OBATA Makoto

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

Mail Address

E-mail address

Graduating School

  • 1978.04
    -
    1982.03

    The University of Tokyo   Faculty of Engineering   Graduated

Graduate School

  •  
    -
    1985.03

    Northwestern University    Doctor's Course  Completed

  •  
    -
    1984.03

    Northwestern University    Master's Course  Completed

  •  
    -
    1982.03

    The University of Tokyo  Graduate School, Division of Engineering  Master's Course  Unfinished Course

Degree

  • Northwestern University -  Master of Science

External Career

  • 1985.04
    -
    1987.03

    San Diego, California University   Researcher  

Field of expertise (Grants-in-aid for Scientific Research classification)

  • Structural engineering/Earthquake engineering/Maintenance management engineering

 

Research Career

  • Simulation of corrosive environment of steel bridges

    Collaboration in Japan   (not selected)  

    Project Year:  2008.04  -  Now

Papers

  • Observation of suspended sea salt particles and its numerical simulation as estimation of corrosive environment

    Makoto Obata, Taro Murakami

      60 ( A ) 596 - 604   2014.04  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Global-local approach to numerical simulation of adhesion of seasalt particles on bridge girders

    Makoto Obata,Li Guotai, Yasunari Watanabe, Yoshiaki Goto

    Journal of Structural Engineering A   58   668 - 678   2012.03  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Numerical analysis of fracture phenomena observed in a locally buckled circular steel column

    Hideyuki Fujiwara, Makoto Obata, Yoshiaki Goto

    Journal of Structural Engineering A   58   310 - 318   2012.03  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Analysis of rubber bearings with mullins effect uner cyclic loading

    Makoto Obata, Chisa Koiwa, Yoshiaki Goto

      1 ( 1 ) 335 - 338   2017.07  [Refereed]

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

  • Ultimate Behavior of Steel and CFT Piers in Two-Span Continuous Elevated-Girder Bridge Models Tested by Shake-Table Excitations

    Yoshiaki Goto, Takemasa Ebisawa, Makoto Obata, Jianzhong Li, Yan Xu

    Journal of Bridge Engineering ( American Society of Civil Engineering )    2017.01  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Effects of land use data on numerical simulation of corrosive environment caused by airborne sea salt particles

    Makoto Obata, Masato Fukushima, Seiya Suzuki

    Proc. the 7th ISSS   1 ( 1 ) 228 - 229   2013.11  [Refereed]

    Research paper (international conference proceedings)   Multiple Authorship

    Corrosion of steel bridges in a coastal area is mainly caused by sea salt particles coming from ocean. Appropriate estimation of such airborne sea salt particles is critically important for a proper anticorrosion management program. At present, the most reasonable simulation of sea salt concentration can be performed as a part of meso scale meteorological analysis. However, accuracy of such simulation is not verified well so far. The objective of this work is to verify and to improve the accuracy of numerical simulation of airborne sea salt particles by introducing enhanced land use data. Other factors affecting accuracy of airborne sea salt concentration will also be discussed.

  • Numerical simulation of adhesion of sea-salt particles

    Makoto Obata, Li Guotai, Yasunari Watanabe, Yoshiaki Goto

    Structure and Infrastructure Engineering   52   398 - 408   2013.01  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    It is important to estimate corrosion environment of steel bridges for a proper corrosion prevention and maintenance
    program. The governing factors of corrosion are temperature, humidity and various dusts on the surfaces. Among them, the
    adhered sea-salt particulate matter (SSPM) is most important and therefore airborne SSPM near a bridge site must be
    considered in its design. To prevent degradation of protective paint, removal of adhered SSPM by wash out has been tried in
    some bridges. To this end, it is better to know the adhesion behaviour of SSPM to bridge girders. The objective of this
    manuscript is to pursue numerical method to simulate the adhesion behaviour of salt particles oriented from sea surface.
    Specifically, two scale approach is proposed. Mesoscale meteorological analysis and Lagrangian type two phase flow
    analysis are used in global and local analyses respectively. The comparisons between the numerical and observed results
    showed that the numerical analysis can reproduce essential behaviours of airborne SSPM.

