Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Effect of Seismic Load on Residential RC Buildings under Construction Considering Construction Period

시공기간을 고려한 주거용 철근콘크리트 건물의 시공 중 지진하중 영향 분석

  • Choi, Seong-Hyeon (Department of Architectural Engineering, Kwangwoon University) ;
  • Kim, Jea-Yo (Department of Architectural Engineering, Kwangwoon University)
  • 최성현 (광운대학교 건축공학과) ;
  • 김재요 (광운대학교 건축공학과)
  • Received : 2022.07.08
  • Accepted : 2022.07.19
  • Published : 2022.08.31
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Abstract

Compared with buildings that have already been constructed, buildings under construction may be more vulnerable to such natural disasters as earthquakes because the concrete strength is not yet sufficient. Currently, Korean design standards present minimum performance targets for each seismic grade of buildings, but the seismic load for design is based on a return period of 2400 years. However, because the construction period of the building is much shorter than the period of use of the building, the application of the earthquake return period of 2400 years to buildings under construction may be excessive. Therefore, in this study, a construction stage model of buildings with 5, 15, 25, and 60 floors was created to analyze earthquake loads during construction of residential reinforced concrete (RC) buildings. The structural stability was confirmed by applying reduced seismic loads according to the return period. As a result, the structural stability was checked for an earthquake of the return period selected according to the construction period, and the earthquake return period that can secure structural safety according to the size of the building was confirmed.

시공 중인 건물은 시공이 완료된 건물과는 다르게 콘크리트의 강도발현이 충분히 이루어지지 않았기 때문에 지진과 같은 자연재해에 더 취약한 모습을 가질 수 있다. 현재 국내 기준은 건축물의 내진등급별 최소성능 목표를 제시하고 있지만, 설계를 위한 지진하중은 재현주기 2,400년의 지진위험도를 기반으로 한다. 하지만 건물의 시공기간은 건물의 사용기간보다 훨씬 짧기 때문에 재현주기 2,400년의 지진을 시공 중인 건물에 적용하는 것은 과도하다. 따라서 이 연구는 주거용으로 사용되는 철근콘크리트 건물의 시공 중 지진하중을 분석하기 위해 5층, 15층, 25층, 60층 건물의 시공단계모델을 작성하고 재현주기에 따라 저감한 지진하중을 적용하여 구조적 안정성을 확인하였다. 그 결과, 시공기간에 따라 선정한 재현주기의 지진을 적용할 때 구조적 안정성을 확인하였으며, 건물의 규모의 따라 구조적 안전성을 확보할 수 있는 지진재현주기를 확인하였다.

Keywords

Acknowledgement

본 연구는 정부(과학기술정보통신부)의 재원에 의한 한국연구재단의 지원(NRF-2019R1A2C1011667)과 2022년 광운대학교 우수연구자 지원 사업에 의해 수행된 연구입니다.

References

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