1996 Fiscal Year Final Research Report Summary
Development of Computer Simulator for Rigid Blocks under Earthquake Excitations
| Project/Area Number |
06558053
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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 | 試験 |
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| Research Field |
Natural disaster science
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| Research Institution | University of Tokyo |
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Principal Investigator |
YAMAZAKI Fumio University of Tokyo, Institute of Industrial Science, Associate Professor, 生産技術研究所, 助教授 (50220322)
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| Co-Investigator(Kenkyū-buntansha) |
MEGURO Kimiro University of Tokyo, Institute of Industrial Science, Associate Professor, 生産技術研究所, 助教授 (40222343)
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| Project Period (FY) |
1994 – 1996
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| Keywords | Earthquake / Interior Object / Overturning / Distinct Element Method / Simulation / Shaking Table Test |
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| Research Abstract |
Shaking table tests were conducted to investigate the response of rectangular wooden blocks and block assemblies of various sizes and slenderness to harmonic and earthquake base excitation. The shaking table tests were followed by analytical and numerical studies in order to estabish criteria for the initiation of rocking and overturning of rigid blocks. The Distinct Element Method (DEM) was employed as a tool of numerical simulation. From the comparison study with the results of the experiments and analytical solutions, DEM was found to have good accuracy for this problem.
The DEM was further utilized to establish overturning criteria of rigid blocks. For a set natural earthquake, motions, numerical studies were conducted and a relationship of overturning was proposed as a function of size, slenderness ratio, peak input acceleration and peak input velocity.
This relationship may be conveniently used in seismic risk estimation of interior objects subjected to strong earthquake motion.
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