  • Numerical Estimation of Corrosion Environment by Airborne Sea Salt Particles

    Liu Chen Chen, Makoto Obata

    Advanced Materials Research   599   220 - 223   2012.11  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    Anticorrosion of steel bridges has been an increasingly important problem in Japan. For a proper anticorrosion
    and maintenance program, it is important to estimate corrosion environment of steel bridges. In Japan, airborne
    sea salt generated from ocean is a predominant factor. Authors have been working on establishing a consistent
    framework to estimate corrosion environment numerically. It consists of a local and a global approach. While
    adhesion of airborne sea salt particles to bridge structures are simulated locally by a CFD analysis, the large
    scale analysis yields a boundary conditions of the local analysis and is given by a part of a mesoscale
    meteorological analysis. The objective of this work is to numerically investigate reliability of such large scale
    analysis in estimation of corrosion environment caused by airborne sea salt particles.

  • Numerical Prediction of Ductile Crack Initiation in a Steel Column under Cyclic Loading

    Makoto Obata, Hideyuki Fujiwara, Yoshiaki Goto

    Proc. of the 10th international conference on advances in steel concrete composite and   1 ( 1 ) 207 - 214   2012.07  [Refereed]

    Research paper (international conference proceedings)   Multiple Authorship

  • Error effect analysis in shape measurement of bridge pier model by laser transducer

    XianFeng Wang, Feng Xing, Makoto Obata, Yoshiaki Goto

    Proc. of 2nd international symposium on service life design for infrastructure   2   1027 - 1034   2010.10  [Refereed]

    Research paper (international conference proceedings)   Multiple Authorship

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Presentations

  • Effects of Land Use Data on Numerical Simulation of Corrosive caused by airborne seasalt particles

    Masato Fukushima, Seiya Suzuki

    ISSS2013  (Jeju, Korea)  2013.11  -  2013.11  KAIST

  • Numerical prediction of ductile crack initiation in a steel column under cyclic loading

    Makoto Obata, Hideyuki Fujiwara, Yoshiaki Goto

    ASCCS  (Singapore)  2012.07  -  2012.07  Singapore Structural Steel Society

  • Numerical estimation of corrosion environment by airborne sea salt particles

    Liu Chenchen, Makoto Obata

    GCCSEE  (Yichang)  2012.10  -  2012.10  Geoenviornmental Engineering Branch, Chinese Society for Rock Mechanics and Engineering

  • 高解度地表面情報導入による飛来塩分量予測の改良

    村上 太郎,福島 雅人,鈴木 誠也,小畑 誠

    土木学会全国大会  (千葉県)  2013.09  -  2013.09  土木学会

  • 連続高架橋模型の2方向加振実験に基づくゴム支承の挙動特性に関する検討

    奥村徹,後藤芳顯,海老澤健正,小畑 誠

    土木学会全国大会  (岡山大学)  2015.09  -  2015.09  土木学会

  • 名古屋市における浮遊塩分濃度の観測と数値解析による検討

    鈴木誠也,村上太郎,小畑誠

    土木学会全国大会  (大阪大学豊中キャンパス)  2014.09  -  2014.09  土木学会

  • 名古屋市における浮遊塩分濃度の観測と数値解析による検討

    鈴木誠也,村上太郎,小畑誠

    土木学会全国大会  (大阪大学豊中キャンパス)  2014.09  -  2014.09  土木学会

  • Numerical simulation of adhesion of sea salt particles for anticorrosion of steel bridges

    Makoto Obata, Shunya Yokoi, Li Guotai, Yoshiaki Goto

    ASEM11  (Seoul)  2011.09  -  2011.09  IASEM

  • Numerical analysis of sea-salt particulate matter adhesion on bridge surfaces

    ICASS09  2009.04  -  2009.04 

  • Effects of stiffeners on stability and ductility of stiffened thin-walled steel columns with rectangular cross section under bi-directional loading

    CIMS2008  2008.04  -  2008.04 

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