earticle

영어

The research on the effect of the prestressing force on the frequency of PSC(Prestressed Concrete beam) has been conducted theoretical1y and experimentally, and a few theory has been presented. However, the presented theories show no agreement in predicting the effect of the prestressing force. ln this paper, the theories on the effect of the prestressing force on the frequency of PSC beam are presented and evaluated using the experimental result. To obtain the experimental result, two PSC beam specimens were manufactured, and the modal test and analysis were performed. The modal analysis results revealed that th앙 prestressing force increased the natural frequency of the PSC beam. Comparing predicted results using existing theories show that Kim' s model, which substitutes the prestressing tendon with the equivalent beam, gives the best prediction result.