NAGAI Kohei 長井宏平

Researcher Number	00451790
Other IDs
Affiliation (Current)	2025: 北海道大学, 公共政策学連携研究部, 教授 2025: 北海道大学, 工学研究院, 教授
Affiliation (based on the past Project Information) *help	2023 – 2024: 北海道大学, 工学研究院, 教授 2016 – 2023: 東京大学, 生産技術研究所, 准教授 2010 – 2014: 東京大学, 生産技術研究所, 准教授 2013: 東京大学, 大学院工学系研究科, 准教授 2008 – 2010: The University of Tokyo, 大学院・工学系研究科, 特任講師 2008: 東大, 工学(系)研究科(研究院), 助教 2007: The University of Tokyo, 大学院・工学系研究科, 助教
Review Section/Research Field	Principal Investigator Civil engineering materials/Construction/Construction management / Basic Section 22010:Civil engineering material, execution and construction management-related / Medium-sized Section 22:Civil engineering and related fields / Structural engineering/Earthquake engineering/Maintenance management engineering / Civil engineering materials/Construction/Construction management / Basic Section 22010:Civil engineering material, execution and construction management-related Except Principal Investigator Civil engineering materials/Construction/Construction management / Basic Section 22010:Civil engineering material, execution and construction management-related / Town planning/Architectural planning / Structural engineering/Earthquake engineering/Maintenance management engineering
Keywords	Principal Investigator コンクリート / 微細構造解析 / 離散解析 / 鉄筋腐食 / 腐食 / 繊維補強 / 鉄筋コンクリート / 内部推定 / 多方向ひび割れ / 鉄筋コンクリート構造 … More / AI / コンクリートひび割れ / 逆推定 / ひび割れ / ひび割れ進展 / 過密配筋 / 残存性能 / 頑健材料 / セメント系複合材料 / 空間平均構成則 / 繊維補強コンクリート / 付着モデル / 連続繊維補強 / 膨張 / 遅れエトリンガイト生成 / アルカリ骨材反応 / 補修材 / DEF / ASR / 損傷事例 / 大規模解析 / 表層品質 / 鉄筋かぶり / RBSM / 体積変化 / 機械学習 / 体積変化ひび割れ / コンクリート工学 / 補修 / コンクリート構造 / 凍結融解作用 / 付着 / 連続繊維シート補強 / FRP補強 / FRP / 補強 / 画像解析 / Landsat / 推定 / 人工衛星データ / 橋梁建設年 / 正規化水指数 / 人工衛星 / 橋梁建設年推定 / 画像分析 / 腐食劣化 / RC構造 / 離散解析手法 / 腐食パターン / 内部腐食分布推定 / 力学相互作用 / 土木材料 / 内部腐食 / 鉄筋付着 / 残存構造性能 / 配筋詳細 / RC接合部 / 数値解析 / 多軸応力 / 脆弱領域 / 鉄筋間通過 / 施工性能 / 微弱領域 / 横方向筋 / 定着性能 / 3次元離散解析 / 疲労特性 / 構造応答 / せん断特性 / FEM … More Except Principal Investigator 初期温度履歴 / 水和物 / ひび割れ要因 / 収縮特性 / 高炉セメントコンクリート / 初期高温履歴 / 耐久性 / 時間依存変形 / 熱作用 / 異種材料界面 / 社会関係資本 / 地域づくり / 住民組織 / 地域再生 / 社会ネットワーク / ソーシャルキャピタル / 限界集落 / 異方性 / 非線形有限要素解析 / Biotモデル / 疲労限界状態 / 動態 / 凝縮水 / ひび割れ / コンクリート系床版 / 硝化汚泥 / 生ゴミ / 練混ぜ技術 / 廃棄物処理 / 自己切返し / 生ゴミ処理 / コンクリートミキサー / かくはん装置 / コンポスト / 非直行ひび割れ / 環境作用 / 非直交ひび割れ / コンクリート構造 / マルチスケール / 移動荷重 / 高サイクル疲労 / 耐久性力学 Less

UHPCにより補強された腐食劣化RC構造のRBSM解析による性能評価Principal Investigator
- Principal Investigator
  
  長井宏平
- Project Period (FY)
  2024 – 2025
- Research Category
  
  Grant-in-Aid for JSPS Fellows
- Review Section
  
  Basic Section 22010:Civil engineering material, execution and construction management-related
- Research Institution
  Hokkaido University
高炉セメントコンクリートのひび割れ要件解明と水和物形態に基づく収縮抑制手法の開発
- Principal Investigator
  
  浅本晋吾
- Project Period (FY)
  2023 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 22010:Civil engineering material, execution and construction management-related
- Research Institution
  Saitama University
深層学習を実装した微細構造解析による鉄筋コンクリート内部損傷の逆推定と性能評価Principal Investigator
- Principal Investigator
  
  長井宏平
- Project Period (FY)
  2022 – 2024
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Review Section
  
  Medium-sized Section 22:Civil engineering and related fields
- Research Institution
  Hokkaido University
  The University of Tokyo
Development of mesoscale simulation system for evaluating the performance of repaired RC structuresPrincipal Investigator
- Principal Investigator
  
  NAGAI Kohei
- Project Period (FY)
  2021 – 2023
- Research Category
  
  Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
- Review Section
  
  Medium-sized Section 22:Civil engineering and related fields
- Research Institution
  Hokkaido University
  The University of Tokyo
腐食劣化したRC構造のFRP補強効果のRBSM微細構造解析による性能評価Principal Investigator
- Principal Investigator
  
  長井宏平
- Project Period (FY)
  2021 – 2022
- Research Category
  
  Grant-in-Aid for JSPS Fellows
- Review Section
  
  Basic Section 22010:Civil engineering material, execution and construction management-related
- Research Institution
  The University of Tokyo
Estimation of Bridge Construction Year System Using Satellite Landsat Data and AI AnalysisPrincipal Investigator
- Principal Investigator
  
  Nagai Kohei
- Project Period (FY)
  2020 – 2021
- Research Category
  
  Grant-in-Aid for Challenging Research (Exploratory)
- Review Section
  
  Medium-sized Section 22:Civil engineering and related fields
- Research Institution
  The University of Tokyo
腐食劣化したRC構造のFRP補強効果のRBSM微細構造解析による性能評価Principal Investigator
- Principal Investigator
  
  長井宏平
- Project Period (FY)
  2020 – 2022
- Research Category
  
  Grant-in-Aid for JSPS Fellows
- Review Section
  
  Basic Section 22010:Civil engineering material, execution and construction management-related
- Research Institution
  The University of Tokyo
Estimation and risk assessment of rebar corrosion distribution inside RC using mesoscale analysis and AI image analysisPrincipal Investigator
- Principal Investigator
  
  Nagai Kohei
- Project Period (FY)
  2019 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 22010:Civil engineering material, execution and construction management-related
- Research Institution
  The University of Tokyo
Estimation of internal corrosion degree of reinforcement in concrete using 3D meso-scale simulationPrincipal Investigator
- Principal Investigator
  
  NAGAI Kohei
- Project Period (FY)
  2018 – 2020
- Research Category
  
  Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  The University of Tokyo
化学的分析に基づいたコンクリート構造物の補修材付着性状のモデル化と構造性能評価Principal Investigator
- Principal Investigator
  
