After an earthquake occurred in the Gyeongju, 2016, many low-story buildings have been questioned in terms of the seismic performance since mostly they have been exempted from the seismic design requirement since 1988. In this study, a 3-story moment resisting frame (MRF) building was analyzed and evaluated the seismic performance. Due to the insufficient seismic performance required for the seismic performance levels, three different seismic retrofit schemes were proposed and their seismic performances were re-evaluated. While steel brace and open shear wall retrofit systems mainly focused on the strength retrofit, the VES damper retrofit system is mainly to enhance the energy dissipation capacity of the system and resultes in the increased ductility. The original building and 3 retrofitted buildings were evaluated using the nonlinear static and nonlinear dynamic analyses and suggestions were proposed. Through the analysis of nonlinear time history and push-over using MIDAS/Gen program, damages of the building in terms of top story and average story drift and effect of reinforcement were analyzed.

1. 서 론
 2. 대상 건축물의 개요
 3. 구조물 내진보강 방법의 개요와 특성
  3.1 Steel Brace를 이용한 내진보강
  3.2 Open Shear Wall을 이용한 내진보강
  3.3 VES Damper를 이용한 내진보강
  3.4 보강 개소 산정
 4. 내진 성능 평가 및 해석절차
  4.1 예비평가
  4.2 비선형 정적 해석
  4.3 비선형 동적 해석
 5. 결 론
 / REFERENCES /

• 송민아(세종대학교 건축공학과) | Song Min Ah Corresponding author
• 이시철(세종대학교 건축공학과) | Lee Sicheol
• 이기학(세종대학교 건축공학과) | Lee Kihak