Development of Live Load Distribution Factor Equation for Concrete Multicell Box-Girder Bridges under Vehicle Loading
Source abstract
Abstract
The evaluation and design of concrete bridges in large part depend on the transverse distribution characteristics of the live load carried and the service level. The live load distribution for continuous concrete multicell box-girder bridges varies according to bridge configuration, so when designing such bridges, it is important to determine the maximum negative stress at the piers, the midspan positive (tensile) stress and the deflection of the bridge when subjected to live loads. This paper reports an extensive parametric study to determine the maximum stress, deflection, and moment distribution factors for two span multicell box-girder bridges based on a finite element analysis of 120 representative numerical model bridges. Bridge parameters were selected to extend the parameters and ranges of current live load distribution factors defined by AASHTO LRFD specifications. The results indicate that the span length, number of boxes, and the number of lanes all significantly affect the positive (tensile) and the negative (compression) stress distribution factors. A set of equations proposed to describe the behavior of such bridges under AASHTO LRFD live loads yielded results that agreed closely with the numerically derived results for the stress and deflection distribution factors.
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OpenAlex topics: Structural Engineering and Vibration Analysis · Structural Load-Bearing Analysis · Structural Behavior of Reinforced Concrete
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References (29)
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1. AASHTO. (2002). Standard specifications for highway bridges (17th ed.). Washington, D.C.: American Association of State Highway and Transportation Officials.
2. AASHTO LRFD (2014) LRFD bridge design specifications (14th ed.) U.S.: American Association of State Highway and Transportation Officials, National Academy of Sciences National Research Council.
3. AASHTO. (2017). LRFD bridge design specifications (8th ed.). Washington D.C.: American Association of State Highway and Transportation Officials, National Academy of Sciences National Research Council.
4. Ashebo, D. B., Chan, T. H. T., & Yu, L. (2007). Evaluation of dynamic loads on a skew box girder continuous bridge Part I: Field test and modal analysis. Engineering Structures, 29, 1064–1073. https://doi.org/10.1016/j.engstruct.2006.07.014 .10.1016/j.engstruct.2006.07.014 ↗
5. Bae, H. U., & Oliva, M. G. (2012). Moment and shear load distribution factors for multigirder bridges subjected to overloads. Journal of Bridge Engineering, 17, 519–527. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000271 .10.1061/(ASCE)BE.1943-5592.0000271 ↗
6. Barr, P., Eberhard, M., & Stanton, J. (2001). Live-load distribution factors in prestressed concrete girder bridges. Journal of Bridge Engineering, 11, 573–581. https://doi.org/10.1061/(ASCE)1084-0702(2006)11:5(573) .10.1061/(ASCE)1084-0702(2006)11:5(573) ↗
7. Computers & Structures, Inc. (2017). CSIBridge, version 20. http://www.csiamerica.com .
8. Deng, Y., & Phares, B. (2016). Automated bridge load rating determination utilizing strain response due to ambient traffic trucks. Engineering Structures, 117, 101–117. https://doi.org/10.1016/j.engstruct.2016.03.004 .10.1016/j.engstruct.2016.03.004 ↗
9. Deng, Y., Phares, B. M., & Ping, L. (2017). Lateral live-load distribution of dual-lane vehicles with nonstandard axle configurations. Journal of Bridge Engineering, 22, 1–14. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001014 .10.1061/(ASCE)BE.1943-5592.0001014 ↗
10. Fanous, F., May, J., & Wipf, T. (2010). Development of live-load distribution factors for glued-laminated timber girder bridges. Journal of Bridge Engineering, 16, 179–187. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000127 .10.1061/(ASCE)BE.1943-5592.0000127 ↗
11. Hall, D. H., Grubb, M. A., & Yoo, C. H. (1999). Improved design specifications for horizontally curved steel girder highway bridges. NCHRP Report 424. Transportation Research Board. Washington D.C: National Academy Press.
12. Hays, C. O., Sessions, M., & Berry, A. J. (1986). Further studies on lateral load distribution using a finite element method. Transportation Research Record, 1072, 6–14.
