대한토목학회논문집 (KSCE Journal of Civil and Environmental Engineering Research)

  • 제31권2B호
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  • Pages.175-185
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  • 2011
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  • 1015-6348(pISSN)
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  • 2799-9629(eISSN)
대한토목학회 (Korean Society of Civil Engeneers)
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육상구조물군에 작용하는 지진해일파력의 3차원수치해석

Numerical Analysis for Three-Dimensional Tsunami Force Acting on Multi-Onshore Structures

  • 이광호 (나고야대학 대학원 공학연구과 사회기반공학전공) ;
  • 하선욱 (한국해양대학교 대학원 토목환경공학과) ;
  • 이귀섭 (한국해양대학교 대학원 토목환경공학과) ;
  • 김도삼 (한국해양대학교 공과대학 토목공학과)
  • 투고 : 2010.03.26
  • 심사 : 2010.11.18
  • 발행 : 2011.04.30
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초록

본 연구에서는 복수의 육상구조물군에 작용하는 지진해일파력을 Navier-Stokes solver에 기초한 3차원혼상류해석법으로부터 수치적으로 검토하였다. 특히, 육상구조물의 배치형상과 호안에서의 이격거리 등에 따른 지진해일파력의 특성을 수치실험을 통해 조사하였다. 육상구조물군에 작용하는 지진해일파력에 대한 기존의 수리실험결과와 비교 및 분석하여 본 3차원수치해석의 적용성을 검토하였다. 그리고, 육상구조물에 작용하는 지진해일파력의 추정을 위해 정수압적인 방법과 동수압적인 방법을 각각 적용하여 기존실험결과 및 설계기준과의 비교를 통하여 3차원수치해석의 유용성을 검토하였으며, 기존실험결과와 수치해석결과를 동시에 고려하여 동수압적인 추정법에 관한 회귀식을 제안하였다. 이로부터 육상구조물에 작용하는 지진해일 파력의 산정에 관한 본 수치해석의 유용성을 확인할 수 있었다.

This study investigates tsunami force acting on a group of onshore structures numerically by using three-dimensional one-field model for immiscible multi-phase flows, which is based on Navier-Stokes solver. In particular, we studied on the characteristics of tsunami with respect to the arrangement of onshore structures and the distance from seawall trough numerical experiments. For validation of the numerical method used in this study to calculate tsunami force, numerical results for tsunami force on the structures in coastal area are compared with available experimental data. Furthermore, a detail study on the efficiency of the numerical method is performed for the estimation of tsunami force based on the hydrostatic and hydrodynamic methods in which the numerical results are used. The obtained results are compared to the previous experimental one and design criteria. Considering both experimental results and numerical analysis results, semi-empirical formula by regression analysis is proposed. As a result, it was confirmed that the numerical analysis is effective to estimate on tsunami force acting on onshore structures.

키워드

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