Abstract
Identification of Cause of Displacement-Induced Fatigue in Steel Bridges Based on Displacement Measurements Using High-Performance Micro-electromechanical Systems Sensor
Highlights
ISSN 0914-4935 © MYU K.K.Sensors and Materials, Vol 29, No 2 (2017)bridges has been increasing
It is necessary for bridge monitoring to include maintenance strategies that are appropriate for fatigue damage
The S/N ratio required to calculate the displacement from the acceleration in the frequency range of 0.1–10 Hz was investigated using 10 different accelerometers consisting of nine different micro-electromechanical systems (MEMS) accelerometers and a servo-type accelerometer
Summary
Sekiya et al[15] investigated the S/N ratio required to accurately calculate the displacement from the acceleration at low frequencies below 1.0 Hz, the target frequency range was insufficient to cover the dominant frequency range for bridge displacements under live loads, which falls below 5 Hz. Park et al[6] proposed an initial velocity estimation method that decreases the integration error originating from the error of the initial velocity. It is difficult to accurately measure the response in the low- and high-frequency ranges with accelerometers and strain gauges, respectively Based on the field measurement of a bridge in service, the bridge displacement responses at multiple points were determined using the free vibration method[16] and high-performance MEMS accelerometers.
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