  長井宏平
- Project Period (FY)
  2018 – 2020
- Research Category
  
  Grant-in-Aid for JSPS Fellows
- Review Section
  
  Basic Section 22010:Civil engineering material, execution and construction management-related
- Research Institution
  The University of Tokyo
Study on interface variation between different materials in concrete depending on temperature history during hardening and its association with durability
- Principal Investigator
  
  Asamoto Shingo
- Project Period (FY)
  2017 – 2019
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  Saitama University
Evaluation of residual structural performance of damaged bridge members by three dimensional meso scale analysis and its retrofitPrincipal Investigator
- Principal Investigator
  
  NAGAI Kohei
- Project Period (FY)
  2016 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  The University of Tokyo
アジア域の劣化したＲＣ構造物の残存性能評価と補修のための大規模数値解析Principal Investigator
- Principal Investigator
  
  長井宏平
- Project Period (FY)
  2016 – 2018
- Research Category
  
  Grant-in-Aid for JSPS Fellows
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  The University of Tokyo
Numerical Simulation of failure of RC beam-column joint by 3D discrete analysis method and proposal of rational reinforcement bar arrangementPrincipal Investigator
- Principal Investigator
  
  NAGAI Kohei
- Project Period (FY)
  2013 – 2014
- Research Category
  
  Grant-in-Aid for Challenging Exploratory Research
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  The University of Tokyo
Development of robust fiber reinforced cementitious composite for structural materialPrincipal Investigator
- Principal Investigator
  
  NAGAI Kohei
- Project Period (FY)
  2012 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  The University of Tokyo
コンクリート系床版に内在する凝縮水の動態による早期疲労限界状態
- Principal Investigator
  
  前川宏一
- Project Period (FY)
  2011
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Structural engineering/Earthquake engineering/Maintenance management engineering
- Research Institution
  The University of Tokyo
An investigation of detailingroefinforced concrete by the evaluation of performance of anchorage and concrete compactionPrincipal Investigator
- Principal Investigator
  
  NAGAI Kouhei
- Project Period (FY)
  2011 – 2012
- Research Category
  
  Grant-in-Aid for Challenging Exploratory Research
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  The University of Tokyo
A Study of a Growth Process of Community-Based Organizations using a Social Network Analysis
- Principal Investigator
  
  SUZUKI Naofumi
- Project Period (FY)
  2011 – 2012
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Town planning/Architectural planning
- Research Institution
  Hitotsubashi University
A development of robust fiber reinforced cementitious composites under multi directional stress field and its applicationPrincipal Investigator
- Principal Investigator
  
  NAGAI Kouhei
- Project Period (FY)
  2010 – 2011
- Research Category
  
  Grant-in-Aid for Young Scientists (A)
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  The University of Tokyo
Multi-scale modeling of cementitious composites for performance assessment of reinforced concrete infrastructures subjected to coupled with high-cycle load and environmental impacts
- Principal Investigator
  
  MAEKAWA Koichi
- Project Period (FY)
  2008 – 2010
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  The University of Tokyo
重力駆動式自己切返し反応システムによる大規模コンポスト化装置の開発
- Principal Investigator
  
  石田哲也
- Project Period (FY)
  2008 – 2009
- Research Category
  
  Grant-in-Aid for Challenging Exploratory Research
- Research Field
  
  Civil engineering materials/Construction/Construction management
- Research Institution
  The University of Tokyo
development of fatigue constitutive model of fiber reinforced cementitious composites with multi-directional crackingPrincipal Investigator
- Principal Investigator
  
  NAGAI Kohei
- Project Period (FY)
  2008 – 2009
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Structural engineering/Earthquake engineering/Maintenance management engineering
- Research Institution
  The University of Tokyo
損傷を受けたRC部材性能照査のための三次元微細構造解析システムの構築Principal Investigator
- Principal Investigator
  
  長井宏平
- Project Period (FY)
  2007
- Research Category
  
  Grant-in-Aid for Young Scientists (Start-up)
- Research Field
  
  Structural engineering/Earthquake engineering/Maintenance management engineering
- Research Institution
  The University of Tokyo

[Journal Article] Mesoscale discrete simulation of flexural behavior of FRP-strengthened RC beams using 3D RBSM2024
- Author(s)
  Wenliang Yin, Cheng Jiang, Kohei Nagai
- Journal Title
  
  Engineering Structures
  
  Volume: 310 Pages: 118131-118131
- DOI
  10.1016/j.engstruct.2024.118131
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0072
[Journal Article] A mesoscale simulation of the FRP-to-concrete interfacial debonding propagation process by 3D RBSM2023
- Author(s)
  Cheng Jiang, Kumar Avadh, Kohei Nagai
- Journal Title
  
  Composite Structures
  
  Volume: 304 Pages: 116336-116336
- DOI
  10.1016/j.compstruct.2022.116336
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0072
[Journal Article] Simulation of moisture variations in concrete during prolonged alternate wetting and drying cycles using 3D discrete network model2023
- Author(s)
  Dheeraj Waghmare, Dawei Ren, Punyawut Jiradilok, Kohei Nagai
- Journal Title
  
  Case Studies in Construction Materials
  
  Volume: 19 Pages: e02553-e02553
- DOI
  10.1016/j.cscm.2023.e02553
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22H00224
[Journal Article] Investigating equivalency of different element models in discrete mesoscale analysis of ASR-damaged concrete2023
- Author(s)
  Jie Luo, Kohei Nagai
- Journal Title
  
  Construction and Building Materials
  
  Volume: 408 Pages: 133755-133755
- DOI
  10.1016/j.conbuildmat.2023.133755
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22H00224
[Journal Article] Reproducible estimations of internal corrosion distribution from surface cracks using MPC-RBSM2023
- Author(s)
  Suhas S. Joshi, Vikas Singh Kuntal, John E. Bolander, Kohei Nagai
- Journal Title
  
  Engineering Fracture Mechanics
  
  Volume: 292 Pages: 109642-109642
- DOI
  10.1016/j.engfracmech.2023.109642
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0072, KAKENHI-PROJECT-22H00224
[Journal Article] Analysis of Non-uniform Local Strain in Corroded Reinforcing Bar in Concrete using Digital Image Correlation2023
- Author(s)
  Haoyu Peng, Kumar Avadh, Kohei Nagai
- Journal Title
  
  ACT
  
  Volume: 21 Issue: 1 Pages: 42-57
- DOI
  10.3151/jact.21.42
- ISSN
  1346-8014, 1347-3913
- Year and Date
  2023-01-26
- Language
  English
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22H00224
[Journal Article] Mesoscale simulation of compression-induced cracking and failure of ASR-damaged concrete with stirrup confinement2023
- Author(s)
  Jie Luo, Shingo Asamoto, Kohei Nagai
- Journal Title
  
  Engineering Fracture Mechanics
  
  Volume: 277 Pages: 108977-108977
- DOI
  10.1016/j.engfracmech.2022.108977
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22H00224, KAKENHI-PROJECT-20H02219
[Journal Article] 3D RBSM Analysis of Bond Degradation in Corroded Reinforced Concrete as Observed Using Digital Image Correlation2022
- Author(s)
  Kumar Avadh, Kohei Nagai
- Journal Title
  
