楊 一舟 (ヤン イシュウ)

写真a

所属

理工学術院 理工学術院総合研究所

職名

次席研究員(研究院講師)

メールアドレス

メールアドレス

ホームページ

http://www.f.waseda.jp/y.sato/index.html

兼担 【 表示 / 非表示

  • 理工学術院   創造理工学部

学歴 【 表示 / 非表示

  • 2016年10月
    -
    2019年09月

    名古屋大学   大学院工学研究科   土木工学専攻  

    博士(工学)

学位 【 表示 / 非表示

  • 2019年09月   名古屋大学   博士(工学)

経歴 【 表示 / 非表示

  • 2020年04月
    -
    継続中

    早稲田大学   理工学術院総合研究所

所属学協会 【 表示 / 非表示

  • 2017年
    -
    継続中

    日本コンクリート工学会

  • 2018年
    -
     

    土木学会

 

研究分野 【 表示 / 非表示

  • 構造工学、地震工学

研究キーワード 【 表示 / 非表示

  • 非線形解析

  • コンクリート工学

論文 【 表示 / 非表示

  • Experimental study on bond behavior of corroded rebars coated by anti-corrosive materials in polymer cement mortar

    Mohammad Ridduhan L. Natino, Yizhou Yang, Hikaru Nakamura, Taito Miura

    Construction and Building Materials   300  2021年09月  [査読有り]

     概要を見る

    This study investigates the bond behavior of anti-corrosive coated corroded rebars in a polymer cement mortar (PCM) as a common patching material to repair corrosion-induced damaged reinforced concrete structures. Cementitious and epoxy types of anti-corrosive coating materials are utilized. The corroded rebars are prepared by accelerated corrosion test in laboratory with a 5–10% target corrosion degree. The single effect of the coating materials on the bond behavior is investigated using coated round and deformed rebars. The combined effects of the corrosion and the coating materials are investigated using coated corroded deformed rebars. To thoroughly understand the bond behavior and mechanism, the effects of the corrosion and the coating materials on the change in the geometrical properties and surface roughness of the rebars are quantitatively analyzed by laser scanning tests. Finally, a two-end pull-out test is conducted to measure and investigate the bond-slip relationship, ultimate bond strength, bond toughness, and bond ductility. Similar to the findings on cementitious coated deformed rebar confined in concrete in a previous study by the authors, the results of the current study revealed that in the PCM, the cementitious coated rebar presents promising good bond performance regardless of the corrosion degree compared to the epoxy coated rebar. This is because when the ribs of the deformed rebars would deteriorate owing to corrosion, the rough surface of a cementitious coated rebar can sustain well its bond performance compared with the smooth and glassy surface of an epoxy coated rebar. Moreover, the direct effect of the surface roughness characteristics of these coating materials is clarified using coated round rebars. Consequently, the cementitious coated rebar achieves a considerably higher bond strength with a brittle behavior than the epoxy coated rebar, which presents a ductile behavior.

    DOI

  • Experimental study on the effect of anti-corrosive coatings on bond behavior of corroded rebar

    Mohammad Ridduhan L. Natino, Yizhou Yang, Hikaru Nakamura, Taito Miura

    Construction and Building Materials   274  2021年03月  [査読有り]

     概要を見る

    This research presents the investigation of the effect of anti-corrosive coatings on the bond behavior of corroded rebar to concrete. Cementitious and epoxy types of anti-corrosive coating materials have been considered and applied manually to rebar as the actual on-site repair procedure of corrosion-induced damaged reinforced concrete (RC) structure. Test specimens prepared were served to investigate the direct effect of coating materials and their combined effects with corrosion. Accelerated electric corrosion test was employed with a target degree of corrosion ranging from 5 to 10%. Laser scanning test was conducted to evaluate and quantify the changed on geometrical properties and surface roughness condition of the sound-coated, bare corroded, and corroded-coated rebar specimens. Finally, two end pull-out tests were conducted to measure the bond-slip relationship, ultimate bond strength, bond toughness and bond ductility. As an important finding, the anti-corrosive coating materials had a significant effect on the change of geometrical properties and surface roughness condition of deformed rebar that have a direct effect on bond behavior and mechanism. Cementitious coating compromised the relative rib area of rebar but enhanced its surface roughness, while epoxy coating maintained the relative rib area of rebar but compromised its surface roughness. Consequently, cementitious coated rebars provide the good bond performance regardless of corrosion degree compared to epoxy coated rebars.

    DOI

  • Numerical simulation of bond degradation subjected to corrosion-induced crack by simplified rebar and interface model using RBSM

    Yang Yizhou, Nakamura Hikaru, Yamamoto Yoshihito, Miura Taito

    Construction and Building Materials   247 ( 247 ) 118602 - 118602  2020年06月  [査読有り]

    担当区分:筆頭著者

     概要を見る

    ファイル公開:2022-06-30

    DOI CiNii

  • Influence of anti-corrosive coatings on bond behavior of corroded rebar

    Mohammad Ridduhan Natino, Yizhou Yang, Hikaru Nakamura, Taito Miura

    Proceedings of the fib Symposium 2020: Concrete Structures for Resilient Society     2205 - 2213  2020年  [査読有り]

    担当区分:筆頭著者

     概要を見る

    This research aims to investigate the influence of anti-corrosive coating on the bond behavior of coated corroded rebar to concrete. Two different types of anti-corrosive coating materials have been considered and each is to be applied manually. The test specimens are divided into six groups. Group I contains sound or non-corroded rebar serve as control group, Group II and III are the coated sound rebar groups serve to investigate the direct effect of coating, while Group IV is the bare corroded rebar group, and the Group V and VI are the coated corroded rebar groups. The accelerated electric corrosion method is employed for the Group IV-VI with a varying target degree of corrosion ranging from 5% to 10%. After the target corrosion degree is achieved, laser scanning test is conducted to investigate the change in geometrical properties of the sound/coated and the coated corroded rebar groups. Thereafter, Group I-III are casted and Group IV-VI are re-casted into new specimens and bond-slip relationships are measured through two-end pull out test. As important findings, the anti-corrosive coating materials have a significant influence on the bond behavior. Cementitious coated exhibits a brittle bond-slip behavior and shows a better performance as compared to epoxy coated with a ductile bond-slip behavior.

