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

2차원 모형을 이용한 수리해석(II) : 배수위 흐름해석

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

Abstract

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.

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.

Keywords

References

  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

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