Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
권호 표지
DOI QR코드

DOI QR Code

Analytical Study on Effects of Gravity Load on Blast Resistance of Steel Compressive Members

강재압축재의 방폭성능에 대한 중력하중효과의 해석적 연구

  • Lee, Kyungkoo (Dept. of Architectural Engineering, Dankook University) ;
  • Lee, Moon Chang (Dept. of Architectural Engineering, Dankook University)
  • Received : 2014.11.10
  • Accepted : 2015.03.20
  • Published : 2015.06.27
Download PDF
⟨ Previous Next ⟩

Abstract

Equivalent Single-Degree-of-Freedom(SDOF) analysis, most used for blast-resistant design, does not consider the effects of gravity load on the performance evaluation of blast resistance of structural members. However, since there exists gravity load on columns and walls of structures, the blast resistance of structural members should be evaluated considering gravity load on them. In this paper, an approach to reflect the gravity load effects on the equivalent SDOF analysis for dynamic blast response of structural members is proposed. For this purpose, the parametric studies using finite element analysis were performed by varying maximum blast load, blast load duration, and gravity load with constant the resistance and natural period of a structural member. The finite element analysis results were compared with the equivalent SDOF analysis results and the blast response of the structure member was estimated by conducting finite element analyses for various gravity loads. Finally, a graphical solution for ductility of a structural member with the variables of blast load, gravity load and structural member properties was developed. The blast response of structural members under gravity load could be estimated reasonably and easily by using this graphical solution.

방폭설계에 가장 널리 사용되고 있는 등가단자유도 해석법은 구조부재의 방폭성능평가에 있어서 중력하중효과를 전혀 고려하지 않고 있다. 그러나 구조물의 기둥 및 벽체의 경우 일반적으로 중력하중이 존재하므로, 이를 고려한 구조부재의 방폭성능을 평가하여야 한다. 이 논문에서는 강재 압축재의 동적 폭발응답 등가단자유도해석에 중력하중효과를 반영하는 방안을 제시하고자 한다. 이를 위하여 압축재의 휨저항력과 고유주기를 일정하게 하고 최대폭발하중 및 지속시간, 중력하중을 달리하여 변수해석을 수행하였다. 등가단자유도해석결과와 유한요소해석결과를 비교하고, 다양한 중력하중을 작용한 경우에 대하여 유한요소해석에 의한 압축재의 폭발응답을 평가하였다. 최종적으로, 폭발하중, 중력하중, 부재특성에 따른 강재 압축재의 소요연성을 도표화하였다. 이 도표를 활용하여 중력하중을 고려한 강재 압축재의 폭발응답을 합리적이고 편리하게 예측할 수 있을 것으로 사료된다.

