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

Research Project

Project/Area Number 19H02210
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22010:Civil engineering material, execution and construction management-related
Research InstitutionThe University of Tokyo

Principal Investigator

Nagai Kohei  東京大学, 生産技術研究所, 准教授 (00451790)

Co-Investigator(Kenkyū-buntansha) 酒井 雄也  東京大学, 生産技術研究所, 准教授 (40624531)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2019: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Keywordsコンクリート / 腐食 / 微細構造解析 / 内部推定 / 鉄筋腐食 / ひび割れ進展 / 力学相互作用 / 鉄筋コンクリート / 内部腐食分布推定 / 腐食パターン / コンクリートひび割れ / 離散解析手法 / RC構造 / 腐食劣化 / 画像分析 / AI
Outline of Research at the Start

腐食により損傷した鉄筋コンクリート部材の表面のひび割れ情報からの内部鉄筋の腐食分布の推定を,これまでに開発した三次元微細構造離散解析システムを拡張することで可能とし,AI等を活用した損傷の詳細画像データ分析結果を用いることで,実構造物の腐食分布推定を行い,それに基づく残存構造性能と将来リスク評価を可能にすることが本研究の目的である。

Outline of Final Research Achievements

We have developed a computational approach for estimating the distribution of corrosion along the length of a reinforcing bar from the observed surface crack widths. The approach is based on mesoscale simulations of reinforced concrete, using rigid-body-spring models (RBSM), guided by Model Predictive Control (MPC). It is extended to account for differing (smaller) crack openings, multiple instances of localized corrosion, and added confinement due to the presence of stirrups. Accuracy of the proposed approach is demonstrated through comparisons with laboratory tests of steel corrosion within concrete. The crack distribution observed on the concrete surface is automatically reproduced by optimized application of internal expansion within the mesoscale model, from which the corrosion distribution is estimated. The estimated corrosion distribution is accurate when compared to the measured corrosion of bars removed from the test specimens.

Academic Significance and Societal Importance of the Research Achievements

鉄筋コンクリート構造物の損傷において最も問題になるのは鉄筋の腐食であるが,損傷後の合理的な対策は容易ではない。その主たる原因はコンクリート表面から鉄筋の腐食状況が確認できないことである。内部の腐食の状況が確認できれば,その腐食程度に応じて耐力等の構造性能を推定することができ,対策の要否や方法を合理的に検討することが可能になる。本研究は,表面ひび割れから内部腐食を逆推定する数値解析プログラムを逆推定するものであり,これを発展させ実構造物に適用できれば,推定した腐食状況に基づく合理的な維持管理に貢献できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (20 results)

All 2022 2021 2020 2019

All Journal Article (14 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 14 results,  Open Access: 4 results) Presentation (6 results) (of which Int'l Joint Research: 6 results)

  • [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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [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

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [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

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [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

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [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

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [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)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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