유사동적실험에 의한 프리캐스트 보강블럭벽 공법을 적용한 비내진상세를 가지는 실물 2층 R/C 골조의 내진성능 평가

초록

This study proposes a new concept called Precast Reinforced Block Wall (PRBW), which improves and complements the drawbacks of existing strength enhancement seismic reinforcement methods. The PRBW seismic reinforcement method allows residents to continue residing in buildings while seismic reinforcement construction is underway. It minimizes the increase in building weight due to reinforcement and exhibits excellent joint constructability. Especially suitable for R/C buildings with typical strength-enhancing seismic reinforcement requirements, which typically exhibit non-seismic details dominated by shear failure, PRBW serves as an easily implementable seismic reinforcement method. Using a physical two-story R/C frame specimen based on existing non-seismic R/C buildings, pseudo-dynamic experiments were conducted to verify restorability, stiffness enhancement, and seismic response displacement control capability of the externally attached PRBW reinforcement system. The research findings indicated that under Korea’s Design Basis Earthquake (DBE) level of 200 cm/s², the unreinforced R/C frame experienced shear failure, while the frame reinforced with PRBW seismic reinforcement suffered minor seismic damage. Even under the maximum considered earthquake (MCE) of 300 cm/s², only moderate seismic damage was expected. This study successfully validated the effectiveness of the newly developed PRBW seismic reinforcement method.

키워드