  Materials
  
  Volume: 15 Issue: 18 Pages: 6470-6470
- DOI
  10.3390/ma15186470
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22H00224
[Journal Article] Mesoscopic simulation of crack propagation and bond behavior in ASR damaged concrete with internal/external restraint by 3D RBSM2022
- Author(s)
  Jie Luo, Yi Wang, Shingo Asamoto, Kohei Nagai
- Journal Title
  
  Cement and Concrete Composites
  
  Volume: 129 Pages: 104488-104488
- DOI
  10.1016/j.cemconcomp.2022.104488
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22H00224, KAKENHI-PROJECT-20H02219
[Journal Article] Investigating the effect of rebar corrosion order and arrangement on cracking behaviour of RC panels using 3D discrete analysis2022
- Author(s)
  Suhas S. Joshi, Kumar Avadh, Vikas Singh Kuntal, Punyawut Jiradilok, KoheiNagai
- Journal Title
  
  Construction and Building Materials
  
  Volume: 325 Pages: 126730-126730
- DOI
  10.1016/j.conbuildmat.2022.126730
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Material comparative analysis of crack-bridging degradation of SFRC structural beams under flexural fatigue loading2022
- Author(s)
  Mohamed Adel, Koji Matsumoto, Tamon Ueda, Kohei Nagai
- Journal Title
  
  Construction and Building Materials
  
  Volume: 339 Pages: 127642-127642
- DOI
  10.1016/j.conbuildmat.2022.127642
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0072
[Journal Article] An analytical investigation of bond deterioration between rebar and ASR/DEF-damaged concrete with and without stirrup confinement using 3D RBSM2022
- Author(s)
  Jie Luo, Shingo Asamoto, Kohei Nagai
- Journal Title
  
  Construction and Building Materials
  
  Volume: 351 Pages: 128923-128923
- DOI
  10.1016/j.conbuildmat.2022.128923
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22H00224, KAKENHI-PROJECT-20H02219
[Journal Article] 3D mesoscale simulation of the influence of corrosion on loss of tension stiffening in reinforced concrete2022
- Author(s)
  Kumar Avadh, Punyawut Jiradilok, John E Bolander, Kohei Nagai
- Journal Title
  
  Construction and Building Materials
  
  Volume: 339 Pages: 127684-127684
- DOI
  10.1016/j.conbuildmat.2022.127684
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22H00224
[Journal Article] Estimating corrosion levels along confined steel bars in concrete using surface crack measurements and mesoscale simulations guided by model predictive2021
- Author(s)
  Vikas Singh Kuntal, Punyawut Jiradilok, John E Bolander, Kohei Nagai
- Journal Title
  
  Cement and Concrete Composites
  
  Volume: 124 Pages: 104233-104233
- DOI
  10.1016/j.cemconcomp.2021.104233
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Investigation of the effects of multiple and multi-directional reinforcement on corrosion-induced concrete cracking pattern2021
- Author(s)
  Hafiza Fatima Zahid, Punyawut Jiradilok, Vikas Singh Kuntal, Kohei Nagai
- Journal Title
  
  Construction and Building Materials
  
  Volume: 283 Pages: 122594-122594
- DOI
  10.1016/j.conbuildmat.2021.122594
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Mesoscale simulation of pull-out performance for corroded reinforcement with stirrup confinement in concrete by 3D RBSM2021
- Author(s)
  Kumar Avadh, Punyawut Jiradilok, John E Bolander, Kohei Nagai
- Journal Title
  
  Cement and Concrete Composites
  
  Volume: 116 Pages: 103895-103895
- DOI
  10.1016/j.cemconcomp.2020.103895
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18KK0399, KAKENHI-PROJECT-19H02210
[Journal Article] Direct observation of the local bond behavior between corroded reinforcing bars and concrete using digital image correlation2021
- Author(s)
  Kumar Avadh, Punyawut Jiradilok, John E Bolander, Kohei Nagai
- Journal Title
  
  Cement and Concrete Composites
  
  Volume: 123 Pages: 104180-104180
- DOI
  10.1016/j.cemconcomp.2021.104180
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Discrete mechanical models of concrete fracture2021
- Author(s)
  John E Bolander, Jan Elias, Gianluca Cusatis, Kohei Nagai
- Journal Title
  
  Engineering Fracture Mechanics
  
  Volume: 257 Pages: 108030-108030
- DOI
  10.1016/j.engfracmech.2021.108030
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Estimation of internal corrosion degree from observed surface cracking of concrete using meso-scale simulation with Model Predictive Control2020
- Author(s)
  Vikas Singh Kuntal, Punyawut Jiradilok, John E Bolander, Kohei Nagai
- Journal Title
  
  Computer-Aided Civil and Infrastructure Engineering
  
  Volume: September Issue: 5 Pages: 544-559
- DOI
  10.1111/mice.12620
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18KK0399, KAKENHI-PROJECT-19H02210
[Journal Article] Vision Based Pixel-level bridge Structural Damage Detection Using a Link ASPP Network2020
- Author(s)
  Wenlong Deng, Yongli Mou, Takahiro Kashiwa, Sergio Escalera, Kohei Nagai, Kotaro Nakayama, Yutaka Matsuo, Helmut Prendinger
- Journal Title
  
  Automation in Construction
  
  Volume: 110 Pages: 102973-102973
- DOI
  10.1016/j.autcon.2019.102973
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Investigation on Local Bond Behavior in Concrete and Cement Paste around a Deformed Bar by Using DIC Technique2020
- Author(s)
  2Ahmed Okeil, Koji Matsumoto, Kohei Nagai
- Journal Title
  
  Cement and Concrete Composites
  
  Volume: 109 Pages: 103540-103540
- DOI
  10.1016/j.cemconcomp.2020.103540
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Development of discrete meso-scale bond model for corrosion damage at steel-concrete interface based on tests with/without concrete damage2020
- Author(s)
  Punyawut JIRADILOK, Yi WANG, Kohei NAGAI, Koji MATSUMOTO
- Journal Title
  
  Construction and Building Materials
  
  Volume: 236 Pages: 117615-117615
- DOI
  10.1016/j.conbuildmat.2019.117615
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Discrete Mesoscale Analysis of Adhesive Anchors Under Tensile Load Taking into Account Post-installed Reinforcement2020
- Author(s)
  Seyed Yaser Mousavi Siamakani, Punyawut Jiradilok, Kohei Nagai, Raktipong Sahamitmongko
- Journal Title
  
  Construction and Building Materials
  
  Volume: 262 Pages: 120778-120778
- DOI
  10.1016/j.conbuildmat.2020.120778
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] A mesoscale discrete model for mechanical performance of concrete damaged by coupled ASR and DEF2020
- Author(s)
  Wang Yi、Jiradilok Punyawut、Nagai Kohei、Asamoto Shingo
- Journal Title
  
  Engineering Fracture Mechanics
  
  Volume: 232 Pages: 107055-107055
- DOI
  10.1016/j.engfracmech.2020.107055
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17H03285, KAKENHI-PROJECT-18F18348, KAKENHI-PROJECT-20H02219
[Journal Article] Analytical investigation of the role of reinforcement in perpendicular beams of beam-column knee joints by 3D meso-scale model2020
- Author(s)
  Liyanto Eddy, Punyawut Jiradilok, Koji Matsumoto, Kohei Nagai
- Journal Title
  
