Structural Engineering and Mechanics

  • 제62권6호
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  • Pages.663-674
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  • 2017
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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Evaluating fire resistance of prestressed concrete bridge girders

  • Zhang, Gang (School of Highway, Chang'an University) ;
  • Kodur, Venkatesh (Department of Civil and Environmental Engineering, Michigan State University) ;
  • Hou, Wei (School of Highway, Chang'an University) ;
  • He, Shuanhai (School of Highway, Chang'an University)
  • 투고 : 2017.02.07
  • 심사 : 2017.04.07
  • 발행 : 2017.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents an approach for evaluating performance of prestressed concrete (PC) bridge girders exposed to fire. A finite element based numerical model for tracing the response of fire exposed T girders is developed in ANSYS. The analysis is carried out in three stages, namely, fire temperature calculation, cross sectional temperature evaluation, and then strength, deformation and effective prestress analysis on girders exposed to elevated temperatures. The applicability of the computer program in tracing the response of PC bridge girders from the initial preloading stage to failure stage, due to combined effects of fire and structure loading, is demonstrated through a case study, and validated by test data of a scaled PC box girder under ISO834 fire condition. Results from the case study show that fire severity has a significant influence on the fire resistance of PC T girders and hydrocarbon fire is most dangerous for the girder. The prestress loss caused by elevated temperature is about 10% under hydrocarbon fire till the girder failure, which can lead to the increase in deflection of the PC girder. The rate of deflection failure criterion is suggested to determine the failure of PC T girder under fire.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Ministry of Transport of the People's Republic of China, Central Universities of China

참고문헌

  1. American Society for Testing and Materials (ASTM) (2014), Standard test methods for determining effects of large hydrocarbon pool fires on structural members and assemblies. ASTM E1529-14a, West Conshohocken, PA.
  2. American Society for Testing and Materials (ASTM) (2001), Standard methods of fire test of building construction and materials (test method). ASTM E119-E201, West Conshohocken, PA.
  3. American Society of Civil Engineering (ASCE) (2005), minimum design loads for building construction. ASCE7-05, Restion, VA.
  4. ANSYS (2013), ANSYS metaphysics (Version 14.5), ANSYS Inc., Canonsburg, PA, USA.
  5. Aziz, E. and Kodur, V.K.R. (2013), "An approach for evaluating the residual strength of fire exposed bridge girders", J. Constr. Steel Res., 88(5), 34-42. https://doi.org/10.1016/j.jcsr.2013.04.007
  6. Balaji, A., Aathira, M.S., Pillai, T.M. and Nagarajan, P. (2016), "Reliability studies on RC beams exposed to fire based on is456:2000 design methods", Struct. Eng. Mech., 50(6), 853-866. https://doi.org/10.12989/SEM.2014.50.6.853
  7. British Standard (BS) (1987), Fire tests on building materials and structures-Part 20: Method from determination of the fire resistance of elements of construction (general principles). BS476-20, London, UK.
  8. Capua, D.D. and Mari, A.R. (2007), "Nonlinear analysis of reinforced concrete cross-sections exposed to fire", Fire Safe. J., 42(2), 139-149. https://doi.org/10.1016/j.firesaf.2006.08.009
  9. Davis, M. and Tremel, P. (2007), Bill Williams River Bridge Fire Damage Assessment and Repair, 2007 PCI-FHWA National Bridge Conference, Tucson, AZ.
  10. Dwaikat, M.B. and Kodur, V.K.R. (2008), "A numerical approach for modeling the fire induced restraint effects in reinforced concrete beams", Fire Safe. J., 43(4), 291-307. https://doi.org/10.1016/j.firesaf.2007.08.003
  11. European committee for standardization (CEN) (2002), Actions on structures. Part 1.2 General action-Action on structures exposed to fire. Eurocode1, Brussels, Belgium.
  12. European committee for standardization (CEN) (2004), Design of concrete structures. Part 1.2 General rules-structural fire design. Eurocode 2, Brussels, Belgium.
  13. European Committee for Standardization (CEN) (2005), Design of Steel structures, Part 1.2 General rules-structural fire design. Eurocode3, Brussels, Belgium
  14. Garlock, M., Paya-Zaforteza, I., Kodur, V.K.R. and Li, G. (2012), "Fire hazard in bridges: review, assessment and repair strategies", Eng. Struct., 35(1), 89-98. https://doi.org/10.1016/j.engstruct.2011.11.002
  15. Hitesh, L., Tarvinder, S., Akanshu, S., Reddy, G.R. and Singh, R.K. (2014), "Prediction of post fire load deflection response of RC flexural members using simplistic numerical approach", Struct. Eng. Mech., 50(6), 755-772. https://doi.org/10.12989/sem.2014.50.6.755
  16. Hou, W. (2014), "Study on the performance of concrete box girder of prestressed concrete structure after fire", Chang'an University, Xi'an, Shaanxi. (in Chinese)
  17. International Standard Organization (ISO) (1999), Fire resistance tests - elements of building construction- Part 1: General requirements. ISO834, Geneva, Switzerland.
  18. Kim, W., Laman, J.A. and Park, J.Y. (2014), "Reliability-based design of prestressed concrete girders in integral abutment bridges for thermal effects", Struct. Eng. Mech., 50(3), 305-322. https://doi.org/10.12989/sem.2014.50.3.305
  19. Kodur, V.K.R. and Dwaikat, M. (2008), "A numerical model for predicting the fire resistance of reinforced concrete beams", Cement Concrete Compos., 30(5), 431-443. https://doi.org/10.1016/j.cemconcomp.2007.08.012
  20. Kodur, V.K.R. and Naser, M.Z. (2013), "Importance factor for design of bridges against fire hazard", Eng. Struct., 54(3), 207-220. https://doi.org/10.1016/j.engstruct.2013.03.048
  21. New York State Department of Transportation. (2008), Bridge Fire Incidents in New York State, New York State Department of Transportation, USA.
  22. Society of Fire Protection Engineers (SFPE) (2004), "Fire exposures to structural elements-engineering guide", Bethesda, MD, USA.
  23. Zhang, H.Y. and Zheng, W.Z. (2007), "Mechanical property of steel strand at high temperature", J. Harbin Inst. Technol., 39(6), 861-865. (in Chinese)
  24. Zhu, J.S., Chen, C. and Han, Q.H. (2014), "Vehicle-bridge coupling vibration analysis based fatigue reliability prediction of prestressed concrete highway bridges", Struct. Eng. Mech., 49(2), 203-223. https://doi.org/10.12989/sem.2014.49.2.203

피인용 문헌

  1. Performance of prestressed concrete box bridge girders under hydrocarbon fire exposure vol.23, pp.8, 2017, https://doi.org/10.1177/1369433219898102
  2. Fire Performance of Continuous Steel-Concrete Composite Bridge Girders vol.25, pp.3, 2017, https://doi.org/10.1007/s12205-021-0985-x