NAKAO Masato

Affiliation

Faculty of Urban Innovation, Division of Urban Innovation

Job Title

Research Fellow

Date of Birth

1974

Research Fields, Keywords

Timber Structure

Mail Address

E-mail address



ORCID  https://orcid.org/0000-0003-1936-5846

Graduating School 【 display / non-display

  •  
    -
    1997

    University of Tsukuba   Faculty of Engineering Science   Graduated

Graduate School 【 display / non-display

  •  
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    1999

    University of Tsukuba  Graduate School, Division of Engineering  Master Course  Completed

Degree 【 display / non-display

  • Doctor of Engineering -  Yokohama National University

  • Master of Engineering -  University of Tsukuba

Campus Career 【 display / non-display

  • 2011.04
    -
    Now

    Duty   Yokohama National UniversityFaculty of Urban Innovation   Division of Urban Innovation   Research Fellow  

  • 2007.04
    -
    2011.03

    Duty   Yokohama National UniversityFaculty of Engineering   Research Fellow  

  • 2001.04
    -
    2007.03

    Duty   Yokohama National UniversityFaculty of Engineering   Research Associate  

  • 1999.12
    -
    2001.03

    Duty   Yokohama National UniversitySchool of Engineering   Research Associate  

  • 2011.04
    -
    Now

    Concurrently   Yokohama National UniversityCollege of Engineering Science   Department of Architecture,Infrastructure,Ocean Engineering and Ecosystem Science   Research Fellow  

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Academic Society Affiliations 【 display / non-display

  • 1998.12
     
     
     

    Japan Concrete Institute

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    Architectural Institute of Japan

Field of expertise (Grants-in-aid for Scientific Research classification) 【 display / non-display

  • Building structures/Materials

  • Wood science

 

Research Career 【 display / non-display

  • Study on the Evaluation of the Earthquake Resistant Performance of Timber Houses

    Project Year:  -   

  • Evaluation of Structural Performance of Traditional Timber Buildings

    Ordinary Research  

    Project Year:  -   

  • Evaluation of Seismic Performance of Traditional Timber Structure

    Project Year:  -   

  • Evaluation of durability of timber structure

    The Other Research Programs  

    Project Year:  -   

Books 【 display / non-display

  • Evaluation Method and Design of Shear Strength for Multi-story Precast Reinforced Concrete Structural Walls

    (Part: Joint Work )

    Archtectural Institute of Japan  2002

Papers 【 display / non-display

  • A STUDY ON EVALUATION OF RESTORING FORCE CHARACTERISTICS OF TENSILE BRACE SHEAR WALL USING L-SHAPED BRACE CONNECTOR

    MIYAZAKI Taro, NAKAO Masato, FURUTA Tomoki

    Journal of Structural and Construction Engineering (Transactions of AIJ) ( Architectural Institute of Japan )  84 ( 765 )   1421 - 1431   2019.11  [Refereed]

    Joint Work

     View Summary

    <p> A braced shear wall is an important shear resistant element in post and beam construction in Japan. Braced shear walls have better work-ability than nailed plywood shear walls and easier to install ventilation holes and piping holes. Also, it has advantages such as high wall magnification can be obtained by using in combination with plywood, it is widely used in wooden houses.</p><p> Though many studies have been done on the static structural performance of braced shear walls, it was difficult to predict the load- story displacement relationship of the braced shear wall on tensile direction. In this study, focused on the braced shear wall using L-shaped brace connectors that connect the ends of a brace and columns, which have become popular in recent years, static shear loading tests of the single-braced shear wall specimens were conducted. Variables of the specimens were the wall length, the thickness of the L-shaped brace connector, the number and the length of screws.</p><p> Then, an analysis model of the braced shear wall with the L-shaped brace connectors was proposed and static pushover analyses were conducted. The analysis result showed close to the load-displacement relationship of the experiment up to about 1/50 rad.</p><p> From the static shear loading tests and the pushover analyses, following findings were obtained.</p><p> </p><p> a) As the thickness of the L-shaped brace connector increases, the shear strength of the braced shear wall increases and the ultimate displacement decreases.</p><p> b) Effect of the number of the screws on the column on the shear strength of the braced shear wall is small in the case of 910mm of wall length. However, in the case of 1365mm and 1820mm of wall length, since a ratio of the horizontal component of the axial tensile force of the brace to the vertical component of the one increases, it affects the shear strength.</p><p> c) With long screws on the column, the maximum shear strength of the braced shear wall increases. However, there is possibilities of pulling-through the screw from the connector or splitting failure of the column. Therefore, the higher pull-out strength of the long screw may not affect the maximum strength.</p><p> d) Even if the number of screws on the brace side increases, the influence on the shear strength of the braced shear wall is small due to cracks on the end of the brace. If the cracks on the brace do not occur, the maximum shear strength of the braced shear wall is considered to increase.</p>

    DOI CiNii

  • Shear Strength and Deformation Capacity of Mortar Finishing External Wall with Unit Wall Length

    Masato NAKAO, Terusato INOUE, Kazuhiro INAGAKI, Yasunari UMEDA, Toyoshige YAMANAKA, Satoshi KONDOU, … Show more authors

    AIJ Journal of Technology and Design ( Architectural Institute of Japan )  24 ( 56 )   165 - 170   2018.02  [Refereed]

    Joint Work

    DOI CiNii

  • Evaluation of Shear Strength of Lightweight Mortar Finishing External Wall with Opening

    NAKAO Masato,ONO Yasushi,TAHARA Masaru,MIYAMURA Masashi,INOUE Terusato,KOGA Kazuya

    Journal of structural and construction engineering ( Architectural Institute of Japan )  82 ( 733 )   451 - 461   2017.03  [Refereed]

    Joint Work

    DOI CiNii

  • Structural Performance Evaluation of Traditional Wooden Framework With a Jointed Column

    Kota IINUMA, Masato NAKAO

    AIJ Journal of Technology and Design ( Architectural Institute of Japan )  21 ( 48 )   615 - 620   2015.06  [Refereed]

    Joint Work

    DOI CiNii

  • EVALUATION OF SHEAR STRENGTH OF TRADITIONAL WOODEN FRAME WITH HANGING AND WINDOW-BACK WALL

    Masato NAKAO, Masami GOTOU, Yoshiyuki SUZUKI

    AIJ Journal of Technology and Design ( Architectural Institute of Japan )  19 ( 42 )   525 - 530   2013.06  [Refereed]

    Joint Work

    DOI CiNii

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Grant-in-Aid for Scientific Research 【 display / non-display

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2019.04  -  2022.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2015.04  -  2018.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2015.04  -  2018.03 

  • Grant-in-Aid for Young Scientists(B)

    Project Year: 2013.04  -  2015.03 

Preferred joint research theme 【 display / non-display

  • Evaluation of Structural Performance of Timber Buildings