Performance evaluation of corroded prestressed concrete structures by digital twin technology

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K20443
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0303:Civil engineering, social systems engineering, safety engineering, disaster prevention engineering, and related fields
• Research Institution: The University of Tokyo
• Principal Investigator: Kurihara Ryota 東京大学, 大学院工学系研究科(工学部), 助教 (60964640)
• Project Period (FY): 2022-08-31 – 2024-03-31
• Keywords: プレストレストコンクリート / PC鋼材 / 破断 / 再定着 / より線 / デジタルツイン

Outline of Final Research Achievements

The objectives of this study are to advance numerical analysis methods for the residual structural performance of existing prestressed concrete (PC) structures with corroded PC tendon, and to make a scheme of maintenace based on an utilozation ofconbinated information of on-site inspection and numerical analysis through digital twin technology. The main issues are the tracking of non-uniform stress conditions such as localized corrosion and rupture, and simplification for full-scale application. Through modeling of steel slip behavior at steel rupture based on a new experiment method, member-scale analysis, and full-scale analysis, A maintenance management scheme based on the performance evaluation of corroded PC structures by numerical analysis was developed.

Free Research Field

数値解析、構造性能評価

Academic Significance and Societal Importance of the Research Achievements

劣化した既設PC構造物をありのままに再現したモデルを用いた数値解析により、様々なシナリオや補修・補強の効果を定量的に評価できる。適切な補修・補強工法を選択することができるのみならず、重点的に点検すべき箇所の絞り込みや点検手法の効率化により既設PC構造物のメンテナンスコストの削減に資する。