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2차원 모형을 이용한 수리해석(II) : 배수위 흐름해석

Hydraulic Analysis Using a Two-Dimensional Model(II) : Bridge Backwater Analysis

  • 김응석 (선문대학교 건축사회환경학부) ;
  • 이승현 (선문대학교 건축사회환경학부)
  • Kim, Eung-seok (Department of Architecture, Architectural Eng. & Civil Eng., Sunmoon University) ;
  • Lee, Seung-hyun (Department of Architecture, Architectural Eng. & Civil Eng., Sunmoon University)
  • 투고 : 2015.04.03
  • 심사 : 2015.08.06
  • 발행 : 2015.08.31

초록

본 연구는 연구(I)의 교각의 기하학적 형태에 따른 수리특성을 바탕으로 배수위 영향구간을 분석하고자 2차원 모형(RMA-2)과 1차원 모형(HEC-RAS)을 적용하였다. 교각형상은 교각 설치전을 포함하여 총 6개(사각형, 마름모, 팔각형, 타원형, 원형)로 구분하였으며 배수위 영향구간 분석결과 HEC-RAS의 경우 배수위 영향구간이 약 150m~200m, RMA-2모형의 경우 모든 교각형상에서 약 50m의 배수위 영향구간을 보였다. RMA-2모형의 결과는 HEC-RAS의 결과와 직접적인 비교에는 어려움이 있었으나 타원형의 수리특성이 설치전과 유사한 결과를 보이고 있어 교각 설치시 타원형이 가장 안정적인 교각이라 판단되며, 향후 신설교량설치 및 교각형상 선정시 도움을 줄 수 있을 것으로 판단된다.

This study has analyzed the backwater effect by the bridge pier on the basis of the result on hydraulic characteristics with pier shapes in study(I), using a two-dimensional model(RMA-2) and an one-dimensional model(HEC-RAS). The pier shapes are classified into total six types such as square, rhombus, octagon, oval, round, and no-piers. The result of the backwater effect analysis showed that the backwater length is about 150 and 50m from HEC-RAS and RMA-2, respectively for all pier types. Although it is difficult to directly compare between results from the two models, the oval shape pier has shown similar results to the no-pier situation before the bridge construction in hydraulic characteristics. This analysis can help to select pier types in the new bridge construction for the future.

키워드

참고문헌

  1. Cha, Y.K., Kim, Y.H., Lee, M.S., Analysis of Water Surface Level Variation due to Piers in a Curved Channel, Journal of the New Material Technology, Vol.9, pp.41-53.2000.
  2. Kim, Y.H., Computation of Backwater due to Piers in Bend of Mobile Bed Channels, Kyung Bok College, Vol.4, pp.579-600.2000.
  3. Koh, S.H., Yoon, B.M., Yu, K.K. Evaluation of Water-Surface Rising due to Bridge Piers by using RMA-2 Model, Korean Society of Civil Engineers, Vol. 2005, No. 10, pp.238-241.2005.
  4. Kim, C.h., Yoon, B.m., Yu, K.k. An Experimental Study on the Backwater Effect due to Bridge Piers, 2006 Korean Society of Civil Engineers, Vol. 2006, No. 10, pp.2654-2657.2006.
  5. Shin, K.S., Jeong, S.M., Lee, J.H., Song, P. Flow Characteristics and Riverbed Changes Simulation for the Upstream and Downstream Sections of Gongju Bridge, Korean Society of Hazard Mitigation, Vol. 8, No. 2, pp.119-127.2008.
  6. USACE-HEC, Hydrologic Modeling HEC-RAS User's Manual, 2006.
  7. Kim, Y.H., Influent of Flood Stage by Dragon Teeth Constructed in Rivers, Kyung Bok College, pp.155-174.2001

피인용 문헌

  1. Verification of water environment monitoring network representativeness under estuary backwater effects vol.190, pp.8, 2018, https://doi.org/10.1007/s10661-018-6849-2
  2. Verification of Water Environment Network Representative at the Baekcheon Junction of the Nakdong River vol.27, pp.6, 2018, https://doi.org/10.5322/JESI.2018.27.6.371