Bridge natural frequency estimation by extracting the common vibration components from vehicles

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630193
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: The University of Tokyo
• Principal Investigator: NAGAYAMA tomonori 東京大学, 工学(系)研究科(研究院), 准教授 (80451798)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 橋梁固有振動数 / 同期計測 / 車両 / 加速度 / GPS

Outline of Final Research Achievements

Understanding on the actual behavior and the performance of bridges are expected to improve the safety and reduce the construction/management cost by eliminating uncertainty in the design and management process. Bridge natural frequencies have been widely used in understanding the dynamic behavior of bridges. However, identification of natural frequencies of numerous bridges require time and cost; such a fundamental property as natural frequency has not been acquired for the majority of bridges. In this research, multiple vehicles are installed with accelerometers and GPS so that the vehicles' dynamic motions are captured in a synchronous manner. Common vibration components are extracted to identify the natural frequencies of bridges. The identification capability has been demonstrated on a steel girder bridge.

Free Research Field

構造物および車両の動力学，モニタリング