Natural Frequencies of Model Piers under Different Ground Support Conditions

The natural frequency is critical for evaluating the integrity of bridge piers. However, piers can vary with support condition ground. aim this study to investigate under different ground conditions and at embedded depths using a small-scale concrete pier. model were fixed asphalt pavement epoxy simulate rock site condition. Furthermore, installed in soil chamber dimensions 1.0 m × 0.5 weathered conditions. upper part pier was hit hammer having rubber tip, acceleration signals measured three accelerometers upper, middle, bottom parts Fast Fourier transforms performed analyze frequencies experimental results showed that significantly higher than unfixed In case conditions, peak points appeared domain. these increased depth. increment ratio largest amplitude significant. This demonstrates should be considered when through analysis.