  Engineering Structures
  
  Volume: 210 Pages: 110347-110347
- DOI
  10.1016/j.engstruct.2020.110347
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Multi-class Structural Damage Segmentation Using Fully Convolutional Networks2019
- Author(s)
  Helmut Prendinger, Juanjo Rubio, Takahiro Kashiwa, Yutaka Matsuo, Kohei Nagai, Teera Laiteerapong, Wenlong Deng, Kotaro Nakayama, Sergio Escalera
- Journal Title
  
  Computers in Industry
  
  Volume: 112 Pages: 103121-103121
- DOI
  10.1016/j.compind.2019.08.002
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Meso-scale Modeling of Non-uniformly Corroded Reinforced Concrete Using 3D Discrete Analysis2019
- Author(s)
  Punyawut JIRADILOK, Koji MATSUMOTO, Kohei NAGAI
- Journal Title
  
  Engineering Structures
  
  Volume: 197 Pages: 109378-109378
- DOI
  10.1016/j.engstruct.2019.109378
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19H02210
[Journal Article] Expansive cracking and compressive failure simulations of ASR and DEF damaged concrete using a mesoscale discrete model2019
- Author(s)
  Wang Yi、Meng Yushi、Jiradilok Punyawut、Matsumoto Koji、Nagai Kohei、Asamoto Shingo
- Journal Title
  
  Cement and Concrete Composites
  
  Volume: 104 Pages: 103404-103404
- DOI
  10.1016/j.cemconcomp.2019.103404
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17H03285, KAKENHI-PROJECT-18F18348
[Journal Article] Investigation on Quality of Thin Concrete Cover using Mercury Intrusion Porosimetry and Non-destructive Tests2018
- Author(s)
  Liyanto EDDY, Koji MATSUMOTO, Kohei NAGAI, Piyaphat CHAEMCHUEN, Michael HENRY, Kota HORIUCHI
- Journal Title
  
  Journal of Asian Concrete Federation
  
  Volume: Vol.4, No.1 Pages: 47-66
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16F16374
[Journal Article] インドで発生したPC枕木のひび割れの原因究明とASRおよびDEFの相互作用2018
- Author(s)
  安藤陽子，片山哲哉，浅本晋吾，長井宏平
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: 40 Pages: 909-914
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17H03285
[Journal Article] Simple Monitoring System for Damaged Bridges in Myanmar2018
- Author(s)
  Liyanto EDDY, Takeshi MIYASHITA, Koji MATSUMOTO, Kohei NAGAI, Win Bo
- Journal Title
  
  Journal of Disaster Research
  
  Volume: 13 Pages: 80-87
- NAID
  130007491159
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16F16374
[Journal Article] Investigation of Effect of Local Bond Model on Crack Propagation in RC using 3D RBSM2018
- Author(s)
  Liyanto EDDY, Koji MATSUMOTO, Kohei NAGAI, Zhen WANG
- Journal Title
  
  Proceeding of the Computational Modelling of Concrete and Concrete Structures (Euro-C 2018)
  
  Volume: - Pages: 755-766
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16F16374
[Journal Article] Development of Bond Deterioration Model in Corroded RC Member for Discrete Analysis Model2018
- Author(s)
  Kohei NAGAI, Punyawut JIRADILOK, Koji MATSUMOTO
- Journal Title
  
  Proceedings of 17th International Symposium on New Technology for Urban Safety of Mega Cities in Asia (USMCA)
  
  Volume: -
- NAID
  130007685266
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Fatigue Pull-out Failure of Deformed Bars in Concrete under the Effect of Liquid Water2018
- Author(s)
  Koji MATSUMOTO, Hirofumi YAMAGUCHI, Kohei NAGAI
- Journal Title
  
  Cement and Concrete Composites
  
  Volume: 91 Pages: 198-208
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Development of Spatial Corrosion Damage Simulation Based on Rigid Body Spring Model2018
- Author(s)
  Punyawut JIRADILOK, Kohei NAGAI, Koji MATSUMOTO
- Journal Title
  
  Proceedings of 12th fib International PhD Symposium in Civil Engineering
  
  Volume: - Pages: 467-475
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Investigation on Strengthening Approaches Adopted for Poorly Detailed RC Corbels2017
- Author(s)
  Ram Chandra NEUPANE, Liyanto EDDY, Kohei NAGAI
- Journal Title
  
  fibers
  
  Volume: 5 Pages: 16-16
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Investigation on possible causes of expansion damages in concrete - a case study of sleepers in Indian Railways2017
- Author(s)
  A. Awasthi, K. Matsumoto, K. Nagai, S. Asamoto and S. Goto
- Journal Title
  
  Journal of Asian Concrete Federation
  
  Volume: 3 Pages: 49-66
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H03285
[Journal Article] Investigation on Possible Causes of Expansion Damages in Concrete - a Case Study of Sleepers in Indian Railways2017
- Author(s)
  Anupam AWASTHI, Koji MATSUMOTO, Kohei NAGAI, Shingo ASAMOTO, Seishi GOTO
- Journal Title
  
  Journal of Asian Concrete Federation
  
  Volume: 3 Pages: 49-66
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Mesoscale Analysis of RC Anchorage Performance in Multidirectional Reinforcement Using a Three-Dimensional Discrete Model2017
- Author(s)
  Daisuke HAYASHI, Kohei NAGAI, Liyanto EDDY
- Journal Title
  
  Journal of Structural Engineering, ASCE
  
  Volume: 143
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16F16374
[Journal Article] Meso-scale Approach to Investigate the Bond Performance of Anchorage in Reinforced Concrete2016
- Author(s)
  Daisuke HAYASHI, Kohei NAGAI:
- Journal Title
  
  Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-9)
  
  Volume: -
- DOI
  10.21012/fc9.123
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] A Study on the Effect of Diagonal Cracks Opening on the Failure Behavior of RC Beam-column Join with Mechanical Anchorage by 3D RBSM2016
- Author(s)
  Kohei NAGAI, Liyanto EDDY
- Journal Title
  
  Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-9)
  
  Volume: -
- DOI
  10.21012/fc9.114
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Numerical Simulation of Beam-column Knee Joints with Mechanical Anchorages by 3D Rigid Body Spring Model2016
- Author(s)
  Liyanto EDDY, Kohei NAGAI
- Journal Title
  
  Engineering Structures
  
  Volume: 126 Pages: 547-558
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Mesoscopic Analysis of Different Expansion Causes in Concrete by 3D Rigid Body Spring Model2016
- Author(s)
  Liyanto EDDY, Anupam AWASTHI, Koji MATSUMOTO, Kohei NAGAI, Shingo ASAMOTO
- Journal Title
  
  Proceedings of 15th International Symposium on New Technology for Urban Safety of Mega Cities in Asia (USMCA)
  
  Volume: -
- NAID
  130005872092
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Investigation on the Pull-out Behavior of Deformed Bars in Cracked Reinforced Concrete2016
- Author(s)
  Koji MATSUMOTO, Tao WANG, Daisuke HAYASHI, Kohei NAGAI
- Journal Title
  
