NONAKA Tetsuya

写真a

Affiliation Department etc.

Department of Architecture, Civil Engineering and Industrial Management Engineering
Department of Architecture, Civil Engineering and Industrial Management Engineering

Title

Professor

 

Papers

  • ISSUES AND COUNTERMEASURES FOR SEISMIC DESIGN FOR SUPERSTRUCTURE OF STEEL I GIRDER BRIDGE

    Ryoji TOKUHASHI,Shuta MIYATA,Kazuya MAGOSHI,Tetsuya NONAKA

    STEEL CONSTRUCTION ENGINEERING ( JAPANESE SOCIETY OF STEEL CONSTRUCTION )  ( 108 )   2020.12  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    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.

  • Modeling considering post-peak of secondary member of steel bridge subjected to repeated load and its application to steel arch bridge

      Vol.65A   214 - 224   2019.03  [Refereed]

    Research paper (research society, symposium materials, etc.)   Multiple Authorship

    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

  • Modeling considering post-peak of secondary member of steel bridge subjected to repeated load and its application to steel arch bridge

    2019.04  -  2019.04