大学, 工学部, 助教授 (60219889)
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| Project Period (FY) |
2001 – 2003
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| Keywords | Fault / Seismic Ground Motion / Seismic Waves / Bridge / Pipeline / Tsunami |
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| Research Abstract |
A general stiffness matrix method of simulation of earthquake ground motions has been developed for a kinematic model of fault rupture in laterally homogeneous layered media. Using the simulated ground motions with the permanent ground movements near a fault, The effects of the sedimentary layer and the depth of the upper edge of the fault upon the ground motions, and also upon the nature of inelastic response of the viaduct and the pipeline have been examined. It is found that the seismic wave motions near a fault are quite complex, and the spatial and temporal variation looks like the vortexes appearing behind an obstacle in the air or water flow, and also found that the thickness of the sedimentary layer strongly affects on the response behaviors of the viaduct and buried pipeline near a fault.
By improving the simulation code of tsunami, the tsunamis of the 1854 Nankai earthquake and the 1968 Hyuganada earthquake have been simulated and their accuracy has been examined by comparing with the observed data. Also the tsunami wave forces acting on the offshore structures have been simulated. It is found that the tsunami wave forces on the structure are estimated to be about 10% of the earthquake loadings. This finding is tentative and the examinations by changing the conditions will be necessary.
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Research Products
(20 results)
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[Publications] Harada, T., Oho, K., Nonaka, T., Yamashita, N.: "Analysis of seismic response behaviors of viaduct crossing a strike slip fault rupture,"Journal of Earthquake Engineering, JSCE, Paper No. 71. Vol.27 (CD-ROM). (2003)
Description
「研究成果報告書概要(欧文)」より
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[Publications] Harada, T., Okada, Y., Oho, K., Kobayashi, M.: "A subsystems method in simulation of earthquake ground motions using a direct 3-D boundary element method"Proc. of the 13th World Conference on Earthquake Engineering, Vancourver, Canada, August 1-6, Paper No. 8. (CD-ROM). (2004)
Description
「研究成果報告書概要(欧文)」より
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