Development of fatigue damage detection system for steel bridge using MEMS sensor and piezoelectric element sensor

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K14814
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 22020:Structure engineering and earthquake engineering-related
• Research Institution: Tokyo City University
• Principal Investigator: SEKIYA HIDEHIKO 東京都市大学, 建築都市デザイン学部, 准教授 (60743309)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 維持管理 / 疲労損傷 / 鋼橋 / 圧電素子 / MEMS

Outline of Final Research Achievements

This research was conducted from FY2020 to FY2023 to develop a fatigue damage detection system for steel bridges using piezoelectric sensors, which do not require electric power for the sensor part. The findings showed the possibility of detecting the occurrence and progress of fatigue damage in actual in-service steel bridges under random traffic loads. Furthermore, the applicability of the system to orthotropic steel decks, in which fatigue damages are often found, was investigated, and its practicability was demonstrated.

Free Research Field

維持管理工学

Academic Significance and Societal Importance of the Research Achievements

鋼道路橋に生じる疲労損傷に対する補修補強を必要最小限とし，限られた維持管理費を有効に活用するためには，できるだけ早く疲労損傷を検知することが重要である。本研究では，センサ部に電源を必要としない圧電素子センサを活用したシステムを構築し，そのシステムによって，ランダムな外力が作用する鋼橋における疲労損傷の検知可能性を示した。この研究成果は，鋼橋の維持管理，特に補修補強に対して貢献する研究成果である。