In this study, effectiveness of seismic retrofitting methods using passive damping devices was investigated through numerical analyses of short-period structures under earthquakes which have short-duration and high-frequency impulse characteristics similar to Geyongju earthquakes. Displacement spectra of elastic systems and ductility demand of inelastic systems were evaluated by increasing viscous or friction damping. The damping devices could reduce responses of the structures with shorter structural period than 0.2s. The earthquakes similar to impulse load did not induce the responses of the structures with longer period than 0.4s, and the effects of the damping devices which generates damping forces proportional to structural responses became insignificant.

1. 서 론
 2. 응답스펙트럼 추정 모델
  2.1 적분에너지제한(Integral Energy Bound, IEB) 컨벡스(Convex)모델
  2.2 퓨리에 모델(Fourier-envelope bound convex model, FEBmodel)
  2.3 확률론 모델(Probabilistic model, PRB model)
  2.4 Newmark and Hall 설계 스펙트럼
  2.5 지반입력신호 계수
  2.6 경주지진 가속도 응답스펙트럼 및 모델 비교 평가
 3. 감쇠장치를 사용한 내진성능보강
  3.1 점성 감쇠장치
  4.2 마찰형 감쇠장치
 4. 결 론
 / REFERENCES /

• 노지은(단국대학교 건축공학과) | Roh Ji Eun
• 이상현(단국대학교 건축공학과) | Lee Sang Hyun Corresponding author
• 서준원(단국대학교 건축공학과) | Seo Jun Won