An Experimental Study on Damage Detection of PSC Beams using Vibration Test

진동 시험을 통한 PSC 보의 손상탐지에 대한 실험적 연구

PSC bridges are deteriorated by many reasons and are difficult to measure residual prestressing forces. It is considered that one of the methods for measuring the prestressing forces is vibration test. This study reports on the change of natural frequency for damaged PSC beams using vibration test which have been carried out to evaluate the effects of cross-section and prestressing forces on natural frequency of PSC beams. According to the results of vibration test results, natural frequency is more sensitive to the changes of cross-section than those of prestress.