2013 Fiscal Year Final Research Report
A Method of Seismic 3-Dimensional Nonlinear Response Evaluation for the Important Soil Foundation Infrastructures Subjected to Large Vertical Motion including Permanent Ground Displacement near Faults
| Project/Area Number |
23560574
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | University of Miyazaki |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | 震源断層近傍 / 大きな地震動上下成分 / 断層永久変位 / 3次元非線形地震応答解析 / 多地点入力地震動 / 耐震補強 / 重要生産・社会基盤構造物 / 3次元地震動 |
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| Research Abstract |
To establish a method of seismic 3-dimensional nonlinear response evaluation for the important infrastructures subjected to large vertical motion with permanent displacement near fault, (1) a method of the stress strain based response analysis of soil foundation structure system is developed. Also, (2) a theoretical method of simulating near fault ground motion is proposed.
The study shows that the most effective device of the response reduction of bridges near faults is the viscous damper although the hysteresis type devices are currently used, because the pulse type motion with large ground displacement near fault cannot generate hysteresis loop of device. The study also reveals that the vertical free support of the bridge girder is effective to reduce the stresses in bridges due to large vertical motion near fault. Finally the study shows that the replacement from the RC bridge slabs to the aluminum slabs is effective to reduce response of the bridges near fault.
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