In general, the pretensioned PSC members are manufactured at the factory and are transported to the site. Due to road conditions, their sizes are limited. Therefore, until now pretensioning method is only applied to small PSC members. In order to produce large scale PSC members using pretensioning method, they shall be made on site. In this study, a portable prestressing device to produce pretensioning PSC girders on site has been developed. The portable prestressing device should be safe and stable about jacking force. In this paper, the portable prestressing device to produce 10m-span pretensioning PSC girders was made. The static loading test was performed to analyze the resisting mechanism of each component of that device. The jacking force was introduced by stretching and anchoring the tendons at its both ends. In the static loading test, the structural characteristics of the developed device are investigated.

ABSTRACT
 1. 서 론
 2. 이동식 긴장대
 3. 실험 계획
  3.1 실험체의 제원 및 구성
 4. 실험 방법
  4.1 측정위치
 5. 실험 결과
  5.1 하중재하단계에 따른 응력분포
  5.2 하중 재하단계에 따른 변위
 6. 결론
 References

• 이규세(선문대학교 토목공학과) | Yi Gyu-Sei