| Project/Area Number |
06558061
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Natural disaster science
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| Research Institution | YATSUSHIRO COLLEGE OF TECHNOLOGY |
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Principal Investigator |
FUCHIDA Kunihiko Yatsushiro College of Technology, Department of Civil & Architectural Engineering, Associate Professor, 土木建築工学科, 助教授 (80124155)
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| Co-Investigator(Kenkyū-buntansha) |
AKIYOSHI Takashi Kumamoto University, Department of Civil & Environmental Engineering, Professor, 工学部, 教授 (60040383)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1995: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | COMMON UTILITY CONDUIT / BURIED PIPELINE / SEISMIC RESPONSE / MODEL TEST / LIQUEFACTION / NON-LINEAR / LATERAL FLOW |
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| Research Abstract |
Objects of this study are to clarify the non-linearly behavior characteristics of common utility conduit subjected to seismic ground motions or large ground deformations and to evaluate the important parameters such as soil spring or joint spring for the effective aseismic design model for the conduit. Particularly we focussed on the large ground deformations induced by soil liquefaction during strong groundmotion and performmed laboratory test for the soil springs and build up the analytical method for seismic response of conduit including its joints. Liquefaction tests using the the model pipeline as the conduit model in sand box on shaking table are performed. From the results of shear strains, pore pressures and accelerations the non-linearly characteristics of restorning forces of conduit-ground system during soil liquefaction are investigated. Experiment for the lateral flow induced by soil liquefaction is also performed.
Numerical analysis programs for soil liquefaction and lateral flow induced by it are deveroped based on 2 dimensional FEM.Accuracy of these methods is confirmed by comparing the analytical results with the experimental or measured results. Behavior of conduit in soil liquefaction environment is analyzed, which is based on a beam on an elastic foundation. Using modified transfer matrix method as analytical tool, numerical computations are performed for displacements and internal forces of conduit and joints, and important parameters for aseismic design of conduit are evaluated.
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