Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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The Optimal Isolation Period of Vertically Story-added Remodeling Apartment Building with Seismic Isolation System

면진시스템을 적용한 수직증축 리모델링 공동주택의 최적 면진주기 산정

  • Received : 2018.12.11
  • Accepted : 2019.02.22
  • Published : 2019.05.01
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Abstract

This study presents the optimal isolation period according to the number of vertically expended stories in order to provide the basic data for the application of the seismic isolation system in the vertically expended remodeling of the aged apartment. As a result of the structural analysis, the isolation period should be at least twice the primary structure in three-story vertical expansion, three times in two-story expansion, and four times in one-story expansion for the effective application of the isolation system. On the basis of the result, the efficacy of an isolation system for the actual apartment structure, which is three-story vertically expended, was analytically verified. The maximal acceleration response on the top floor reduced by 70% and 65% of the non-isolated structure in the X and Y directions respectively. Additionally, the base shear force decreased by 30% in the both directions, compared to the non-isolated structure.

본 연구에서는 노후화된 공동주택 수직 증축 리모델링 시 면진시스템의 적용성을 검토 및 면진시스템 적용을 위한 기초자료를 제공할 목적으로 동일한 구조로 수직 증축 시 수직 층수와 면진주기에 따른 최적 면진주기를 산정하였다. 해석결과, 3개층 수직 증축 시에는 면진주기를 비면진 건물 주기의 2배 이상, 2개층 수직 증축 시에는 비면진 건물 주기의 3배 이상을 확보하여야만 충분한 면진효과를 나타내는 것을 알 수 있었다. 또한, 1개층 수직 증축 시에는 비면진 건물 주기의 4배 이상을 확보하여야만 면진효과를 나타내었다. 위의 결과를 활용하여 3개층 수직증축 리모델링 대상 공동주택에 면진시스템을 적용하여 그 효과를 검증하였다. 최상층 최대응답가속도가 비면진 건물의 최대응답가속도 보다 X방향의 경우에는 약 70%로, Y방향의 경우에는 약 65%의 감소를 나타내었다. 또한, 밑면 전단력의 경우, 비면진 건물과 비교하여 X방향 및 Y방향 모두 약 30% 감소하는 것으로 나타났다.

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