Development of vibration monitoring of bridges for before- and after-earthquake disasters

2015 Fiscal Year Final Research Report

• Project/Area Number: 25249062
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Yokohama National University
• Principal Investigator: FUJINO YOZO 横浜国立大学, 先端科学高等研究院, 教授 (20111560)
• Co-Investigator(Kenkyū-buntansha): MIZUTANI Tsukasa 東京大学, 工学系研究科, 助教 (10636632)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: モニタリング / 構造同定 / 損傷同定 / 非線形応答解析 / 橋梁 / 高架橋

Outline of Final Research Achievements

Usefulness of monitoring of bridges is demonstrated through a few examples. The first one is a detailed response analysis of Yokohama Bay Bridge under 2011.3.11 main shock and aftershocks. It was found that the pounding took place between the wind shoe and the girder. An analytical model that explains the pounding quantitatively was constructed and using that model, the seismic response was simulated. The result indicated that the pounding may break the wind shoe if the seismic excitation is of L2 ground motion level. The second one is the detailed response analysis of dynamic response monitoring of PRC girders or even larger high-speed train viaducts of Hokuriku Line. The cause of large vibration under train passage was clarified and its remedies were suggested. Real-time identification techniques of earthquake-induced damage to RC bridge piers using dynamic responses was also investigated.

Free Research Field

構造工学