Development of load estimation and life time prediction method for highway bridge deck RC and PC slabs

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02223
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 22010:Civil engineering material, execution and construction management-related
• Research Institution: Waseda University
• Principal Investigator: Sato Yasuhiko 早稲田大学, 理工学術院, 教授 (60261327)
• Co-Investigator(Kenkyū-buntansha): 高橋 良輔 秋田大学, 理工学研究科, 准教授 (10371783)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: コンクリート床版 / 疲労 / 寿命 / 性能

Outline of Final Research Achievements

Load and performance evaluation techniques have been developed for road bridge slabs, which are replacement members in bridge system. The techniques developed contribute to create seamless system from design to maintenance. In this study, AI-based truck load prediction method for domestic vehicles, fatigue life prediction method for RC, PC and joints based on a life prediction formula for the compression-fatigue failure mode using a shear strength reduction line, a method for measuring in-plane displacement of the deck slab using an SLR camera and post-processing analysis software, and a method for evaluating the degree of damage based on the in-plain deformation.

Free Research Field

コンクリート工学

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的な意義は，コンクリート構造物の中で最も過酷な状況に置かれている道路橋床版の長寿命化という目標の達成を，超耐久材料の開発でも高度な点検技術の開発でもなく，設計と維持管理の壁を無くしたシームレスな照査により可能とする点にある．
本研究の社会的意義は，実務への導入が可能なレベルまで各種技術を作り込むものであり，これからのコンクリート構造物の設計，施工，維持管理の在り方を大きく変える可能性がある点にある．