  Journal of Advanced Concrete Technology
  
  Volume: 14 Pages: 573-589
- NAID
  130005418889
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Effect of Perpendicular Beams on Failure of Beam-column Knee Joints with Mechanical Anchorages by 3D RBSM2016
- Author(s)
  Liyanto EDDY, Koji MATSUMOTO, Kohei NAGAI
- Journal Title
  
  Journal of Asian Concrete Federation
  
  Volume: 2 Pages: 56-66
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] A Proposal of Installation of Simple Monitoring System for Damaged Bridges in Myanmar2016
- Author(s)
  Liyanto EDDY, Koji MATSUMOTO, Kohei NAGAI, Takeshi MIYASHITA, Zin Naung Htut
- Journal Title
  
  Proceedings of The 6th International Conference of ACF (ACF2016)
  
  Volume: -
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16F16374
[Journal Article] Effect of Transverse Bar on Anchorage Performance in Damaged RC with Mechanical Anchorage2016
- Author(s)
  Tao WANG, Koji MATSUMOTO, Kohei NAGAI
- Journal Title
  
  Proceedings of the 11th fib International PhD Symposium in Civil Engineering
  
  Volume: - Pages: 485-492
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Development of Rebar Corrosion Expansion Model based on 3D RBSM Simulation2016
- Author(s)
  Punyawut JIRADILOK, Kohei NAGAI, Koji MATSUMOTO, Liyanto EDDY
- Journal Title
  
  roceedings of The 6th International Conference of ACF (ACF2016)
  
  Volume: -
- Data Source
  KAKENHI-PROJECT-16F16374
[Journal Article] 橋梁定期点検調書における写真の撮り方および記載単語の基礎的傾向分析2016
- Author(s)
  小黒蓮，井林康，長井宏平
- Journal Title
  
  土木学会第71回年次学術講演会
  
  Volume: 71, Ⅴ Pages: 77-78
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Report of Monitoring Results of Main Tower Inclination of Twantay Bridge in Myanmar2016
- Author(s)
  Liyanto EDDY, Kohei NAGAI, Koji MATSUMOTO, Takeshi MIYASHITA, Win Bo
- Journal Title
  
  Proceedings of The Seventh International Conference on Science and Engineering (ICSE 2016)
  
  Volume: -
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16F16374
[Journal Article] 新潟県及び県下市町村管理橋梁の経年劣化傾向比較2016
- Author(s)
  松藤洋照，長井宏平，井林康
- Journal Title
  
  土木学会第71回年次学術講演会
  
  Volume: 71, Ⅰ Pages: 179-180
- Data Source
  KAKENHI-PROJECT-16H04388
[Journal Article] Numerical Simulation of Failure of Anchorage with Shifted Mechanical Anchorage Bars by 3D Discrete Model2014
- Author(s)
  Kohei NAGAI, Daisuke HAYASHI, Liyanto EDDY
- Journal Title
  
  Advances in Structural Engineering
  
  Volume: 17 Pages: 861-870
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25630184
[Journal Article] Numerical Simulation of Failure of Beam Column Joint with Complex Reinforcement Arrangement by 3D Discrete Model2014
- Author(s)
  Liyanto EDDY, Kohei NAGAI
- Journal Title
  
  Proceedings of The 6th International Conference of Asian Concrete Federation (ACF2014)
  
  Volume: 1
- Data Source
  KAKENHI-PROJECT-25630184
[Journal Article] 画像解析システムを用いた粗骨材入りPVA-ECC梁のせん断特性の検証2014
- Author(s)
  高野芳行, 小島梨恵子, 長井宏平
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: 36 Pages: 1141-1146
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24360167
[Journal Article] Structural Strengthening of RC Corbel Subjected to Local Failure Criterion by External CFRP Wrap2014
- Author(s)
  Ram Chandra NEUPANE, Kohei NAGAI
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: 36 Pages: 1255-1260
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24360167
[Journal Article] 三次元離散解析手法による多方向配筋時のRC定着性能の微細構造解析2013
- Author(s)
  林大輔、長井宏平
- Journal Title
  
  土木学会論文集E2
  
  Volume: Vol.69, No.2 Pages: 241-257
- NAID
  130004559862
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25630184
[Journal Article] L字型RC柱梁接合部の破壊性状に及ぼす鉄筋曲げ内半径の影響に関する解析的研究2013
- Author(s)
  生田浩一郎，長井宏平，林大輔，吉武謙二
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: Vol.35，No.2 Pages: 235-240
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25630184
[Journal Article] 柱梁接合部の構造性能に及ぼす梁主鉄筋の曲げ内半径および寸法効果の影響2012
- Author(s)
  吉武謙二，小倉大季，小川晃，長井宏平，林大輔
- Journal Title
  
  土木学会第67回年次学術講演会
  
  Volume: Vol 67 Pages: 501-502
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] An Analytical Investigation of Anchorage Performance of Mechanical Anchorage by 3D Discrete Model2012
- Author(s)
  Kohei NAGAI, Daisuke HAYASHI
- Journal Title
  
  Proceedings of The 4th Asia-Pacific Young Researchers &Graduates Symposium
  
  Volume: Vol.1 Pages: 130-138
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] Three-Dimensional Analysis of Flow of Fresh Concrete as Two Phase Model by MPS2012
- Author(s)
  Koichro IKUTA, Kohei NAGAI
- Journal Title
  
  土木学会第67回年次学術講演会
  
  Volume: Vol 67 Pages: 135-136
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] 三次元離散解析による鉄筋あきが定着性能に及ぼす影響の評価2012
- Author(s)
  林大輔，長井宏平，吉武謙二、小倉大季
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: Vol.34，No.1 Pages: 559-564
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] Investigating the effects of reinforcement arrangement on the anchorage of reinforcement using the three-dimensional discrete analysis2012
- Author(s)
  Daisuke HAYASHI, Kohei NAGAI, Benny SURYANTO
- Journal Title
  
  Proceedings of the 4th Bond in Concrete Conference
  
  Volume: Vol. 1 Pages: 185-192
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] Shear Performance of PVA-Coarse Aggregate-ECC Beams Under a Rotating Stress Field2012
- Author(s)
  Yoshiyuki TAKANO, Benny SURYANTO, Kohei NAGAI
- Journal Title
  
  Proceedings of 11th International Symposium on New Technology for Urban Safety of Mega Cities in Asia (USMCA)
  
  Pages: 375-383
- Data Source
  KAKENHI-PROJECT-24360167
[Journal Article] A Survey of Social Support Networks in a Depopulating Japanese Village2012
- Author(s)
  Yagi, U., Nagai, K., Suzuki, N. and Matous, P.
- Journal Title
  
  Journal of Society for Social Management Systems
  
  Volume: SMS12-4216
- NAID
  120006665932
- URL
  http://management.kochi-tech.ac.jp/ssms_papers/sms12-4216_cc597e21d6d72a605259942dbe4d4313.pdf
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23760568
[Journal Article] Numerical Simulation of Beam-Column Joint with Simple Reinforcement Arrangement by Three-dimensional RBSM2012
- Author(s)
  Koichro IKUTA, Daisuke HAYASHI, Kohei NAGAI
- Journal Title
  
  Proceedings of 11th International Symposium on New Technology for Urban Safety of Mega Cities in Asia (USMCA)
  
