Dynamic behavior analysis of tunnel structure under gas explosion load

Young-Min Kim

doi:None

All Issue

2011 Vol.13, Issue 5 Preview Page

Dynamic behavior analysis of tunnel structure under gas explosion load 가스폭발하중에 의한 터널 구조물의 동적거동해석

30 September 2011. pp. 413-430

PDF XML

Abstract

Consideration on the explosion resistant design of infrastructure has increased in the recent years. The explosion load is caused by gas explosion or bomb blast. In this study an analytical model is developed, whereby the tunnel structure is divided in several elements that are schematized as single degree of freedom mass-spring-dashpot systems on gas explosion. Using this simple model a sensitivity analysis has been carried out on tunnel structure design parameters such as explosive peak pressure, duration of the load, thickness of structure, burial depth. Finite element method was used to investigate the dynamic response and plastic zone of a tunnel under gas explosion. And it was found from the comparison of the analysis results that there are slight differences in the response of the intermediate wall between the single degree of freedom mass-spring-dashpot model and FEM.

Keywords

Tunnel structure

explosion load

finite element method

dynamic analysis

plastic zone

최근 들어, 폭발하중에 대해여 안전한 사회기반시설에 대한 관심이 증가하고 있다. 폭발하중은 가스폭발이나 폭탄폭발에 의하여 발생된다. 본 연구에서는 가스폭발하중을 받는 터널구조물을 각 부재로 나누어 1자유도 질량-스프링-감쇠기 모델로 치환하여 해석하는 모델을 개발하였다. 간이 모델을 사용하여 터널설계 요인인 최대 폭발하중크기, 지속시간, 부재 두께, 토피고에 대하여 민감도 해석을 수행하였다. 또한, 유한요소법을 사용하여 가스폭발에 대한 터널의 동적거동과 주변지반에 발생되는 파괴영역에 대하여 조사하였다. 1자유도 질량-스프링-감쇠기 모델과 FEM 해석결과의 비교로부터 터널의 중앙벽에 대한 동적거동결과는 거의 차이가 없음을 보여주었다.

키워드

터널구조물

가스폭발하중

유한요소법

동적해석

소성영역

References

1. 이경구(2005), “폭발 등 극한하중 하에서의 건물붕괴 방지를 위한 최근 연구동향”, 한국강구조학회지, Vol. 17, No. 4, pp. 39-45.

2. 문훈기, 신종호(2008), “발파진동이 터널구조물에 미치는 영향”, 한국터널공학회논문집, Vol. 10, No. 3, pp. 207-219.

3. 박인준, 유지형(2010), “부지응답해석에 기초한 지하공간 내진설계 개념”, 한국터널공학회논문집, Vol. 12, No. 3, pp. 257-264.

4. 송기일, 정성훈, 조계춘, 이정학(2010), “절리암반의 변형율 의존적 전단탄성계수 및 감쇠비 특성을 고려한 터널의 내진해석”, 한국터널공학회논문집, Vol. 12, No. 4, pp. 295-306.

5. Braja, M.D. (1983), “Fundamentals of Soil Dynamics”, Elsevier, pp. 13-18.

6. Clough, R.W., Pezien, J. (1993), “Dynamics of structures”, 2nd, McGraw-Hill, pp. 242-244.

7. Department of the US Army (1986), “Fundamentals of protective design for conventional weapons”, Technical Manual TM 5-855-1.

8. Huabei, L. (2009), “Dynamic analysis of subway structures under blast loading”, Technical Report, The City College of New York.

9. Mario, P. (1985), “Structural dynamics theory & computation 2nd”, Van Nostrand Reinhold, pp. 39-41.

10.Nederlands Normalisatie-Institut (NEN), (2006), “Eurocode 1: Actions on structure-Part 1-7: General actions-Accidental actions”, NEN-EN 1991-1-7, Annex D.

11.Resengren, L., Brandshaug, T., Andersson, P., Lundman, P. (2003). “Modelling effects of accidental explosions in rock tunnels”, ISRM-2003: Technical Loadmap for rock Mechanics, South African Institute of Mining and Metallurgy. pp. 985-990.

12.Shahnazari, H., Esmaeili, M., Hosseini, H.R. (2010), “Simulating the effects of projectile explosion on a jointed rock mass using 2D DEM: A case study of Ardebil-Mian railway”, Inter. J. of Civil Engineering, Vol. 8, No. 2, pp. 125-133.

13.Vermeer, P.A., Brinkgreve, R.B.J. (2002), “PLAXIS: Finite element code for soil and rock mechanics”, Balkema, Rotterdam.

14. Zhenwen, Y. (1997), “Finite element simulation of response of buried shelters to blast loadings”, Finite Element in Analysis and Design, Vol. 24, pp. 113-132.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 13
No :5
Pages :413-430
Received Date : 2011-09-14
Revised Date : 2011-09-21
Accepted Date : 2011-09-28

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

All Issue