Modeling the Shear Connection in Adjacent Box-Beam Bridges with Ultrahigh-Performance Concrete Joints. II: Load Transfer Mechanism
Publication: Journal of Bridge Engineering
Volume 22, Issue 8
Abstract
Ultrahigh-performance concrete (UHPC), with its enhanced strength and durability, has been proposed as the joint material in adjacent box-beam bridges to address the issue of longitudinal cracking. Recently, the Federal Highway Administration (FHWA) performed laboratory testing of two adjacent box beams connected by a UHPC shear key containing transverse shear reinforcement bars (SRBs), and the results suggest that an improvement in the overall performance of adjacent box-beam bridges may be achieved by using the new shear key design. However, there is no information about the load transfer mechanism within the new connection. The aim of this research is to perform finite-element (FE) analysis of the two adjacent box-beam models to investigate the load transfer mechanism in, and ultimate load capacity of, the new FHWA shear key design. The three-dimensional FE model used in the study was validated based on the FHWA laboratory test results. The model is used to identify the roles of the UHPC material, the transverse SRBs, and the shear key surface roughness on the load transfer mechanism between adjacent box beams at different load levels, and to investigate the suitability of widely accepted criteria for shear key condition/performance for the new shear key design. The results of the analysis show that a shear key with a smooth surface and minimum transverse SRBs is sufficient for load transfer between adjacent box beams for the load level used in the FHWA testing and that a shear key with a sandblasted surface and minimum transverse SRBs is capable of transferring load up to failure of the box-beam system. The results of the analysis provide valuable useful insight into the shear key behavior, which can be used to optimize the design of future UHPC shear keys.
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Acknowledgments
The authors thank members of the Federal Highway Administration (FHWA) Turner-Fairbank Highway Research Center (TFHRC), including Dr. Benjamin Graybeal and Dr. JiQiu Yuan, who were a vital part of this research.
References
AASHTO. (2012). LRFD Bridge design specifications, 6th Ed., Washington, DC.
Abaqus 6.12-3 [Computer software]. Dassault Systèmes SIMULIA, Providence, RI.
Attanayake, U., and Aktan, H. (2015). “First-generation ABC system, evolving design, and half a century of performance: Michigan side-by-side box-beam bridges.” J. Perform. Constr. Facil., 04014090.
El-Remaily, A., Tadros, M. K., Yamane, T., and Krause, G. (1996). “Transverse design of adjacent precast prestressed concrete box girder bridges.” PCI J., 41(4), 96–113.
fib (International Federation of Structural Concrete). (2008). “Structural connections for precast concrete buildings.” Bulletin 43, Lausanne, Switzerland.
Grace, N., Jensen, E., and Noamesi, D. (2011a). “Flexural performance of carbon fiber-reinforced polymer prestressed concrete side-by-side box beam bridge.” J. Compos. Constr., 663–671.
Grace, N. F., Jensen, E. A., and Bebawy, M. R. (2012). “Transverse post-tensioning arrangement for side-by-side box-beam bridges.” PCI J., 57(2), 48–63.
Grace, N. F., Jensen, E. A., Enomoto, T., Matsagar, V. A., Soliman, E. M., and Hanson, J. Q. (2010). “Transverse diaphragms and unbonded CFRP post-tensioning in box-beam bridges.” PCI J., 55(2), 109–122.
Grace, N. F., Patki, K. D., Soliman, E. M., and Hanson, J. Q. (2011b). “Flexural behavior of side-by-side box-beam bridges: A comparative study.” PCI J., 56(3), 94–112.
Gulyas, R. J., and Champa, J. T. (1997). “Use of composite testing for evaluation of keyway grout for precast prestressed bridge beams.” ACI Mater. J., 94(3), 244–250.
Gulyas, R. J., Wirthlin, G. J., and Champa, J. T. (1995). “Evaluation of keyway grout test methods for precast concrete bridges.” PCI J., 40(1), 44–57.
Hanna, K. E., Morcous, G., and Tadros, M. K. (2007). “Transverse design and detailing of adjacent box beam bridges.” Proc., PCI National Bridge Conf., Precast/Prestressed Concrete Institute, Chicago, 22–24.
Hanna, K. E., Morcous, G., and Tadros, M. K. (2009). “Transverse post-tensioning design and detailing of precast, prestressed concrete adjacent-box-girder bridges.” PCI J., 54(4), 160–174.
Huckelbridge, A., El-Esnawi, H., and Moses, F. (1995). “Shear key performance in multibeam box girder bridges.” J. Perform. Constr. Facil., 271–285.
Huckelbridge A. A., and El-Esnawi, H. H. (1997). “Evaluation of improved shear-key designs for multi-beam box girder bridges.” Final Rep. No. FHWA/OH/97-009, Dept. of Civil Engineering, Case Western Reserve Univ., Cleveland.
Hussein, H., Walsh, K., Sargand, S., and Steinberg, E. (2016). “Interfacial properties of ultrahigh-performance concrete and high-strength concrete bridge connections.” J. Mater. Civ. Eng., 04015208.
Hussein, H. H., Walsh, K. K., Sargand, S. M., Al Rikabi, F. T., and Steinberg, E. P. (2017). “Modeling the shear connection in adjacent box-beam bridges with ultrahigh-performance concrete joints. I: Model calibration and validation.” J. Bridge Eng., 04017043.
Miller, R. A., Hlavacs, G. M., Long, T., and Greuel, A. (1999). “Full-scale testing of shear keys for adjacent box girder bridges.” PCI J., 44(6), 80–90.
Miller, R. A., Swanson, J. A., Engel, R., Nusairat, J., Walters, R., and Barnhart, J. (2009). “Evaluation of the effectiveness of the strategic initiative 9 pilot bridge concepts.” FHWA/OH-2009/10, Ohio DOT, Columbus, OH.
Russell, H. G. (2009). Adjacent precast concrete box beam bridges: Connection details, Transportation Research Board, Washington, DC.
Santos, P. M., and Júlio, E. N. B. S. (2014). “Interface shear transfer on composite concrete members.” ACI Struct. J., 111(1), 113–121.
Yuan, J., and Graybeal, B. (2016). “Full-scale testing of shear key details for precast concrete box-beam bridges.” J. Bridge Eng., 04016043.
Zilch, K., and Reinecke, R. (2000). “Capacity of shear joints between high-strength precast elements and normal-strength cast-in-place decks.” Proc., PCI/FHWA/FIB Int. Symp. on High Performance Concrete, Precast/Prestressed Concrete Institute, Chicago.
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Information
Published In
Journal of Bridge Engineering
Volume 22 • Issue 8 • August 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Nov 10, 2016
Accepted: Feb 23, 2017
Published online: Jun 6, 2017
Published in print: Aug 1, 2017
Discussion open until: Nov 6, 2017
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