  Volume: Vol. 1 Pages: 173-180
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] 三次元離散解析による鉄筋あきが定着性能に及ぼす影響の評価2012
- Author(s)
  林大輔,長井宏平,吉武謙二、小倉大季
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: Vol.34,No.1 Pages: 559-564
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] Three-Dimensional Analysis of Flow ofFresh Concrete as Two Phase Model by MPS2012
- Author(s)
  Koichro IKUTA, Kohei NAGAI
- Journal Title
  
  土木学会第67回年次学術講演会
  
  Volume: Vol.67 Pages: 135-136
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] "Investigating the effects of reinforcement arrangement on the anchorage of reinforcement using the three-dimensional discrete analysis"Proceedings of the 4th Bond in Concretreeinforcement arrangement on the Conference2012
- Author(s)
  Daisuke HAYASHI, Kohei NAGAI
- Journal Title
  
  Benny SURYANTO
  
  Volume: Vol.1 Pages: 185-192
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] ３次元離散解析による定着法と構成材料の定着部破壊性状への影響の検討2011
- Author(s)
  林大輔，井上友，長井宏平
- Journal Title
  
  コンクリートと補強材の付着挙動と付着構成則に関するシンポジウム論文集
  
  Volume: 1 Pages: 309-319
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] Shear Fatigue Performance and Crack Surface Observations in PVA-ECC Beams without Web Reinforcement2011
- Author(s)
  Benny SURYANTO, Mahyarudin DALIMUNTHE, Kohei NAGAI, Koichi MAEKAWA
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: 33, 2 Pages: 1279-1284
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] Pre-and Post-Yielding Tensile Behaviors of R/HPFRCC2011
- Author(s)
  Mahyarudin DALIMUNTHE, Benny SURYANTO, Kohei NAGAI
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: 33, 2 Pages: 1231-1236
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] Three-dimensional Analysis of Anchorage Failure of RC by Discrete Analysis Method2011
- Author(s)
  Daisuke HAHASHI, Kohei NAGAI, Yu INOUE
- Journal Title
  
  Proceedings of International Conference on Recent Advances in Nonlinear Models CoRAN2011
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] Space-averaged Constitutive model for HPFRCC with Multi-directional Cracking2011
- Author(s)
  Kohei NAGAI, Benny SURYANTO, Koichi MAEKAWA
- Journal Title
  
  ACI Material Journal
  
  Volume: 108, 2 Pages: 139-149
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] Space-averaged Constitutive model for HPFRCC with Multi-directional Cracking2011
- Author(s)
  Kohei NAGAI, Benny SUEYANTO, Koichi MAEKAWA
- Journal Title
  
  ACI Material Journal
  
  Volume: 108 Pages: 139-149
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] Space-Averaged Constitutive Model for HPFRCCs with Multi-Directional Cracking2011
- Author(s)
  Kohei NAGAI, Benny SURYANTO, Koichi MAEKAWA
- Journal Title
  
  ACI Material Journal
  
  Volume: Vol.108, No.2 Pages: 139-149
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] 3次元離散解析による定着法と構成材料の定着部破壊性状への影響の検討2011
- Author(s)
  林大輔,井上友,長井宏平
- Journal Title
  
  コンクリートと補強材の付着挙動と付着構成則に関するシンポジウム論文集
  
  Volume: Vol.1 Pages: 309-319
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] Space-Averaged Constitutive Model for HPFRCCs with Multi- Directional Cracking2011
- Author(s)
  Kohei NAGAI, Benny SURYANTO, Koichi MAEKAWA
- Journal Title
  
  ACI Material Journal Vol.108,No.2
  
  Pages: 139-149
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] Pre- and Post-Yielding Tensile Behaviors of R/HPFRCC2011
- Author(s)
  Mahyarudin DALIMUNTHE, Benny SURYANTO, Kohei NAGAI
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: 33 Pages: 1231-1236
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] 三次元RBSM解析による鉄筋コンクリートの定着性能の評価2011
- Author(s)
  井上友，長井宏平
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: 33 Pages: 643-648
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] Control of Cracking Direction of SHCC under Principal Stress Rotation with Coarse Aggregate2011
- Author(s)
  Kohei NAGAI, Benny SURYANTO, Koichi MAEKAWA, Tetsushi KANDA
- Journal Title
  
  Proceedings of Second Rilem International Conference on Strain Hardening Cementitious Composites
  
  Volume: (inCD-ROM)
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] 定着長を変化させたフックのひずみ分布と三次元解析による検討2011
- Author(s)
  林大輔，井上友，長井宏平
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: 33 Pages: 589-594
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23656278
[Journal Article] Bidirectional Multiple Cracking Tests on HPFRCC Plates2010
- Author(s)
  Benny SURYANTO, Kohei NAGAI, Koichi MAEKAWA
- Journal Title
  
  ACI Materials Journal (掲載確定印刷中)
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20760299
[Journal Article] Investigating Shear Transfer Across Cracks in High Performance Steel Fiber-reinforced Concrete2010
- Author(s)
  Benny Suryanto, Kohei Nagai, Koichi Maekawa
- Journal Title
  
  コンクリート工学年次論文集 Vol.32,No.2
  
  Pages: 1285-1290
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] Modeling and Analysis of Shear-critical ECC Members with Aniso tropic Stress and Strain Fields2010
- Author(s)
  Benny SURYANTO, Kohei NAGAI, Koichi MAEKAWA
- Journal Title
  
  Journal of Advanced Concrete Technology
  
  Volume: 8 Pages: 239-258
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] Smeared-crack modeling of R/ECC membranes incorporating an explicit shear transfer model2010
- Author(s)
  Benny SURYANTO, Kohei NAGAI, Koichi MAEKAWA
- Journal Title
  
  Journal of Advanced Concrete Technology
  
  Volume: Vol.8, No.3 Pages: 315-326
- NAID
  130000428255
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] Bidirectional Multiple Cracking Tests on High-Performance Fiber-Reinforced Cementitious Composite Plates2010
- Author(s)
  Benny Suryanto, Kohei Nagai, Koichi Maekawa
- Journal Title
  
  ACI Materials Journal
  
  Volume: September-October Pages: 450-460
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] Investigating Shear Transfer Across Cracks in High Performance Steel Fiber-reinforced Concrete2010
- Author(s)
  Benny Suryanto, Kohei Nagai, Koichi Maekawa
- Journal Title
  
  コンクリート工学年次論文集
  
  Volume: Vol.32, No.2 Pages: 1285-1290
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] Modeling and Analysis of Shear-critical ECC Members with Anisotropic Stress and Strain Fields2010
- Author(s)
  Benny SURYANTO, Kohei NAGAI, Koichi MAEKAWA
- Journal Title
  
  Journal of Advanced Concrete Technology
  
  Volume: Vol.8, No.2 Pages: 239-258
- NAID
  130000300092
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] Smeared-crack modeling of R/ECC membranes incorporating an explicit shear transfer model2010
- Author(s)
  Benny Suryanto, Kohei Nagai, Koichi Maekawa
- Journal Title
  
  Journal of Advanced Concrete Technology
  
  Volume: Vol.8, No.3 Pages: 315-326
- NAID
  130000428255
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] Modeling and analysis of shear-critical ECC members with anisotropic stress and strain fields2010
- Author(s)
  Benny Suryanto, Kohei Nagai, Koichi Maekawa
- Journal Title
  
