NATURAL FREQUENCY EVALUATION BY IMPACT VIBRATION TEST OF DETERIORATION AND REPAIR SINGLY REINFORCED CONCRETE ARCH STRUCTURES

This paper attempted to understand the vibration performance of RC arches under various conditions by impact vibration tests. In addition, we derived an evaluation formula for the vibration performance of arch structures. As a result, it was shown that it is possible to evaluate the natural frequencies of RC arches with deterioration or repair. Furthermore, specimen with many cracks tended to have lower natural frequencies and higher damping coefficients than that without cracks. And it was confirmed that the natural frequencies tend to be high and the damping coefficients tend to be small by the inside pressure hardening method.