Structural Response of Plan-Curved Steel I-Girder Bridges from an Equivalent Straight Bridge Analysis
Publication: Journal of Bridge Engineering
Volume 23, Issue 3
Abstract
A set of equations was developed to estimate the maximum mechanical elements and midspan deflections of plan-curved steel I-girder bridges. These formulas were obtained from a statistical correlation analysis based on the results of 54 tridimensional finite-element models corresponding to different 3-span continuous curved bridges. The parameters that varied from one model to another were curvature radius, span length, and number of girders (i.e., load lanes). Two different live-load models were studied separately: the HL-93 and the IMT 66.5. The proposed formulas estimate the maximum mechanical elements of girders, such as positive and negative bending moments around the major and minor axes of girders, vertical shear force, torsional moment, and deflection at the midspan of girders, as a function of the results corresponding to an equivalent straight bridge. Different formulas are proposed for interior, intermediate, and exterior girders in accordance with the bridge cross section and for central and extreme girders in accordance with the span where the girder is located. For each bridge model, the maximum mechanical elements and midspan deflections were normalized with respect to the corresponding results of an equivalent straight bridge with the same characteristics of the curved bridge (span lengths and number of girders), but with a curvature radius equal to ∞. The accuracy of the proposed formulas was tested for different bridge models considered in the correlation analysis, and the results show that they are accurate enough to be used for design purposes. In some cases, they were more accurate than current applicable formulas and procedures recommended in the literature. However, special care must be taken in the applicability of these expressions because they were obtained from models with particular characteristics.
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References
AASHTO. (1993). Guide specifications for horizontally curved highway bridges, Washington, DC.
AASHTO. (2003). Guide specifications for horizontally curved steel girder highway bridges, Washington, DC.
AASHTO. (2014). LRFD bridge design specifications, 7th Ed., Washington, DC.
Al-Hashimy, M. A. (2005). “Load distribution factors for curved concrete slab-on-steel I-girder bridges.” M.Sc. thesis, Ryerson Univ., Ontario, Canada.
Barr, P. J., Yanadori, N., Halling, M. W., and Womack, K. C. (2007). “Live-load analysis of a curved I-girder bridge.” J. Bridge Eng., 477–484.
CSA (Canadian Standard Association). (2000). Canadian highway bridge design code (CHBDC), Ontario, Canada.
CSA (Canadian Standard Association). (2006). Canadian highway bridge design code (CHBDC), Ontario, Canada.
CSiBridge [Computer software]. Computers and Structures, Inc., Berkeley, CA.
DeSantiago, E., Mohammadi, J., and Albaijat, H. (2005). “Analysis of horizontally curved bridges using simple finite-element models.” J. Pract. Period. Struct. Des. Constr., 18–21.
Fatemi, S. J., Sheikh, A. H., and Ali, M. S. M. (2015). “Development and application of an analytical model for horizontally curved bridge decks.” Adv. Struct. Eng., 18(1), 107–117.
FHWA (Federal Highway Administration). (2015). Steel bridge design handbook, Vol. 23, Washington, DC.
Hajjar, J., Krzmarzick, D., and Pallarés, L. (2010). “Measured behavior of a curved composite I-girder bridge.” J. Constr. Steel Res., 66(3), 351–368.
Khalafalla, I., and Sennah, K. (2014). “Curvature limitations for slab-on-I-girder bridges.” J. Bridge Eng., 04014031.
Kim, W. S., Laman, J. A., and Linzell, D. G. (2007). “Live load radial moment distribution for horizontally curved bridges.” J. Bridge Eng., 727–736.
Lin, W., and Yoda, T. (2010). “Analysis, design and construction of curved composite girder bridges: State-of-the-art.” Int. J. Steel Struct., 10(3), 207–220.
Linzell, D., et al. (2010). “Guidelines for analyzing curved and skewed bridges and designing them for construction.” Final Rep. for Research Project PSU-009, Pennsylvania Dept. of Transportation, Harrisburg, PA.
Linzell, D., Hall, D., and White, D. (2004). “Historical perspective on horizontally curved I girder bridge design in the United States.” J. Bridge Eng., 218–229.
Nevling, D., Linzell, D., and Laman, J. (2006). “Examination of level of analysis accuracy for curved I-girder bridges through comparisons to field data.” J. Bridge Eng., 160–168.
SCT (Secretaria de Comunicaciones y Transportes). (2001). “Ejecución de proyectos de nuevos puentes y estructuras similares, Capitulo 3 Cargas y acciones.” Norma N-PRY-CAR-6-01-003/01, Mexico City.
SSRC (Structural Stability Research Council). (1991). “A look to the future.” Rep. of Workshop on Horizontally Curved Girders, SSRC Task Group 14, Chicago, 1–18.
Zhang, H., Huang, D., and Wang, T. (2005). “Lateral load distribution in curved steel I-girder bridges.” J. Bridge Eng., 281–290.
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Published In
Journal of Bridge Engineering
Volume 23 • Issue 3 • March 2018
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Nov 18, 2016
Accepted: Aug 23, 2017
Published online: Dec 19, 2017
Published in print: Mar 1, 2018
Discussion open until: May 19, 2018
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