Curvature Limitations for Slab-on-I-Girder Bridges
Publication: Journal of Bridge Engineering
Volume 19, Issue 9
Abstract
In recent years, horizontally curved bridges have been widely used in congested urban areas, where multilevel interchange structures are necessary for modern highways. In bridges with light curvature, the curvature effects on bending, shear, and torsional stresses may be ignored if they are within an acceptable range. Treating horizontally curved bridges as straight bridges with certain limitations is one of the methods to simplify the design procedure. Bridge design specifications and codes have specified certain limitations to treat horizontally curved bridges as straight bridges. However, these limitations do not differentiate between bridge cross section configurations, in addition to being inaccurate in estimating the structural response. Moreover, these specifications were developed primarily for the calculation of girder bending moments. To investigate the accuracy of these limitations, a series of horizontally curved, braced concrete slab-over steel I-girder and slab-on-concrete I-girder bridges were analyzed, using three-dimensional finite-element modeling, to investigate their behavior under dead loading. The major internal forces developed in the members were determined, namely, girder longitudinal bending stresses, vertical deflections, vertical support reactions, and bridge fundamental flexural frequencies for different degrees of curvature, span length, bridge width, and span continuity. Empirical equations for these straining actions were developed as a function of those for straight bridges. The stipulations made in bridge codes for treating a curved bridge as a straight bridge were then correlated with the obtained values from the finite-element modeling. Results proved that such code limitations were unsafe. Based on the data generated from this parametric study, sets of empirical expressions were developed to determine such limitations more accurately and reliably.
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Acknowledgments
The support of Natural Sciences and Engineering Research Council of Canada Discovery Grant to this research is very much appreciated.
References
AASHTO. (1993). Guide specification for horizontally curved highway bridges, Washington, DC.
AASHTO. (2003). Guide specification for horizontally curved highway bridges, Washington, DC.
AASHTO. (2006). AASHTO-LRFD bridge design specifications, Washington, DC.
Al-Hashimy, M. (2005). “Load distribution factors for curved concrete slab-on-steel I-girder bridges.” M.A.Sc. thesis, Civil Engineering Dept., Ryerson Univ., Toronto.
American Concrete Institute (ACI). (1995). “Analysis and design of reinforced concrete bridge structures.” ACI 343R-95, Farmington Hills, MI.
Androus, A. (2003). “Experimental and theoretical studies of composite multiple-box girder bridges.” M.A.Sc. thesis, Civil Engineering Dept., Ryerson Univ., Toronto.
Canadian Standards Association (CSA). (2006a). “Canadian highway bridge design code.” CAN/CSA-06-06, Toronto.
Canadian Standards Association (CSA). (2006b). “Commentaries on the Canadian highway bridge design code.” CAN/CSA-06-06, Toronto.
Granata, M., Margiotta, P., and Arici, M. (2013). “A parametric study of curved incrementally launched bridges.” Eng. Struct., 49, 373–384.
Hassan, W. (2008). “Shear distribution in curved composite multiple-box girder bridges.” M.A.Sc. thesis, Civil Engineering Dept., Ryerson Univ., Toronto.
Hibbitt, D., Karlsson, I., and Sorenson, J. (2006). ABAQUS user’s manual version 6.6, Hibbitt, Karlsson, and Sorenson Inc., Providence, RI.
Khalafalla, I. (2009). “Curvature limitations in bridge codes.” M.A.Sc. thesis, Dept. of Civil Engineering, Ryerson Univ., Toronto.
Lavelle, F. H., and Laska, R. J. (1975). “Parameter studies of horizontally curved highway bridges.” CURT Technical Rep. No. 6(L), Research Project HPR-2(111), Univ. of Rhode Island, Providence, RI.
Logan, D. (2002). A first course in the finite element method, 3rd Ed., Brooks/Cole Publisher, Pacific Grove, CA.
Ministry of Transportation of Ontario (MTO). (1992). Ontario Highway Bridge Design Code, OHBDC, 3rd Ed., Ontario Ministry of Transportation and Communications, Downsview, ON, Canada.
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
Nour, S. (2001). “Load distribution in curved composite concrete deck-steel multiple-spine box girder bridges.” M.A.Sc. thesis, Dept. of Civil and Environmental Engineering, Univ. of Windsor, Windsor, ON, Canada.
Nutt, Redfield, and Valentine. (2008). “Development of design specifications and commentary for horizontally curved concrete box-girder bridges.” NCHRP Rep. 620, Project 12-71, National Cooperative Highway Research Program, Transportation Research Board, Washington, DC.
Samaan, M. (2006). “Dynamic and static analyses of continuous curved composite multiple-box girder bridges.” Ph.D. dissertation, Dept. of Civil and Environmental Engineering, Univ. of Windsor, Windsor, ON, Canada.
Samaan, M., Sennah, K., and Kennedy, J. (2002). “Positioning of bearings for curved continuous spread-box girder bridges.” Can. J. Civ. Eng., 29(5), 641–652.
Sennah, K., and Kennedy, J. (1997). “Dynamic characteristics of simply-supported curved composite multi-cell bridges.” Can. J. Civ. Eng., 24(4), 621–636.
Sennah, K., and Kennedy, J. (2001). “State of the art in design of curved box-girder bridges.” J. Bridge Eng., 159–167.
Zhang, H. (2002). “Lateral load distribution for curved steel I-girder bridges.” Ph.D. dissertation, Florida International Univ., Miami.
Zureick, A., Naqib, R., and Yadlosky, J. M. (1994). “Curved steel bridge research project, Volume. I.” Interim Rep. FHWA-RD-93-129, Federal Highway Administration, Washington, DC.
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© 2014 American Society of Civil Engineers.
History
Received: Sep 16, 2013
Accepted: Jan 14, 2014
Published online: Feb 21, 2014
Discussion open until: Jul 21, 2014
Published in print: Sep 1, 2014
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