  Journal of Advanced Concrete Technology
  
  Volume: Vol.8, No.2 Pages: 239-258
- NAID
  130000300092
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] Bidirectional Multiple Cracking Tests on HPFRCC Plates2010
- Author(s)
  Benny SURYANTO, Kohei NAGAI, Koichi MAEKAWA
- Journal Title
  
  ACI Materials Journal (印刷中(掲載確定))
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20760299
[Journal Article] Bidirectional Multiple Cracking Tests on High-Performance Fiber-Reinforced Cementitious Composite Plates2010
- Author(s)
  Benny Suryanto, Kohei Nagai, Koichi Maekawa
- Journal Title
  
  ACI Materials Journal September-October
  
  Pages: 450-460
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] Smeared-crack modeling of R/ECC membranes incorporating an explicit shear transfer model2010
- Author(s)
  Benny Suryanto, Kohei Nagai, Koichi Maekawa
- Journal Title
  
  Journal of Advanced Concrete Technology Vol.8,No.3
  
  Pages: 315-326
- NAID
  130000428255
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] Smeared-crack modeling of R/ECC membranes incorporating an explicit sheartransfer model2010
- Author(s)
  Benny SURYANTO, Kohei NAGAI, Koichi MAEKAWA
- Journal Title
  
  Journal of Advanced Concrete Technology
  
  Volume: 8 Pages: 315-326
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22686042
[Journal Article] Modeling and analysis of shear-critical ECC members with anisotropic stress and strain fields2010
- Author(s)
  Benny Suryanto, Kohei Nagai, Koichi Maekawa
- Journal Title
  
  Journal of Advanced Concrete Technology Vol.8,No.2
  
  Pages: 239-258
- NAID
  130000300092
- Data Source
  KAKENHI-PROJECT-20246073
[Journal Article] Role of Coarse Aggregate in High Performance Fiber Reinforced Cementitious Composite2009
- Author(s)
  Benny SURYANTO, Kohei NAGAI, Koichi MAEKAWA
- Journal Title
  
  コンクリート工学年次論文報告集 Vol.31No.1
  
  Pages: 385-390
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20760299
[Journal Article] Role of Coarse Aggregate in High Performance Fiber Reinforced Cementitious Composite2009
- Author(s)
  Benny SURYANTO, Kohei NAGAI, Koichi MAEKAWA
- Journal Title
  
  コンクリート工学年次論文報告集 31
  
  Pages: 385-390
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20760299
[Journal Article] 二方向ひび割れを有するHPFRCCの空間平均化構成モデルの構築2008
- Author(s)
  長井宏平, BennySURYANTO, 前川宏
- Journal Title
  
  コンクリート工学年次論文集(掲載決定) 30
- NAID
  110009697435
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19860026
[Journal Article] 二方向ひび割れを有するHPFRCCの空間平均化構成モデルの構築(Development of Spatially Averaged Constitutive Model of PFRCC with Bi-directional Cracking)2008
- Author(s)
  長井宏平, Suryanto Benny, 前川宏一
- Journal Title
  
  コンクリート工学年次論文報告集 Vol.30No.1
  
  Pages: 225-230
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20760299
[Journal Article] A Bi-directional cracking test of high performance fiber reinforced cementitious composite2008
- Author(s)
  Benny SURYANTO, 長井宏平, 前川宏
- Journal Title
  
  コンクリート工学年次論文集(掲載決定) 30
- NAID
  110009697444
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19860026
[Journal Article] 二方向ひび割れを有するHPFRCCの空間平均化構成モデルの構築2008
- Author(s)
  長井宏平
- Journal Title
  
  コンクリート工学年次論文報告集 30
  
  Pages: 225-230
- NAID
  110009697435
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20760299
[Journal Article] A Bi-directional Cracking Test of High Performance Fiber Reinforced Cementitious Composite2008
- Author(s)
  Suryanto Benny, 長井宏平, 前川宏一
- Journal Title
  
  コンクリート工学年次論文報告集 Vol.30No.1
  
  Pages: 279-284
- NAID
  110009697444
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20760299
[Journal Article] Numerical Analysis of Secondary Rotated Cracking Behavior of Fiber Reinforced Cementitious Composite Plate2008
- Author(s)
  Kohei NAGAI
- Journal Title
  
  Proceedings of CONCREEP8(CD)
- Data Source
  KAKENHI-PROJECT-20760299
[Journal Article] Numerical Analysis of Secondary Rotated Cracking Behavior of Fiber Reinforced Cementitious Composite Plate2008
- Author(s)
  Kohei NAGAI, Suryanto Benny, Koichi MAEKAWA
- Journal Title
  
