2023 年 64 巻 2 号 p. 115-120
The aim of this study is to enable monitoring of structural performance conditions of concrete girders. We first developed a method to restore displacement waveforms using acceleration waveforms from passing trains by utilizing the linear vibration theory. Numerical experiments have shown that the method can estimate the maximum displacement within an error margin of approximately 5%. Furthermore, the equivalent linearized beam theory was extended to estimate reinforcing bar stress waveforms using the displacement waveform. These methods realized the structural performance evaluation of bridges such as riding comfort and fatigue fracture from acceleration measurements.