13. Higgins, C., Turan, T. O., Connor, J. R., & Liu, J. (2011). Unified approach for LRFD live load moments in bridge decks. Journal of Bridge Engineering, 16, 804–811. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000217 .10.1061/(ASCE)BE.1943-5592.0000217 ↗
14. Hughs, E., & Idriss, R. (2006). Live-load distribution factors for prestressed concrete, spread box-girder bridge. Journal of Bridge Engineering, 11, 573–581. https://doi.org/10.1061/(ASCE)1084-0702(2006)11:5(573) .10.1061/(ASCE)1084-0702(2006)11:5(573) ↗
15. Huo, X. S., Conner, S., & Iqbal, R. (2003). Re-examination of the simplified method (Henry’s Method) of distribution factors for live load moment and shear. Final Report, Tennessee DOT Project No. TNSPR-RES 1218, Tennessee Technological University, Cookeville, TN.
16. Huo, X., & Zhang, Q. (2008). Effect of skewness on the distribution of live load reaction at piers of skewed continuous bridges. Journal of Bridge Engineering, 13, 110–114. https://doi.org/10.1061/(ASCE)1084-0702(2008)13:1(110) .10.1061/(ASCE)1084-0702(2008)13:1(110) ↗
17. Li, H. (1992). Thin-walled box beam finite elements for static analysis of curved and skew box girder bridges. Ph.D. Thesis, Department of Civil Engineering, Carleton University Ottawa, Canada.
18. Mohseni, I., & Khalim, A. R. (2013). Development of the applicability of simplified Henry’s method for skewed multicell box-girder bridges under traffic loading conditions. Journal of Zhejiang University: Science A, 13, 915–925. https://doi.org/10.1590/S1679-78252013000200002 .10.1590/S1679-78252013000200002 ↗
19. Mohseni, I., Khalim, A. R., & Nikbakht, E. (2014). Effectiveness of skewness on dynamic impact factor of concrete multicell box-girder bridges subjected to truck loads. Arabian Journal for Science & Engineering, 8(6083–6094), 97. https://doi.org/10.1631/jzus.A1200098 .10.1631/jzus.A1200098 ↗
20. Newmark, N. M. (1938). A distribution procedure for analysis of slabs continuous over flexible beams. Urbana, IL: University of Illinois.
21. Samaan, M. (2004). Dynamic and static analyses of continuous curved composite multiple-box girder bridges. Ph.D. Thesis, University of Windsor. Windsor, Ontario, Canada.
22. Samaan, M., Sennah, K. M., & Kennedy J. B. (2002a). Distribution of wheel loads on continuous steel spread-box girder bridges. Journal of Bridge Engineering, 7(3), 175–183.10.1061/(ASCE)1084-0702(2002)7:3(175) ↗
23. Samaan, M., Sennah, K .M., & Kennedy J. B. (2002b). Positioning of bearings for curved continuous spread-box girder bridges. Canadian Journal of Civil Engineering, 29, 641–652.10.1139/l02-049 ↗
24. Semendary, A., Walsh, K., & Steinberg, E. (2017). Early-age behavior of an adjacent prestressed concrete box-beam bridge containing UHPC shear keys with transverse dowels. Journal of Bridge Engineering, 22, 1–14. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001034 .10.1061/(ASCE)BE.1943-5592.0001034 ↗
25. Song, S., Chai, Y., & Hida, S. (2003). Live-load distribution factors for concrete box-girder bridges. Journal of Bridge Engineering, 8, 273–281. https://doi.org/10.1061/(ASCE)1084-0702(2003)8:5(273) .10.1061/(ASCE)1084-0702(2003)8:5(273) ↗
26. Terzioglu, T., Hueste, M. B. D., & Mander, J. B. (2017). Live load distribution factors for spread slab beam bridges. Journal of Bridge Engineering, 22, 1–15. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001100 .10.1061/(ASCE)BE.1943-5592.0001100 ↗
27. Zheng, L. (2008). Development of new distribution factor equations of live load moment and shear for steel open-box girder bridges. Ph.D. dissertation, Tennessee Technological University, Cookeville, TN.
28. Zokaie, T. (2000). AASHTO LRFD live load distribution specifications. Journal of Bridge Engineering, 5, 131–138. https://doi.org/10.1061/(ASCE)1084-0702(2000)5:2(131) .10.1061/(ASCE)1084-0702(2000)5:2(131) ↗
29. Zokaie, T., Mish, K., & Imbsen, R. (1993). Distribution of wheel loads on highway bridges. Phase 3. Final Report to National Cooperative Highway Research Program (NCHRP rep. 12–26), Transportation Research Record, Washington D.C.