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A Study on the Seismic Response Formula for Improvement of Seismic Design Code of Water Treatment Underground Structures

수처리 지중구조물의 내진설계 기준 개선을 위한 지진 응답 제안식의 관한 연구

  • Lee, Joung-Bae (Dept. of Transportation System Engineering, Korea National University of Transportation (KECC, Korea Engineering Consultants Corp.)) ;
  • Bae, Sang-Soo (Dept. of Transportation System Engineering, Korea National University of Transportation (KECC, Korea Engineering Consultants Corp.)) ;
  • Chung, Kwang-Mo (Dept. of Water Supply & Sewerage Engineering, Korea Engineering Consultant Corporation) ;
  • Bang, Myung-Seok (Dept. of Transportation System Engineering, Korea National University of Transportation)
  • Received : 2022.04.28
  • Accepted : 2022.09.09
  • Published : 2022.09.30

Abstract

Generally it was known that member forces in the earthquake resistant design is lower than those in the general design. But it is not true in cases of water treatment underground structures, which is different in each case like water treatment plant, sedimentation basin, and utility-pipe conduit. Also, looking at the scale of earthquakes that have recently occurred in Korea, large-scale earthquakes are frequent, so when the magnitude of the design seismic force increases, it is necessary to investigate the seismic behavior of the water treatment underground structure and to deal with it. In this study the change rate of member forces was investigated by the change of design load factor (earthquake acceleration design criteria), earth depth, underground water level. The pseudo-static analysis and response displacement method was applied, and various analyzes were conducted depending on the ground water and soil depth. The proposed formula in this study will be efficient when the earthquake design code of water treatment underground structures is revised.

수처리 지중구조물의 내진설계에서 내진설계 시보다 일반설계의 경우에 부재력 값이 더 크다고 알려져 있다. 그러나 이는 수처리 지중구조물의 종류 즉, 정수지 구조물, 침전지 구조물, 공동구 구조물에 따라서 다르다. 또한 최근 국내에서 발생한 지진의 규모를 보면 대형지진이 빈번하므로 설계지진력의 크기가 커질 때 수처리 지중구조물의 내진거동의 규명 및 대처방안이 필요하다. 본 연구에서는 수처리 지중구조물의 종류별로 하중계수 즉, 설계지진가속도를 일정 비율로 증가시키면서 지중구조물의 지진응답을 분석하고 변화를 나타내는 식을 제안하여 향후 설계기준 개정시에 참조하도록 하였다. 해석은 등가 정적해석법과 응답 변위해석법을 적용하고, 지하수 유무, 토피고에 따라서 다양하게 분석하였다. 본 연구에서 제안된 식은 향후 수처리 지중구조물의 설계기준 개정시에 유용할 것으로 판단된다.

Keywords

References

  1. Chung, K. -M. (2013), "Analytical Study for the Establishment of Standard Requirement in Seismic Design of Water Treatment Underground Structures".
  2. Ministry of Environment (1999), Study for Establishment of Seismic Design Standards for Waterworks Facilities.
  3. Ministry of Environment (2009), Study for Seismic Standards for Sewerage Facilities.
  4. Park, J. -W. (2005), "A Study on Seismic Analysis of Underground Structures Using Response Displacement Method", Kunsan National University, pp.18-28.