  • Effect of corrosion-induced crack and corroded rebar shape on bond behavior

    Yizhou Yang, Hikaru Nakamura, Taito Miura, Yoshihito Yamamoto

    Structural Concrete   20 ( 6 ) 2171 - 2182  2019年12月  [査読有り]

    担当区分:筆頭著者

     概要を見る

    This paper aims to investigate the individual effect of corrosion-induced crack, corroded rebar shape, and rust around rebar on the bond properties of reinforced concrete (RC) members. First, test specimens were corroded by accelerated electric corrosion method with varying corrosion degree ranging from 0 to 25%. Test specimens were divided into different groups. For the normal corrosion group, bond test was conducted directly after the corrosion test to investigate the combined effects including corrosion-induced crack, corroded rebar shape, and rust on bond deterioration. In another group, after corroded rebar was taken out from test specimen, rust was removed before casted into new concrete to evaluate single effect of corroded rebar shape. Similarly, corroded rebar with rust was casted into new concrete to evaluate the effect of the formation of rust on bond degradation. Experimental results quantitatively illustrate the influential factors including corrosion degree, corrosion crack width and geometry of corroded rebar. As the important finding, corrosion crack in concrete is concluded to be a more dominant factor than the corroded rebar shape and rust accumulation in bond deterioration mechanism. Moreover, rust accumulation contributes to the improvement of bond deterioration induced by corroded rebar shape.

    DOI

全件表示 >>

Misc 【 表示 / 非表示

  • [CS7-07] 構造模型を用いた インタラクティブラーニング 向上の取り組みその2

    花木 冬芽, 楊, 一舟, 王 海龍, 高柳 雅樹

    土木学会全国大会第76回年次学術講演会    2021年09月

  • Numerical investigation of effect of corrosion-induced crack on bond-slip relationship

    Yang Yizhou, Nakamura Hikaru, Yamamoto Yoshihito, Miura Taito

    構造工学論文集 A   65   589 - 599  2019年  [査読有り]

    担当区分:筆頭著者

     概要を見る

    <p>The bond degradation and degradation mechanism induced by corrosion-induced crack were investigated numerically using 3D RBSM in which rebar was modeled by solid elements without modeling explicitly the details of rebar ribs. The proposed method considers both corrosion expansion and shear stress transfer behavior from rebar by interface elements. Validation of the proposed model showed that it is possible to obtain reasonable bond performance of non-corroded specimen as mesoscale models and is capable of reproducing the bond deterioration caused by corrosion-induced crack. Finally, bond deterioration mechanism was investigated through the crack development and stress distribution, and the mechanism was found to be the combined effects of degradation of ring-tension stress around cracks and compressive stress near concrete cover, which induced by corrosion-induced crack.</p>

    DOI CiNii

受賞 【 表示 / 非表示

  • 令和2年度土木学会年次学術講演会 優秀論文賞

    2020年   土木学会  

  • 第40回コンクリート工学講演会 年次論文奨励賞

    2018年   日本コンクリート工学会  

講演・口頭発表等 【 表示 / 非表示

  • Investigation on structural behavior of existing prestressed post-tensioned concrete bridge superstructure

    Yizhou Yang

    令和2年度土木学会全国大会  

    発表年月: 2020年09月

  • Numerical investigation of effect of corrosion-induced crack on bond-slip relationship

    Yizhou Yang

    第65回構造工学シンポジウム  

    発表年月: 2019年04月

  • Effect of corrosion-induced crack and corroded rebar shape on bond behavior

    Yizhou Yang

    The International Federation for Structural Concrete 5th International fib Congress  

    発表年月: 2018年10月

  • Effect of corrosion-induced crack and corroded rebar profile on bond stress and slip relationship

    Yizhou Yang

    第40回コンクリート工学講演会  

    発表年月: 2018年07月

  • Numerical and experimental evaluation of bond-slip relationship of corroded rebar with different concrete cover thickness

    Yizhou Yang

    The 8th Asia and Pacific Young Researchers and Graduates Symposium  

    発表年月: 2017年09月

全件表示 >>

 

現在担当している科目 【 表示 / 非表示

全件表示 >>

担当経験のある科目(授業) 【 表示 / 非表示

  • Science and Engineering Laboratory

    2020年04月
    -
    継続中
     

  • 創造理工学部SHIP科目 Research Planning and Skill B

    早稲田大学  

    2020年04月
    -
    継続中
     

  • 創造理工学部SHIP科目 Research Planning and Skill A

    早稲田大学  

    2020年04月
    -
    継続中
     

  • 創造理工学部SHIP科目 Collaborative Workshop

    早稲田大学  

    2020年04月
    -
    継続中
     

  • 構造実験

    早稲田大学  

    2020年04月
    -
    継続中
     

全件表示 >>