| Title |
A Study on the Determination of the Optimal Parameter for the Evaluation of the Effective Prestress Force on the Bonded Tendon |
| Keywords |
bonded tendon;effective prestress force;SI technique;natural frequency;displacement;부착식 텐던;유효 긴장력;SI 기법;고유진동수;변위 |
| Abstract |
The bonded tendon was adopted to the reactor building of some operating nuclear power plants in Korea and the assessment of the effective prestress force on the bonded tendon is being issued as an important pending problem for continuous operation beyond their design life. The sensitivity analysis of various parameters was carried out to evaluate the effective prestress force using the system identification technique and the optimal parameters were determined for SI technique in this study. The 1/5 scaled post-tensioned concrete beams with the bonded tendon type were manufactured and in order to investigate the relationship of the natural frequency and the displacement to the effective prestress force, impact test, SIMO sine sweep test and bending test using the optical fiber sensor and the compact displacement transducer were carried out. As a result of tests, both the natural frequency and the displacement show the good relationship with the effective prestress force and both parameters are available for the SI technique to estimate the effective prestress force. |