Conducting vibration measurements of stiffened aqueduct bridges using a small accelerometer which is easy to handle in the field, the results have been analyzed in comparison with the natural vibration analysis of beam models. The vibration characteristics obtained from the field measurements are fundamental information at the time of the design of the stiffened aqueducts, and can be used as basic information during inspections. The method of measuring by moving one small accelerometer can be used for periodic inspection of aqueduct bridges.
