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아웃케이블 공법을 적용한 프리스트레싱 도입 철근콘크리트 슬래브의 휨보강 성능
윤현도 ( Yun Hyun-do ),박완신 ( Park Wan-snin ),한병찬 ( Han Byung-chan ),황선경 ( Hwang Sun-kyoung ),임재형 ( Lim Jae-hyung ),문정호 ( Moon Jeong-ho ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.1
A strengthening technique for reinforced concrete beams using external unbonded reinforcement offers advantages in speed and simplicity of installation over other, established, strengthening techniques. The purpose of this paper is to investigate the capabilities of a new retrofitting technique, namely external prestressing, for flexural strengthening of beams. The paper provides a general description of structural behavior of beams strengthened using the technique. The variable in the test program was retrofitting method. It is shown that the technique can provide greater strength enhancement to lightly reinforced sections and that provision of deflectors enhances efficiency.