2015 Fiscal Year Research-status Report
衝突と滑りを考慮した斜張橋の地震応答予測モデルの開発とその直下地震への適用
| Project/Area Number |
15K18104
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| Research Institution | Yokohama National University |
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Principal Investigator |
シリンゴリンゴ ディオン 横浜国立大学, その他の研究科, 准教授 (60649507)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 斜張橋の地震応答 / 斜張橋のパウンディング / 衝突のモデル化 / 三次元吊形式橋梁モデル |
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| Outline of Annual Research Achievements |
The research title is development and verification of a three-dimensional prediction model of the ultimate seismic performance of link-bearing connection in cable-stayed bridges in consideration of the collision and slip. The main objectives of the research are:
1)to observe the pattern regarding vibration response of the bridge during different scale of earthquake from the past earthquake on Yokohama-Bay Bridge (earthquake data from year 1990-2011)
2)to determine the behavior of link-bearing connection in longitudinal direction.
3)to determine the pounding behavior between tower and girder in lateral direction.
4)to develop a three-dimensional finite element model of the bridge to describe behavior of link connection in longitudinal and lateral direction during large earthquake (Level 2 earthquake).
The research consists of two parts, the first part (first year) of the research deals point2 1,2, and 3 above, while the second year deals with point no.4 with data analysis.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
From four main objectives of the research, analysis regarding the objective no.1 has been carried out and submitted to publication (reference no.1). The pounding behavior on lateral direction between tower and girder was established. A numerical model considering the pounding has been proposed and verified in the related work (reference no.2). This model accounts for simplified spring analysis, and it has some limitation. Right now, a new model that considered contact problem with damping effect is being developed and analyzed. Regarding the longitudinal direction, a non-linear model of link-bearing connection with inverse pendulum analogy is now being carried out and the result is expected.
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| Strategy for Future Research Activity |
Plan for the next year:
1.Finalizing the modeling for longitudinal behavior of link-bearing connection and submitting paper on the subject.
2.Incorporating the model of lateral and longitudinal behavior of link-bearing in three-dimensional bridge model.
3.Test the model for Level 2 of earthquake.
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| Causes of Carryover |
To complete the tasks mentioned above we need to purchase a computer workstation and a multipurpose finite element software. Expenses on the second year will be on the two items. In addition, other expenses are to attend national conference, international conferences and several earthquake surveys
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| Expenditure Plan for Carryover Budget |
1)Purchase a computer workstation and a multipurpose finite element software.
2)Attend national conference, international conferences and several earthquake surveys
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