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Affiliation Department |
Department of Architecture, Civil Engineering and Industrial Management Engineering
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Title |
Professor |
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External Link |
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NONAKA Tetsuya
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Papers
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Construction analysis model of steel bridge by using point cloud data and accuracy verification Reviewed
Vol. 69A 637 - 647 2022.03
Language：Japanese Publishing type：Research paper (scientific journal)
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Constitutive equation for H-shaped cross-section steel under cyclic plastic histeresis and its application Reviewed
Vol. 69A 373 - 385 2022.03
Language：Japanese Publishing type：Research paper (scientific journal)
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ISSUES AND COUNTERMEASURES FOR SEISMIC DESIGN FOR SUPERSTRUCTURE OF STEEL I GIRDER BRIDGE Reviewed
Ryoji TOKUHASHI,Shuta MIYATA,Kazuya MAGOSHI,Tetsuya NONAKA
STEEL CONSTRUCTION ENGINEERING ( 108 ) 2020.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOCIETY OF STEEL CONSTRUCTION
In this study, the differences of the three-dimensional seismic response behaviors of the steel I girder bridges that constructed in many cases were clarified. And, The design issues of the steel I girder bridges under the L2 earthquakes are summarized. Of comparing the result of the design with the result of the entire bridge dynamic analysis, it was confirmed that the L2 seismic responses of the members exceed the allowable design level for the L1 earthquakes. These exceeding responses are considered to be problems for the existing bridges, but, the damages of the bridge members are consistent with the damages of the steel I girder bridges caused by past large-scale earthquakes.
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Modeling considering post-peak of secondary member of steel bridge subjected to repeated load and its application to steel arch bridge Reviewed
Vol.65A 214 - 224 2019.03
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
In the seismic upgrading design of existing steel arch bridges if it is difficult to prevent damages to the secondary members such as braces, bridges are designed allowing damages to the secondary members while ensuring the safety of the structure. In such a case, it is important to accurately predict the behavior in the post-peak regions of the secondary members in the seismic response analysis.In this study, the applicability of an analytical model that can accurately and easily predict the post-peak behavior of the secondary members is discussed. As a result, the post-peak behavior of the secondary members could be accurately predicted by the numerical model investigated, if the effective slenderness ratio of the secondary members is appropriately evaluated.
Presentations
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Modeling considering post-peak of secondary member of steel bridge subjected to repeated load and its application to steel arch bridge
Event date： 2019.04
Language：Japanese Presentation type：Oral presentation (general)
In the seismic upgrading design of existing steel arch bridges if it is difficult to prevent damages to the secondary members such as braces, bridges are designed allowing damages to the secondary members while ensuring the safety of the structure. In such a case, it is important to accurately predict the behavior in the post-peak regions of the secondary members in the seismic response analysis.In this study, the applicability of an analytical model that can accurately and easily predict the post-peak behavior of the secondary members is discussed. As a result, the post-peak behavior of the secondary members could be accurately predicted by the numerical model investigated, if the effective slenderness ratio of the secondary members is appropriately evaluated.