The object of this study is to investigate the confined effects of specimens using GFRP(glass fiber reinforced polymer) sheet and PET(polyethylene terephthalate) sheet. Since GFRP and PET sheet have a grate deformation capacity, the brittle failure of concrete can be avoid. A total of specimens is sixteen and major variables are the type of strengthen material and strengthening layer. As a result of test, specimens reinforced with a glass fiber sheet compare to the standard specimen have a significant increase both strength and ductility. Ductile of the specimens reinforced with PET is superior to it of the GFRP regardless of strengthening layer. However, in the strength effect aspect is not great compare to the ductile. Resultingly, it is judged that the reinforced method with PET is available to apply field application.

• 전혜민(강남대학교 건축공학과 3학년) | Hye-Min Jeon
• 하상수(강남대학교 건축공학과 부교수, 공학박사) | Sang-Su Ha
• 김소영(한경대학교 건축학부 대학원 석사과정) | So-Young Kim
• 최동욱(한경대학교 건축학부 건축공학전공 교수, 공학박사) | Donguk Choi