International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
권호 표지
DOI QR코드

DOI QR Code

Dynamic Performance of Guardrail System with Various Post Shapes Based on 3-D Soil Material Model

3차원 지반재료 모델기반의 다양한 지주형상을 갖는 노측용 가드레일의 동적성능 평가

  • Lee, Dong Woo (Department of Civil Engineering, YeungNam University) ;
  • Yeo, Yong Hwan (Department of Civil Engineering, YeungNam University) ;
  • Yang, Seung Ho (Department of Civil Engineering, YeungNam University) ;
  • Woo, Kwang Sung (Department of Civil Engineering, YeungNam University)
  • 이동우 (영남대학교 건설시스템공학과) ;
  • 여용환 (영남대학교 건설시스템공학과) ;
  • 양승호 (영남대학교 건설시스템공학과) ;
  • 우광성 (영남대학교 건설시스템공학과)
  • Received : 2014.03.04
  • Accepted : 2014.07.22
  • Published : 2014.10.16
Download PDF
⟨ Previous Next ⟩

Abstract

PURPOSES : This paper evaluates, using LS/DYNA-3D software, the vehicle impact performance of flexible barriers made of steel W-Beam supported by four different types of post configurations. These types include circular post, H-shape post, C-shape post, and square post. METHODS : The post-soil interaction has been investigated according to different impact angles. For this purpose, energy absorption, maximum displacements of post and rail, and occupant risk index of THIV have been compared each other. The three dimensional soil material model, instead of the conventional spring model based on Winkler and p-y curve, has been used to increase the correctness of computational model. RESULTS : It is noted the crash energy absorption has been increased with respect to the increase of impact angle. CONCLUSIONS : In particular, a post with open section(H-shape, C-shape) shows the greater crash energy absorption capability as compared with a post with closed section under the same level of impact conditions.

Keywords

References

  1. AASHTO(1996), Roadside Design Guide, American Association of State Highway Officials, Washington D.C., U.S.A.
  2. AASHTO(2009), Manual for Assessing Safety Hardware(MASH), American Association of State Highway Officials, Washington D.C., U.S.A.
  3. East Nippon Expressway Company Limited (2008), Design Guidelines of Guardrail
  4. European Standard EN 1317-3(2010), Road Restraint Systems-Part 3, Status of a British Standard, BSI.
  5. FHWA(2006), Soils and Foundations, NHI Course No. 132012, Reference Manual-Volume I, Publication No. FHWA NHI-06-088, Federal Highway Administration, U.S.A.
  6. H. Hirai (2012), A Winkler model approach for vertically and laterally loaded piles in nonhomogeneous soil, Int. J. Numer. And Meth. Geomech., Vol.36, pp.1869-1897. https://doi.org/10.1002/nag.1078
  7. H.K. Kim, Y.S. Kim, K.S. Noh (2004), An Analytical Approach for Evaluation of Embedded Depth of a Guardrail Post in Pavement, Korean Society of Civil Engineers, pp 221-228
  8. K.S. Woo, M.G. Ko, S.H. Cho, W. Kim (1994), A Study on Dynamic Behavior of Guardrail Associated with Design Variables, Computational Structural Engineering Institute of Korea, Vol.7, No.2, pp.89-99.
  9. L. Barden(1963), The Winkler model and its application to soil, The Structural Engineer, Vol.41
  10. L.C. Reese(1984), Handbook on design of piles and drilled shafts under internal loads. U.S. DOT, FHWA, Washington D.C.
  11. LS-DYNA 971(2007), Keyword User's Manual Volume I, Livermore Software Technology Corporation(LSTC)
  12. http://www.ncac.qwu.edu/aechives/model (2002), FHWA/NHTSA National Crash Analysis Center, George Washington University, U.S.A.
  13. Ministry of land, Infrastructure and Transport (2012), Installation and maintenance guideline road safety appurtenance-Bridge Barrier
  14. Ministry of land, Infrastructure and Transport(2013), Specifications on the Structure and facility standareds
  15. M.W. O'Neil, S.M. Gazioglu (1984), An evaluation of p-y relationships in clays, Rep. Prepared for the American Petroleum Institute, Univ. of Houston, U.S.A.
  16. S.S. Rajashree, T.G. Sitharam(2001), Nonlinear finite element modeling of batter piles under lateral load, J. Geotech Geoenviron Eng., ASCE Vol.127, No.7, pp.604-612. https://doi.org/10.1061/(ASCE)1090-0241(2001)127:7(604)
  17. TRB(1993), Recommended Procedures for the Safety Performance Evaluation of Highway Features, NCHRP Report 350, U.S.A.
  18. Y. Yoshida, I. Motonori, T. Kokusho(1988), Empirical formulas of SPT blow-counts for gravelly soils, Proceedings of ISOPT-1 for Penetration Testing, pp.381-387.