構造物調査・診断(3)／振動

[V-674] Investigation of physical properties of multispan reinforced concrete girder bridge damaged by aging and evaluation by vibration measurement

〇Kazuhiro Emi¹, Shinichiro Mori¹ (1.Ehime University)

Keywords:Bridge, Vibration measurement, Numerical analysis

In this study, the impact vibration measurement, ultrasonic measurement, and rebound hammer test were performed on a multi-span reinforced concrete (RC) girder bridge constructed in 1930 in order to evaluate the difference in natural frequency and physical properties depending on the span. Was performed. Using a 3D-FEM, the eigenmode and eigenfrequency were obtained, and the analysis and measured values were compared to illustrate the effectiveness of the impact vibration test method. A high correlation was found between the primary natural frequency of each span and the average P-wave velocity measured. The measured primary natural frequency was 3% different from the result of the 3D-FEM model.