2016 Fiscal Year Final Research Report
Collapse mode of flange vertical buckling of an I-sectioned steel girder
| Project/Area Number |
26420457
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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 | Shinshu University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 垂直座屈 / 鋼I桁 |
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| Outline of Final Research Achievements |
Flange vertical buckling is studied numerically on an I-shaped steel girder having its dimension of a practical bridge girder. As the result, in addition to the buckling mode observed in the experimental test, the displacement pattern for the higher mode is obtained. The analysis with the condition in which the torsional deformation of the top flange is restricted, flange vertical buckling arises in the model which show the flange torsional buckling. This means that the deck plate can no longer restrict the flange buckling in the vertical buckling problem.
The flange vertical buckling problem is modelized as a bar element under compression on the elastic foundation proposed by Timoshenko. In the Timoshenko’s model, the spring constant is required. The results of this study indicates that the spring constant varies almost linearly for the flange thickness, and the web plate has very small contribution on the spring constant.
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| Free Research Field |
橋梁工学
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