  Proceedings of CONCREEP8 (CD)
- Data Source
  KAKENHI-PROJECT-20760299
[Presentation] Discrete Analysis System for Estimation of Corrosion Level in Concrete from Surface Crack Using Model Predictive Control2019
- Author(s)
  Vikas Singh KUNTAL, Punyawut JIRADILOK, Kohei NAGAI
- Organizer
  3rd ACF Symposium
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Presentation] Effect of Stirrup Confinement on Residual Bond Performance of Corroded RC by 3D RBSM2019
- Author(s)
  Punyawut JIRADILOK, Kumar AVADH, Kohei NAGAI
- Organizer
  18th International Symposium on New Technologies for Urban Safety of Mega Cities in Asia (USMCA)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Presentation] Simulating Hydraulic Fracturing Processes in Cement Composites Using Tough-RBSM2019
- Author(s)
  Daisuke ASAHINA, Mikio TAKEDA, Kohei NAGAI
- Organizer
  10th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-X)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Presentation] Analytical Investigation of the Influence of Rebar Arrangement on Corrosion Crack Pattern By RBSM2019
- Author(s)
  Punyawut JIRADILOK, Vikas Singh KUNTAL, Kohei NAGAI, Koji MATSUMOTO
- Organizer
  10th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-X)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Presentation] Parametrical Analysis of Stress and Crack Development in Concrete due to ASR and DEF based on a Discrete Model2019
- Author(s)
  Yi WANG, Punyawut JIRADILOK, Kohei NAGAI
- Organizer
  9th East Asia-Pacific Young Researchers and Graduates Symposium (YRGS 2019)
- Data Source
  KAKENHI-PROJECT-18F18348
[Presentation] Visualization of Local Bond Behavior of Corroded Reinforced Concrete by Using DIC Technique2019
- Author(s)
  Kumar AVADH, Ahmed Okeil Mohamed Atia, Punyawut JIRADILOK, Kohei NAGAI
- Organizer
  3rd ACF Symposium
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Presentation] nvestigation of Combined ASR and DEF Induced Damage on Concrete by Using RBSM Simulation2019
- Author(s)
  Yi WANG, Punyawut JIRADILOK, Kohei NAGAI
- Organizer
  16th East Asia-Pacific Conference on Structural Engineering & Construction (EASEC16)
- Data Source
  KAKENHI-PROJECT-18F18348
[Presentation] nvestigation of Local Opening-sliding Relationship in the Vicinity of Deformed Bar in Concrete by Using DIC Technique2019
- Author(s)
  Ahmed Okeil Mohamed Atia, Rhea UPADHYAY, Koji MATSUMOTO, Kohei NAGAI
- Organizer
  10th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-X)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H02210
[Presentation] Development of Bond Deterioration Model in Corroded RC Member for Discrete Analysis Model2018
- Author(s)
  長井宏平
- Organizer
  Proceedings of 17th International Symposium on New Technology for Urban Safety of Mega Cities in Asia (USMCA)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04388
[Presentation] A Study on the Effect of Diagonal Cracks Opening on the Failure Behavior of RC Beam-column Join with Mechanical Anchorage by 3D RBSM2016
- Author(s)
  Kohei NAGAI
- Organizer
  9th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-9)
- Place of Presentation
  カリフォルニア，アメリカ
- Year and Date
  2016-05-30
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04388
[Presentation] A Survey of Social Support Networks in a Depopulating Japanese Village2012
- Author(s)
  Yagi, U., Nagai, K., Suzuki, N. and Matous, P.
- Organizer
  The 8th International Symposium on Social Management Systems SSMS2012 - Disaster Prevention and Reconstruction Management
- Place of Presentation
  Kaohsiung, Taiwan
- Year and Date
  2012-05-02
- Data Source
  KAKENHI-PROJECT-23760568
[Presentation] An Analytical Investigationof Anchorage Performance of Mechanical Anchorage by 3D Discrete Model2012
- Author(s)
  長井宏平
- Organizer
  The 4th Asia-Pacific Young Researchers &Graduates Symposium
- Place of Presentation
  香港,中国
- Year and Date
  2012-12-05
- Data Source
  KAKENHI-PROJECT-23656278
[Presentation] Role of Coarse Aggregate in a Cement-based Material withStrain-hardening Subjected to Stress-field Rotation2011
- Author(s)
  長井宏平
- Organizer
  10th International Symposium on New Technology for Urban Safety of Mega Cities in Asia(USMCA)
- Place of Presentation
  チェンマイ(タイ)
- Year and Date
  2011-10-13
- Data Source
  KAKENHI-PROJECT-22686042
[Presentation] Role of Coarse Aggregate in a Cement-based Material with Strain-hardening Subjected to Stress-field Rotation2011
- Author(s)
  Kohei NAGAI, Benny SURYANTO, Koichi MAEKAWA
- Organizer
  10th International Symposium on New Technology for Urban Safety of Mega Cities in Asia (USMCA)
- Place of Presentation
  チェンマイ(タイ)
- Year and Date
  2011-10-13
- Data Source
  KAKENHI-PROJECT-22686042
[Presentation] Numerical Simulation of Damaged HPFRCC Plates with Multi-directional Cracking2010
- Author(s)
  Kohei NAGAI
- Organizer
  2nd International Conference on Durability of Concrete Structures
- Place of Presentation
  Sapporo, Japan
- Data Source
  KAKENHI-PROJECT-20246073
[Presentation] Numerical Simulation of Damaged HPFRCC Plates with Multi-directional Cracking2010
- Author(s)
  Kohei NAGAI, Benny SURYANTO, Koichi MAEKAWA
- Organizer
  2nd International Conference on Durability of Concrete Structures (ICDCS2010)
- Place of Presentation
  札幌
- Year and Date
  2010-11-25
- Data Source
  KAKENHI-PROJECT-22686042
[Presentation] Numerical Simulation of Damaged HPFRCC Plates with Multi-directional Cracking2010
- Author(s)
  Kohei NAGAI
- Organizer
  2nd International Conference on Durability of Concrete Structures
- Place of Presentation
  Sapporo, Japan 北海道大学
- Data Source
  KAKENHI-PROJECT-20246073
[Presentation] Numerical Simulation of Damaged HPFRCC Plates with Multi-directional Cracking2010
- Author(s)
  長井宏平
- Organizer
  2nd International Conference on Durability of Concrete Structures(ICDCS2010)
- Place of Presentation
  札幌
- Year and Date
  2010-11-25
- Data Source
  KAKENHI-PROJECT-22686042
[Presentation] Static and Fatigue Failure Simulation of Concrete Material by Discrete Analysis2010
- Author(s)
  Kohei NAGAI
- Organizer
  7th International Conference on Fracture Mechanics of Concrete and Concrete Structure (FraMCos-7)
- Place of Presentation
  Jeju, Korea
- Data Source
  KAKENHI-PROJECT-20246073
[Presentation] 二方向ひび割れを有するHPFRCCの空間平均化構成モデルの構築2008
- Author(s)
  長井宏平
- Organizer
  コンクリート工学年次大会
- Place of Presentation
  福岡
- Data Source
  KAKENHI-PROJECT-20760299

1. MAEKAWA Koichi (80157122)

# of Collaborated Projects: 3 results

# of Collaborated Products: 10 results
2. Asamoto Shingo (50436333)

# of Collaborated Projects: 3 results

# of Collaborated Products: 7 results
3. ISHIDA Tetsuya (60312972)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
4. 酒井雄也 (40624531)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
5. 松本浩嗣 (10573660)

# of Collaborated Projects: 2 results

# of Collaborated Products: 1 results
6. JIANG CHENG

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
7. NAKARAI Kenichiro (10359656)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
8. SUZUKI Naofumi (80456144)

# of Collaborated Projects: 1 results

# of Collaborated Products: 2 results
9. MATOUS Petr (70508192)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
10. FUJIYAMA Chikako (60613495)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
11. 内村太郎 (60292885)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
12. 長山智則 (80451798)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
13. 千々和伸浩 (80546242)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
14. 蔵重勲 (20371461)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
15. 全邦釘 (60605955)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
16. 鎌田知久 (70804194)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
17. 金澤健 (80823773)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
18. 高橋恵輔 (00972126)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
19. 宮本慎太郎 (60709723)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
20. EDDY LIYANTO

# of Collaborated Projects: 1 results

# of Collaborated Products: 21 results
21. WANG YI

# of Collaborated Projects: 1 results

# of Collaborated Products: 6 results
22. QIU MINGHONG

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
23. MOTOUS Petr

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results

NAGAI Kohei 長井 宏平

Research Projects

Research Products

Co-Researchers

UHPCにより補強された腐食劣化RC構造のRBSM解析による性能評価Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

高炉セメントコンクリートのひび割れ要件解明と水和物形態に基づく収縮抑制手法の開発

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

深層学習を実装した微細構造解析による鉄筋コンクリート内部損傷の逆推定と性能評価Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Development of mesoscale simulation system for evaluating the performance of repaired RC structuresPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

腐食劣化したRC構造のFRP補強効果のRBSM微細構造解析による性能評価Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Estimation of Bridge Construction Year System Using Satellite Landsat Data and AI AnalysisPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

腐食劣化したRC構造のFRP補強効果のRBSM微細構造解析による性能評価Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Estimation and risk assessment of rebar corrosion distribution inside RC using mesoscale analysis and AI image analysisPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Estimation of internal corrosion degree of reinforcement in concrete using 3D meso-scale simulationPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

化学的分析に基づいたコンクリート構造物の補修材付着性状のモデル化と構造性能評価Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Study on interface variation between different materials in concrete depending on temperature history during hardening and its association with durability

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Evaluation of residual structural performance of damaged bridge members by three dimensional meso scale analysis and its retrofitPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

アジア域の劣化したＲＣ構造物の残存性能評価と補修のための大規模数値解析Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

NAGAI Kohei 長井宏平