土木分野におけるセンサ技術の利用と可能性(1)

[CS9-05] Measuring System of Natural Frequencies of Bridge Piers Using Acceleration Sensor

〇Katsuhiro Yujiri¹, Taiki Kato¹ (1.Kozobutsusekkei)

Keywords:three-dimensional acceleration sensor, railway bridge pier, natural frequency, dominant period, free vibration range

Three-dimensional acceleration sensor is used to measure the vibration waveform of the railway bridge pier due to the train load. Then the changes of dominant frequencies during running and after running of train on the target pier are examined. In order to calculate the natural frequency of the bridge pier due to the train load, it is necessary to appropriately divide the change of vibration waveform and determine the free vibration range.