KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Evaluation of Blast Resistance of Slab-Column Connections According to the Confinement Effects and Drop Panel

슬래브-기둥 접합부의 구속도 및 드롭패널에 따른 방폭 성능 평가

  • Received : 2016.12.05
  • Accepted : 2017.02.23
  • Published : 2017.04.01
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Abstract

The numerical analysis was conducted to evaluate the behavior of slab-column connection subjected to blast loads using LS-DYNA. The typical form of slab-interior column connection for analysis was considered as a reference specimen and the drop panel slab-interior column was designed to verify the effects of drop panel. The slab-column connections, which were composed of interior, edge and corner column, were additionally analyzed to compare their confinement effects of specimens. Analysis results were contained the failure shape of connection, behavior of member and so on. From the results, the blast-resistant capacities of slab-column connection would be enhanced by reinforcing the drop panel. In addition, the performance of connections could be improved, when the confinement effects were enhanced.

본 연구에서는 폭발하중을 받는 슬래브-기둥 접합부의 거동을 해석적으로 분석하였다. 슬래브-기둥의 거동을 분석하기 위해 유한요소해석프로그램 LS-DYNA를 사용하여 폭발해석을 수행하였다. 대상 접합부의 형태는 일반적인 내부기둥형태의 슬래브-기둥 접합부와 기둥주위에 드롭패널(drop panel)을 보강한 접합부로 설정하였다. 또한, 슬래브에 의한 기둥의 구속도에 따라 내부기둥, 외부기둥 그리고 모서리기둥 시험체를 모델링하여 비교분석이 수행되었다. 해석결과는 접합부의 파괴형상, 단위부재의 거동 등을 포함하고 있다. 해석결과 드롭패널을 보강한 경우 슬래브-기둥 접합부의 거동이 향상되는 것을 확인하였으며 슬래브에 의한 기둥의 구속도가 감소할수록 거동이 저하되는 것을 확인하였다.

Keywords

References

  1. ACI (American Concrete Institute) Committee 318 (2014). ACI318-14 : Building code requirements for structural concrete & commentary, American Concrete Institute, Michigan, US.
  2. ACI/ASCE (American Concrete Institute-American Society of Civil Engineers) Committee 352 (2012) ACI352.1R-11 : Guide for design of slab-column connections in monolithic concrete structures, American Concrete Institute, Michigan, US.
  3. ASCE/SEI (American Society of Civil Engineers/Structural Engineering Institute) (2011). ASCE/SEI 59-11 : Blast protection of building. ASCE, Virginia, US.
  4. Bae, D. M. and Zakki, A. F. (2011). "Comparisons of multi material ALE and single material ALE in LS-DYNA for estimation of acceleration response of free-fall lifeboat." Journal of the Society of Naval Architects of Korea, Vol. 48, No. 6, pp. 552-559. https://doi.org/10.3744/SNAK.2011.48.6.552
  5. Bianchini, A. C., Woods, R. E. and Kesler, C. E. (1960). "Effect of floor concrete strength on column strength." ACI Journal Proceedings, Vol. 56, No. 5, pp. 1149-1170.
  6. Brannon, R. M. and Leelavanichkul, S. (2009). Survey of four damage models for concrete, Sandia National Laboratories, SAND2009- 5544, California, US.
  7. Crawford, J. E., Wu, Y., Choi, H. J., Magallanes, J. M. and Lan, S. (2012). Use and validation of the release III K&C concrete material model in LS-DYNA, Karagozian&Case Technical Report TR-11-36.5, California, US.
  8. Department of Defense (2008). UFC 3-340-02 : Structures to resist the effects of accidental explosions. Department of Defense, California, US.
  9. Dusenberry, D. O. (2009). Handbook for blast resistant design of buildings. WILEY, US.
  10. Foglar, M. and Kovar, M. (2013). "Conclusions for experimental testing of blast resistance of FRC and RC bridge decks." International Journal of Impact Engineering, Vol. 59, pp. 18-28. https://doi.org/10.1016/j.ijimpeng.2013.03.008
  11. Gamble, W. L. and Klinar, J. D. (1991). "Tests of high-strength concrete columns with intervening floor slabs." Journal of Structural Engineering-ASCE, Vol. 117, No. 5, pp. 1462-1476. https://doi.org/10.1061/(ASCE)0733-9445(1991)117:5(1462)
  12. Jang, I. H. (2007). Sloshing response analysis of LNG carrier tank using fluid-structure interaction analysis technique of LS-DYNA3D, Master's thesis, Korea Maritime and Ocean University (in Korea).
  13. LSTC (Livermore Software Technology Corporation) (2013a). LSDYNA keyword user's manual volume I, Livermore Software Technology Corporation, California, US.
  14. LSTC (Livermore Software Technology Corporation) (2013b). LSDYNA keyword user's manual volume II material models. Livermore Software Technology Corporation, California, US.
  15. Ministry of Land, Infrastructure and Transport (MOLIT) (2010). Design guidelines of building to prevent the terrorism (in Korea).
  16. Ministry of National Defense (MND) (2009). DMFC 4-40-50 Design criteria of blast-resistant facility (in Korea).
  17. Park, J. Y. (2011). Modern Protective Structures, CIR.
  18. Shi, Y. and Stewart, M. G. (2015). "Damage and risk assessment for reinforced concrete wall pannels subjected to explosive blast loading." International Journal of Impact Engineering, Vol. 85, pp. 5-19. https://doi.org/10.1016/j.ijimpeng.2015.06.003
  19. Thiagarajan, G., Kadambi, A. V., Robert, S. and Johnson, C. F. (2015). "Experimental and finite element analysis of doubly reinforced concrete slabs subjected to blast loads." International Journal of Impact Engineerings, Vol. 75, pp. 162-173. https://doi.org/10.1016/j.ijimpeng.2014.07.018
  20. William, L. B. (2010). Design of blast-resistant building in petrochemical facilities. American Society of Civil Engineering, US.
  21. Yandzio, E. and Gough, M. (1999). Protection of buildings against explosions, The Steel Construction Institute, Ascot, UK.
  22. Yoon, Y. S. (2013). Mechanics & design of reinforced concrete. CIR (in Korea).
  23. Zahra S. T. and Jeffery S.-V. (2012). "A comparion between three different blast methods in LS-DYNA : LBE, MM-ALE, Coupling of LBE and MM-ALE." 12th International LS-DYNA Users Conference, Detroit, US.