Keywords

References

  1. ASCE (2010) Design of Blast Resistant Buildings in Petrochemical Facilities, Second edition, American Society of Civil Engineers.
  2. DoD (2008) Structures to Resist the Effects of Accidental Explosions, Unified Facilities Criteria UFC 3-340-02, Department of Defense.
  3. 이철호, 강기용, 김성용, 구철회(2013) 각형 콘크리트충전 강관기둥 부재의 구조설계기준 비교연구, 한국강구조학회논문집, 한국강구조학회, 제25권, 제4호, pp.389-398. (Lee, C.H., Kang, K.Y., Kim, S.Y., and Koo, C.H. (2013) Review of Structural Design Provisions of Rectangular Concrete Filled Tubular Columns, Journal of Korean Society of Steel Construction, KSSC, Vol.25, No.4, pp. 389-398 (in Korean).)
  4. 이명재, 김철환, 김희동(2014) HSA800 강재를 적용한 합성기둥의 축방향 내력 평가, 한국강구조학회논문집, 한국강구조학회, 제26권, 제5호, pp.473-483. (Lee, M.J., Kim, C.H. and Kim, H.D. (2014) The Evaluation of the Axial Strength of Composite Column with HSA800 Grade Steel, Journal of Korean Society of Steel Construction, KSSC, Vol.26, No.5, pp. 473-483. (in Korean).)
  5. 윤원순, 이철호, 김정재(2014) 가새좌굴을 고려한 X형 내진 가새골조의 기둥축력 산정법, 한국강구조학회논문집, 한국강구조학회, 제26권, 제6호, pp.523-535. (Yoo, W.S., Lee, C.H. and Kim, J.J. (2014) Prediction of Column Axial Force in X-braced Seismic Steel Frames Considering Brace Buckling, Journal of Korean Society of Steel Construction, KSSC, Vol.26, No.6, pp.523-535 (in Korean).)
  6. 이경구(2010) 폭발하중을 받는 강재압축재의 잔여저항 성능 평가, 대한건축학회논문집구조계, 대한건축학회, 제26권, 제10호, pp.37-44. (Lee, K.K. (2010) Evaluation of Residual Capacity of Steel Compressive Members Under Blast Load, Journal of the The Architectural Institute of Korea Structure & Construction, AIK, Vol.26, No.10, pp.37-44 (in Korean).)
  7. 이경구, 김태진, 김은석, 김진구(2007) 폭발하중에 의한 강재기둥의 거동, 대한건축학회논문집구조계, 대한건축학회, 제23권, 제7호, pp.37-44. (Lee, K.K., Kim, T.J., Kim, E.S. and Kim, J.K. (2007) Behavior of Steel Columns Subjected to Blast Loads, Journal of the The Architectural Institute of Korea Structure & Construction, AIK, Vol.23, No.7, pp.37-44 (in Korean).)
  8. 이경구, 김태진, 김진구(2007) 경계조건에 따른 강구조물의 폭발응답평가, 대한건축학회논문집구조계, 대한건축학회, 제23권, 제12호, pp.43-50. (Lee, K.K., Kim, T.J. and Kim, J.K. (2007) Blast Response Evaluation of Steel Structures due to the Boundary Conditions, Journal of the The Architectural Institute of Korea Structure & Construction, AIK, Vol.23, No.12, pp. 43-50 (in Korean).)
  9. 이경구, 노지은, 김선웅(2013) 중력하중을 고려한 H형강 기둥의 방폭성능에 대한 해석적 평가, 한국방재학회논문집, 한국방재학회, 제13권, 제2호, pp.31-36. (Lee, K.K. Rho, J.E. and Kim, S.W. (2013) Analytical Evaluation of Blast Resistance of H-shaped Columns Considering Gravity Load, Journal of The Korean Society of Hazard Mitigation, Vol.13, No.2, pp.31-36 (in Korean).)
  10. Glasstone, S. and Dolan, P.J. (1977) The effects of nuclear weapons, United States Department of Defense and Energy Research And Development Administration.
  11. TM 5-856 (1960) Design of structures to Resist the Effect of Atomic Weapons, Technical Manuals 5-856-1 through 9(9 Volumes), Department of the Army, Washington, DC.
  12. 한국강구조학회(2009) KBC2009 강구조설계, 구미서관. (KSSC (2009) KBC2009 Design of Steel Structures, Korean Society of Steel Construction, Goomiseogwan (in Korean).)
  13. 이경구(2012) 구조부재 폭발응답 해석프로그램, 단국대학교. (Lee, K.K. (2012) Program for Blast Response Analysis of Structural Members, Dankook University)
  14. LS-DYNA (2009) LS-DYNA Keyword User's Manual, version 971, Livermore Software Technology Corporation.
  15. LS-DYNA (2006) LS-DYNA Theoretical Manual, Livermore Software Technology Corporation.

Cited by

  1. 고속 변형률속도 효과를 고려한 폭발하중을 받는 보강형 방폭벽 구조의 동적 특성 vol.28, pp.2, 2015, https://doi.org/10.7781/kjoss.2016.28.2.065
  2. 자유공중폭발에 의한 폭발압력과 충격량에 대한 수치해석 vol.28, pp.4, 2015, https://doi.org/10.7781/kjoss.2016.28.4.271