Performance of Stud Clusters in Precast Bridge Decks

Chang-Su Shim, Dong-Wook Kim, Mai Xuan Nhat

Abstract


A new design approach to clustered stud shear connection in composite bridges with precast decks is required to accommodate highly concentrated shear force in small area. Shear connection of the prefabricated slab consists of stud connectors, mortar in a shear pocket and reinforcement around the pocket. More general design approach for the shear connection is provided by relative strength between shear strength of shear connectors, bearing strength of mortar in shear pockets, and the shear strength of precast deck. Considering the relatively high strength mortar in the bearing zone of the shear connection this paper deals with structural performance of stud clusters to simplify the connection details. In a shear pocket, closer stud spacing than the current pitch requirement was considered. Push-out tests were conducted to evaluate the ultimate strength according to expected failure modes. The main parameters of the test were stud spacing and confining details. In order to use group arrangement of stud connectors, it is necessary to prevent premature failure of bearing zone by strengthening the shear connection using confining reinforcements. An empirical equation of ultimate shear strength of the shear connection was proposed to consider the effect of stud spacing when the spacing is less than five times stud diameter. Fatigue tests showed that the fatigue endurance of clustered stud connectors with spacing of more than three times stud diameter can be evaluated using current design codes.

Keywords:
shear connection; precast deck; stud cluster; stud spacing; ultimate shear strength; fatigue endurance

Full Text:

 PDF

References


Badie, S.; Tadros, M. K.; Kakish, H. F.; Splittgerber, D. L.; Baishya, M. C. 2002. Large Shear Studs for Composite Action in Steel Bridge Girders, Journal of Bridge Engineering 7(3): 195–203. http://dx.doi.org/10.1061/(ASCE)1084-0702(2002)7:3(195)

Hanswille, G.; Porsch, M.; Ustundag, C. 2007. Resistance of Headed Studs Subjected to Fatigue Loading Part I: Experimental Study, Journal of Constructional Steel Research 63(4): 475–484. http://dx.doi.org/10.1016/j.jcsr.2006.06.035

Larose, K. E. 2006. Performance of Shear Stud Clusters for Precast Concrete Bridge Deck Panels. Master Thesis 2006. University of British Columbia. 151 p.

Lee, P. G.; Shim, C. S.; Chang, S. P. 2005. Static and Fatigue Behavior of Large Stud Shear Connectors for Steel-Concrete Composite Bridges, Journal of Constructional Steel Research 61(9): 1270–1285. http://dx.doi.org/10.1016/j.jcsr.2005.01.007

Marčiukaitis, G.; Valivonis, J.; Jonaitis, B.; Kleiza, J.; Šalna, R. 2013. Determination of Stiffness of the Connections of Composite Steel and Concrete Bridge Deck by the Limit Permissible Deflections, The Baltic Journal of Road and Bridge Engineering 8(1): 1–9. http://dx.doi.org/10.3846/bjrbe.2013.01

Oehlers, D. J.; Bradford, M. A. 1995. Composite Steel @ Concrete Structural Members: Fundamental Behavior. 1st edition. Oxford: Pergamon Press, 588 p. ISBN 0080419194.

Okada, J.; Yoda, T.; Lebet, J.-P. 2006. A Study of the Grouped Arrangements of Stud Connectors on Shear Strength Behavior, Journal of Structural Mechanics and Earthquake Engineering 23(1): 75–89. http://dx.doi.org/10.2208/jsceseee.23.75s

Shim, C. S.; Chung, C. H.; Kim, I. K.; Kim, Y. J. 2010. Development and Application of Precast Decks for Composite Bridges, Structural Engineering International 20(2): 126–133. http://dx.doi.org/10.2749/101686610791283623

Shim, C. S.; Kim, D. W. 2010. Structural Performance of Composite Joints Using Bent Studs, International Journal of Steel Structures 10(1): 1–13. http://dx.doi.org/10.1007/BF03249508

Shim, C. S.; Park, J. S.; Jeon, S. M.; Kim, D. W. 2007. Experimental Study on Group Stud Shear Connection, in Proc. of 5th International Conference on Advances in Steel Structures, vol. 3. Ed. by Richard, J. Y.; Choo, Y. S. December 5–7, 2007, Singapore: Research Publishing, 932–937.

Shim, C. S.; Lee, P. G.; Yoon, T. Y. 2004. Static Behavior of Large Stud Shear Connectors, Engineering Structures 26(12): 1853– 1860. http://dx.doi.org/10.1016/j.engstruct.2004.07.011

Shim, C. S.; Chang, S. P. 2003. Cracking of Continuous Composite Beams with Precast Decks, Journal of Constructional Steel Research 59(2): 201–214. http://dx.doi.org/10.1016/S0143-974X(02)00032-9

Shim, C. S.; Chang, S. P.; Lee, P. G. 2001. Design of Shear Connection in Composite Steel and Concrete Bridges with Precast Decks, Journal of Constructional Steel Research 57(3): 203– 219. http://dx.doi.org/10.1016/S0143-974X(00)00018-3

Shim, C. S.; Kim, J. H.; Chung, C. H.; Chang, S. P. 2000. The Behavior of Shear Connection in Composite Beam with Full- Depth Precast Slab, Structures and Buildings, the Institution of Civil Engineers 140(1): 101–110. http://dx.doi.org/10.1680/stbu.2000.140.1.101

Tsujimura, T.; Shoji, A.; Noro, T.; Muroi, S. 2002. Experimental Study on a Joint in Prestressed Concrete Bridge with Steel Truss Web, in Proc. of the 1st Congress, Composite Structures Ed. by Japan Prestressed Concrete Engineering Association. October 13–19, 2002, Osaka: Osaka Prefectural Government, 347–352.




DOI: 10.3846/bjrbe.2014.06

Refbacks

  • There are currently no refbacks.


Copyright (c) 2014 Vilnius Gediminas Technical University (VGTU) Press Technika