2010 Fiscal Year Final Research Report
Seismic Structural Analysis Method for Large-scale Structure
| Project/Area Number |
20760300
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
ICHIMURA Tsuyoshi Tokyo Institute of Technology, 地震研究所, 准教授 (20333833)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 構造物の地震時挙動 / 階層型解析 / 有限要素法 / 断層-構造物系 |
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| Research Abstract |
Seismic structural response is affected by temporal and spatial variation of strong ground motion, which is caused by fault-structure system: fault mechanism, wave propagation through the crust, the amplification near the ground surface and the soil-structure interaction. In order to estimate such seismic structural response with high resolution and high accuracy, we propose a new analysis method based on multi-scale analyses and numerically verify its validity using small problem. Since the computation cost of construction of 3-D numerical model for large-scale problem including structure and solving the disritizaed governing equation is extremely huge, we cannot conduct numerical simulation based on fault-structure system with actual setting. Thus, we also develop a new method to resolve these difficlties. The accuracy of our method is verified by the comparison with Green's function solution, and seismic response of large-scale complex structure in given earthquake scenario is estimated based on fault-structure system to present its potential usefulness.
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