Computers and Concrete

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Evaluation of multi-lane transverse reduction factor under random vehicle load

  • Yang, Xiaoyan (Department of Civil Engineering, Dalian University of Technology) ;
  • Gong, Jinxin (Department of Civil Engineering, Dalian University of Technology) ;
  • Xu, Bohan (Department of Civil Engineering, Dalian University of Technology) ;
  • Zhu, Jichao (School of Civil Safety Engineering, Dalian Jiaotong University of Technology)
  • Received : 2015.10.31
  • Accepted : 2017.03.09
  • Published : 2017.06.25
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Abstract

This paper presents the two-, three-, and four-lane transverse reduction factor based on FEA method, probability theory, and the recently actual traffic flow data. A total of 72 composite girder bridges with various spans, number of lanes, loading mode, and bridge type are analyzed with time-varying static load FEA method by ANSYS, and the probability models of vehicle load effects at arbitrary-time point are developed. Based on these probability models, in accordance to the principle of the same exceeding probability, the multi-lane transverse reduction factor of these composite girder bridges and the relationship between the multi-lane transverse reduction factor and the span of bridge are determined. Finally, the multi-lane transverse reduction factor obtained is compared with those from AASHTO LRFD, BS5400, JTG D60 or Eurocode. The results show that the vehicle load effect at arbitrary-time point follows lognormal distribution. The two-, three-, and four-lane transverse reduction factors calculated by using FEA method and probability respectively range between 0.781 and 1.027, 0.616 and 0.795, 0.468 and 0.645. Furthermore, a correlation between the FEA and AASHTO LRFD, BS5400, JTG D60 or Eurocode transverse reduction factors is made for composite girder bridges. For the two-, three-, and four-lane bridge cases, the Eurocode code underestimated the FEA transverse reduction factors by 27%, 25% and 13%, respectively. This underestimation is more pronounced in short-span bridges. The AASHTO LRFD, BS5400 and JTG D60 codes overestimated the FEA transverse reduction factors. The FEA results highlight the importance of considering span length in determining the multi-lane transverse reduction factors when designing two-lane or more composite girder bridges. This paper will assist bridge engineers in quantifying the adjustment factors used in analyzing and designing multi-lane composite girder bridges.

Keywords

References

  1. AASHTO (2002), Standard Specifications for Highway Bridges, 17th Edition, Washington, U.S.A.
  2. AASHTO LRFD (2012), American Association of State Highway and Transportation Officials LRFD Bridge Design Specifications, 7th Edition, Washington, U.S.A.
  3. Altunisik, A.C., Bayraktar, A. and Sevim, B. (2013), "Analytical and experimental modal analyses of a highway bridge model", Comput. Concrete, 12(4), 377-392. https://doi.org/10.12989/cac.2013.12.4.377
  4. Bao, W.G., Li, Y.H. and Zhang, S.D. (1995), "On the reduction coefficients of traffic loading laterally and longitudinally on bridges", Chin. J. High. Transp., 8(1), 80-86.
  5. British Standard (2003), Eurocode 1: Actions on Structures-Part 2: Traffic Loads on Bridges.
  6. BS5400 (2006), Part 2: Specification for Loads, British Standards Institution, London, U.K.
  7. Crespo, M.C. and Casas, J.R. (1997), "A comprehensive traffic load model for bridge safety checking", Struct. Safe., 19(4), 339-359. https://doi.org/10.1016/S0167-4730(97)00016-7
  8. Dawe, P. (2003), Research Perspectives: Traffic Loading on Highway Bridges, Thomas Telford, Reston, U.S.A.
  9. Frederick, G.R. and Tarhini, K.M. (2000), "Wheel load distribution in concrete slab bridges", Comput. Civil Build. Eng., 2000, 1236-1239.
  10. Gong, J.X., Yang, X.Y. and He, S.H. (2011), Research on Load Combination Method and Coefficient, Rep. Traffic Construction Technical Project of the Western China, CCCC Highway Consultants CO., Ltd, Beijing, China.
  11. Guo, T., Li, A.Q. and Zhao, D.L. (2008), "Multiple-peaked probabilistic vehicle load model for highway bridge reliability assessment", J. South. Univ., 38(5), 763-766.
  12. Helmi, K., Bakht, B. and Mufti, A. (2014), "Accurate measurements of gross vehicle weight through bridge weigh-in-motion: A case study", J. Civil Struct. Health Monitor., 4(3), 195-208. https://doi.org/10.1007/s13349-014-0076-5
  13. Holowaty, J. (2012), "Live load distribution for assessment of highway bridges in American and European codes", Struct. Eng. Int., 22(4), 574-578. https://doi.org/10.2749/101686612X13363929518018
  14. JTG D60 (2015), General Code for Design of Highway Bridges and Culverts, Ministry of Communications, Beijing, China.
  15. JTG D62 (2004), Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts, Ministry of Communications, Beijing, China.
  16. Mabsout, M., Tarhini, K. and Jabakhanji, R. (2004), "Wheel load distribution in simply supported concrete slab bridges", J. Brid. Eng., 9(2), 147-155. https://doi.org/10.1061/(ASCE)1084-0702(2004)9:2(147)
  17. Mabsout, M.E., Naddaf, I.Y. and Tarhini, K.M. (2002), "Load reduction in steel girder bridges", Pract. Period. Struct. Des. Constr., 7(1), 37-43. https://doi.org/10.1061/(ASCE)1084-0680(2002)7:1(37)
  18. Mabsout, M.E., Tarhini, K.M. and Frederick, G.R. (1997), "Finite element analysis of steel girder highway bridges", J. Brid. Eng., 2(3), 83-87. https://doi.org/10.1061/(ASCE)1084-0702(1997)2:3(83)
  19. Mabsout, M.E., Tarhini, K.M. and Frederick, G.R. (1999), "Effect of multilanes on wheel load distribution in steel girder bridges", J. Brid. Eng., 4(2), 99-106. https://doi.org/10.1061/(ASCE)1084-0702(1999)4:2(99)
  20. Mei, G., Qin, Q. and Lin, D.J. (2004), "Bimodal renewal processes model of highway vehicle loads", Reliabil. Eng. Syst. Safe., 83(3), 333-339. https://doi.org/10.1016/j.ress.2003.10.002
  21. Meski, E.F., Mabsout, M. and Tarhini, K. (2011), "Investigation of AASHTO live-load reduction in reinforced concrete slab bridges", J. Brid. Eng., 16(6), 792-803. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000237
  22. Miao, T.J. and Chan, T.H.T. (2002), "Bridge live load models from WIM data", Eng. Struct., 24(8), 1071-1084. https://doi.org/10.1016/S0141-0296(02)00034-2
  23. Patrick, M.D. and Huo, X.S. (2004), "Finite element modeling of slab-on-beam concrete bridge superstructures", Comput. Concrete, 1(3), 355-369. https://doi.org/10.12989/cac.2004.1.3.355
  24. Tarhini, K.M. and Frederick, G.R. (1992), "Wheel load distribution in I-girder highway bridges", J. Struct. Eng., 118(5), 1285-1294. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:5(1285)
  25. Ting, X.X., Yan, L. and Zhi, W.W. (2015), "Vehicle load spectrum simulation of long-span bridges", Key Eng. Mater., 648, 35-44. https://doi.org/10.4028/www.scientific.net/KEM.648.35
  26. Zokaie, T., Imbsen, R.A. and Osterkamp, T.A. (1991), Distribution of Wheel Loads on Highway Bridges, National Cooperative Highway Research Program (NCHRP 12-26), Transportation Research Board, Washington, U.S.A.

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