| Title |
Longitudinal Vibration Mechanism of Grouted PSC Tendon |
| Keywords |
tendon;tension;axial vibration;prestressed concrete;elastic wave velocity;텐던;장력;종진동;프리스트레스 콘크리트;탄성파속도 |
| Abstract |
This study reveals the longitudinal vibration mechanism of tendon embedded in a prestressed concrete. The extensional and torsional displacements of the strand are coupled, and the applied prestress level of tendon affects not only axial rigidity but also torsional rigidity. Measuring the elastic wave velocity of tendon, the applied prestress level of tendon could be evaluated. This is because the elastic wave velocity is a function of extensional and torsional rigidity. Using the experimental results for the six prsteressed concrete beams with different prestress levels, the longitudinal vibration mechanism and the effect of prestress level have been examined. To estimate the system ridigities of tendon, a system identification algorithm has been newly developed. The estimated system rigidities have been compared with the available results of related previous study. |