유사동적실험에 의한 NISF 내부접합공법으로 내진보강 된 철근콘크리트 2층 골조의 내진성능 평가

초록

A Novel Internal Steel Frame (NISF) method was suggested for seismic retrofitting of existing reinforced concrete (R/C) buildings. The developed system is categorized as a strength increasing technique that can easily enhance the horizontal strength of R/C structures. Two-story R/C frame specimens were designed based on an Korean R/C frame without seismic details. A control specimen and a specimen strengthened with the NISF internal system were used. Pseudo-dynamic testing was carried out to estimate the effects of seismic retrofitting in terms of the ultimate response strength, response displacement, and degree of earthquake damage compared with the control specimen. Test results revealed that the proposed NISF retrofitting technique, internally connected to the existing R/C frame, adequately enhanced the lateral-resistant force, resulting in decreased earthquake response displacement of R/C frames under high level of earthquake ground motions.

키워드