임계 마름 수심기법을 이용한 지하공간 침수 모의 = Inundation Simulation of Underground Space using Critical Dry Depth Scheme

다국어 초록 (Multilingual Abstract)

In this study, a 2D hydrodynamic model equipped with critical dry depth scheme was developed to reproduce the flow over staircase. The channel geometry of hydraulic experiment conducted by Ishigaki et al. was generated in the computational space, and the developed model was validated against flow properties such as discharge, velocity and momentum. In addition, the water surface profile and the velocity distribution evolved in flow over two layers staircases were analyzed. When the initial water depth at the upper floor was 0.3 m, the maximum velocity at lower floor was 4.2 m/s, and the maximum momentum was 1.2 m3/s2, and its conversion to force per unit width was 1.2 kN/m. This value was equivalent to the hydrostatic force with 50 cm water depth, and evacuation became difficult, as proposed by Ishigaki et al.1) For the flow over staircases connecting two layers, the maximum run-up height in flat part connecting two layers was approximately two times higher than the initial water depth in upper floor, and the rapid shock wave with sharp front and long tail was propagated.

참고문헌 (Reference)

1 이창희, "지하공간 침수해석모형과 연계한 도시침수해석 통합모형" 한국수자원학회 40 (40): 313-324, 2007

2 주재승, "지하공간 침수시 대피능력에 관한 실험적 연구" 한국방재학회 15 (15): 189-196, 2015

3 신동수, "수리모형실험을 통한 복합지하공간 침수방지대책 영향 평가" 한국방재학회 12 (12): 59-65, 2012

4 조완희, "건물 및 도로영향을 고려한 도시지역에서의 2차원 침수해석" 한국방재학회 11 (11): 159-168, 2011

5 I. W. Seo, "Validation of Depth-Averaged Flow Model using Flat-Bottomed Benchmark Problems" 2014

6 송창근, "SU/PG 기법을 이용한 이송이 지배적인 흐름 수치모의" 대한토목학회 32 (32): 175-183, 2012

7 C. G. Song, "Progress in Computational Fluid Dynamics" 2015

8 조완희, "GIS를 활용한 2차원 침수해석에서의 건물영향 분석" 한국지리정보학회 13 (13): 119-132, 2010

9 T. Ishigaki, "Experimental Study of Evacuation from Underground Space by Using Real Size Model" (48B) : 639-649, 2005