The flexural behavior of reinforced concrete (RC) beams strengthened with an iron based-shape memory alloys strip(Fe-SMAs) by a near-surface mounted (NSM) method was evaluated. The pre-strained values of 0% and 4% and introduced prestressing force by an activation of a shape memory effect of the Fe-SMA strengthening material were considered as experimental variables. The experimental results show a large increase in initial stiffness of beams reinforced with 4% pre-strain. On the contrary, The effect of prestressing seems to be insignificant on the yielding and ultimate loads of tensile bars.

Abstract
 1. 서 론
 2. 실험계획 및 방법
 3. 실험결과 및 고찰
 4. 결 론
 참고문헌

• 홍기남(충북대학교 토목공학과) | Hong Ki Nam
• 강판승(충북대학교 토목공학과) | Kang Pan Seung
• 연영모(㈜비엠텍, 연구개발부) | Yoen Yeong Mo
• 박재규(㈜비엠텍, 연구개발부) | Park Jae Kyu