Abstract
The design of bridges depends on the transverse distribution characteristics of the live load that is carried. The study goal is to evaluate experimentally and numerically the Live Load Distribution Factors (LLDFs) proposed by the American Association of State Highway and Transportation Officials (AASHTO) specifications for a case of highway bridge with a composite steel–concrete structural system. Different trucks have been used to attain the static tests and achieve maximum values for the design live loads and deflections for the composite steel–concrete bridge girders. Furthermore, a linear finite element analysis has been executed for the composite bridge to outspread the LLDFs assessment and to study the influence of the Cross-Frame Diaphragm (CFD) on the LLDFs. The moment LLDFs quantities have been calculated according to AASHTO specifications, they have been found more conservative while shear quantities have been found critical, especially in exterior girders. Also, the contribution of CFD in the spread of the live load among the girders has been verified by the redistribution of the LLDFs between the internal and exterior girders.
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References
Zokaie, T. (2000). AASHTO-LRFD live load distribution specifications. Journal of Bridge Engineering, 5(2), 131–138.
Tabsh, S. W., & Tabatabai, M. (2001). Live load distribution in girder bridges subject to oversized trucks. Journal of Bridge Engineering, 6(1), 9–16.
Kim, Y. J., Tanovic, R., & Wight, R. G. (2010). Load configuration and lateral distribution of NATO wheeled military trucks for steel I-girder bridges. Journal of Bridge Engineering, 15(6), 740–748.
Li, J., & Chen, G. (2011). Method to compute live-load distribution in bridge girders. Practice Periodical on Structural Design and Construction, 16(4), 191–198.
Seo, J., Phares, B. M., Dahlberg, J., Wipf, T. J., & Abu-Hawash, A. (2014). A framework for statistical distribution factor threshold determination of steel–concrete composite bridges under farm traffic. Engineering Structures, 69, 72–82.
Fatemi, S. J. (2016). Load distribution factors of straight and curved steel concrete composite box and I girder bridges [Ph.D. Dissertation]. University of Adelaide, Australia.
Tabsh, S. W., & Mitchell, M. M. (2016). Girder distribution factors for steel bridges subjected to permit truck or super load. Structural Engineering and Mechanics: An international Journal, 60(2), 237–249.
Allawi, A., Al-Sherrawi, M., Al Gharawi, M., & El-Zohairy, A. (2019). A case study to evaluate live load distributions for pre-stressed RC bridge. In Challenges in mechanics of time-dependent materials (Vol. 2, pp. 73–85). Springer.
Bakht, B. (1988). Analysis of some skew bridges as right bridges. Journal of Structural Engineering, 114(10), 2307–2322.
Mertz, D. R. (2001). Designer's guide to cross-frame diaphragms. American Iron and Steel Institute.
Bishara, A. G. (1993). Cross frames analysis and design, FHWA/OH-93/004. Federal Highway Administration, Washington, D.C. and Ohio Department of Transportation, Columbus, OH.
Shi, J., 1997. Brace stiffness requirements of skewed bridge girders [M.Sc. Dissertation]. University of Houston, Houston, TX.
Khaloo, A. R., & Mirzabozorg, H. (2003). Load distribution factors in simply supported skew bridges. Journal of Bridge Engineering, 8(4), 241–244.
Watheej, Z., & Al-Sherrawi, M. H. (2009). Effect of cross frame diaphragms on the measurements and finite element modeling of the non-composite deflections of steel plate girder bridges during construction stage. In 6th Engineering Conference College of Engineering (pp. 46–64), Baghdad, Iraq.
Morera, F. J. (2010). Lateral flange bending in heavily skewed steel bridges [Ph.D. Dissertation]. North Carolina State University, Raleigh, N.C.
Hassel, H. L., Bennett, C. R., Matamoros, A. B., & Rolfe, S. T. (2013). Parametric analysis of cross-frame layout on distortion-induced fatigue in skewed steel bridges. Journal of Bridge Engineering, 18(7), 601–611.
Fettahoglu, A. (2015). Effect of cross-beam on stresses revealed in orthotropic steel bridges. Steel and Composite Structures, 18(1), 149–163.
Said, A. I., & Lateef, H. K. (2017). Effect of curvature on the shear distribution factor for horizontally curved concrete box girder. International Journal of Science and Research, 6(12), 77–82.
Said, A. I. (2018). Experimental study for horizontally curved box girder bridges with special reference to the live load moment distribution factor. Association of Arab Universities Journal of Engineering Sciences, 25(3), 200–215.
Zhang, L. F., Wang, Y., Lei, Y. G., & Chang, Y. (2019). Analysis on live load distribution factors of widened hollow core slab bridges. In Materials science forum (Vol. 953, pp. 215–222). Trans Tech Publications Ltd.
Tabsh, S. W. (2019). Load distribution in short bridges subjected to oversize vehicles. In Australian Small Bridges Conference, 9th, 2019, Surfers Paradise, Queensland, Australia.
Al-Sherrawi, M. H., & Mahmoud, K. S. (2018). Shear and moment strength of a composite concrete beam. International Research Journal of Advanced Engineering and Science (IRJAES), 3(4), 128–132.
Liu, L., Ren, Q., & Wang, X. (2020). Calibration of the live load factor for highway bridges with different requirements of loading. Advances in Civil Engineering, 2020.
Peker, F. Ü., & İnce, R. (2020). Investigation of live load distribution factors effect in structural analysis of bridges. BEU Journal of Science, 9(3), 1297–1305.
Dong, C., Bas, S., Debees, M., Alver, N., & Catbas, F. N. (2020). Bridge load testing for identifying live load distribution, load rating, serviceability and dynamic response. Frontiers in Built Environment, 6, 46.
ANSYS Manual, 10th Ed., Release 4.1, Swanson Analysis Systems, Canonsburg, PA (2008).
El-Shihy, A. M., Fawzy, H. M., Mustafa, S. A., & El-Zohairy, A. A. (2010). Experimental and numerical analysis of composite beams strengthened by CFRP laminates in hogging moment region. Steel and Composite Structures, 10(3), 281–295.
Al-Sherrawi, M. H., & Mohammed, S. N. (2018). Shear lag in composite steel concrete beams. In 2018 1st International Scientific Conference of Engineering Sciences-3rd Scientific Conference of Engineering Science (ISCES) (pp. 169–174). IEEE.
Al-Sherrawi, M. H., & Mohammed, S. N. (2014). The effective width in composite steel concrete beams at ultimate loads. Journal of Engineering-Univ. of Baghdad, 20(8), 1–17.
American Association of State Highway and Transportation Officials. (2012). AASHTO-LRFD, Bridge Design Specifications. Washington D.C., USA.
Acknowledgements
The authors would like to gratefully present their acknowledgments to the Consulting Engineering Bureau (CEB) and the Department of Civil Engineering at the University of Baghdad for the support received to achieve this work.
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Allawi, A.A., Said, A.I., Al-Sherrawi, M.H., Albayati, A., Al Gharawi, M., El-Zohairy, A. (2022). Evaluation of Live Load Distribution Factors of a Highway Bridge. In: Karkush, M.O., Choudhury, D. (eds) Geotechnical Engineering and Sustainable Construction. Springer, Singapore. https://doi.org/10.1007/978-981-16-6277-5_43
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DOI: https://doi.org/10.1007/978-981-16-6277-5_43
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