| Title |
Estimation of Prestressed Tension on Grouted PSC Tendon Using Measured Elastic Wave Velocity |
| Authors |
김병화(Kim, Byeong Hwa) ; 장정범(Jang, Jung Bum) ; 이홍표(Lee, Hong Pyo) ; 이일근(Lee, Il Keun) |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.5A.289 |
| Keywords |
텐던;장력;종진동;프리스트레스;콘크리트;탄성파속도 tendon;tension;axial vibration;prestress;concrete;elastic wave velocity |
| Abstract |
This study proposes an experimental formula that can estimate the applied tensile stress of a bonded PSC by measuring a longitudinal stress wave velocity of tendon. To develop practical formula, the various bonded PSC specimens are constructed with different levels of prestresses. For all the bonded PSC specimens, the longitudinal impact-echo tests are repeated with various experimental conditions. Considering a few influence factors such as temperature, length and the number of strands, the application of the law of similarity results in a nondemensional experimental formula that could estimate existing tensile stress on tendon by measuring its longitudinal stress wave velocity. Next, a feasibility study of proposed approach has been conducted for a real reactor building containment. The estimated stress levels of two vertical tendons embedded in the nuclear plant are close to their design values. |