Computers and Concrete

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A model for the restrained shrinkage behavior of concrete bridge deck slabs reinforced with FRP bars

  • Ghatefar, Amir (Department of Civil Engineering, Urmia Branch, Islamic Azad University) ;
  • ElSalakawy, Ehab (Department of Civil Engineering, University of Manitoba) ;
  • Bassuoni, Mohamed T. (Department of Civil Engineering, University of Manitoba)
  • Received : 2016.06.15
  • Accepted : 2017.04.14
  • Published : 2017.08.25
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Abstract

A finite element model (FEM) for predicting early-age behavior of reinforced concrete (RC) bridge deck slabs with fiber-reinforced polymer (FRP) bars is presented. In this model, the shrinkage profile of concrete accounted for the effect of surrounding conditions including air flow. The results of the model were verified against the experimental test results, published by the authors. The model was verified for cracking pattern, crack width and spacing, and reinforcement strains in the vicinity of the crack using different types and ratios of longitudinal reinforcement. The FEM was able to predict the experimental results within 6 to 10% error. The verified model was utilized to conduct a parametric study investigating the effect of four key parameters including reinforcement spacing, concrete cover, FRP bar type, and concrete compressive strength on the behavior of FRP-RC bridge deck slabs subjected to restrained shrinkage at early-age. It is concluded that a reinforcement ratio of 0.45% carbon FRP (CFRP) can control the early-age crack width and reinforcement strain in CFRP-RC members subjected to restrained shrinkage. Also, the results indicate that changing the bond-slippage characteristics (sand-coated and ribbed bars) or concrete cover had an insignificant effect on the early-age crack behavior of FRP-RC bridge deck slabs subjected to shrinkage. However, reducing bar spacing and concrete strength resulted in a decrease in crack width and reinforcement strain.

Keywords

References

  1. ACI Committee 209 (2008), Guide for Modeling and Calculating Shrinkage and Creep in Hardened Concrete, ACI 209.2R-08, American Concrete Institute, Farmington Hills, Michigan, U.S.A.
  2. ACI Committee 440 (2003), Guide for the Design and Construction of Concrete Reinforced with FRP Bars, ACI 440.IR-03, American Concrete Institute, Farmington Hills, Michigan, U.S.A.
  3. ACI Committee 440 (2015), Guide for the Design and Construction of Structural Concrete Reinforced with FRP Bars, ACI 440.IR-15, American Concrete Institute, Farmington Hills, Michigan, U.S.A.
  4. Alves, J., El-Ragaby, A. and El-Salakawy, E. (2011), "Durability of GFRP bars bond to concrete under different loading and environmental conditions", J. Compos. Constr., 15(3), 249-262. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000161
  5. ASTM Standards (ASTM E-831) (2013), "Standard test method for linear thermal expansion of solid materials by thermomechanical analysis", ASTM International (ASTM E831-13), U.S.A.
  6. Au, F.T.K., Liu, C.H. and Lee, P.K.K. (2007), "Shrinkage analysis of reinforced concrete floors using shrinkage-adjusted elasticity modulus", Comput. Concrete, 4(6), 437-456. https://doi.org/10.12989/cac.2007.4.6.437
  7. Baena, M., Turon, A., Torres, L. and Mias, C. (2011), "Experimental study and code predictions of fibre reinforced polymer reinforced concrete (FRP-RC) tensile members", Compos. Struct., 93, 2511-2527. https://doi.org/10.1016/j.compstruct.2011.04.012
  8. Canadian Standards Associations (CSA) (2006), Canadian Highway Bridge Design Code-CHBDC, CAN/CSA-S6-06, Toronto, Canada.
  9. Canadian Standards Associations (CSA) (2012), Design and Construction of Building Structures with Fibre-Reinforced Polymers, A National Standard of Canada (CSA/S806-12), Canadian Standards Association, Toronto, Canada.
  10. CEB-FIP (1990), Model Code for Concrete Structures, Comite Europeen du beton, Paris, France.
  11. CEB (1999), Structural Concrete: Behaviour, Design and Performance, Updated Knowledge of the CEB-FIP Model Code 1990, fib Bulletin 2, Federation International du Beton, Lausanne, Switzerland, 37-52.
  12. Cervenka, V. and Niewald, J. (2005), ATENA-FEMAP User's Guide, Cervenka Consulting Ltd., Prague, Czech Republic.
  13. Cervenka, V., Jendele, L. and Cervenka, J. (2012), ATENA Program Documentation, Part 1: Theory, Cervenka Consulting Ltd., Prague, Czech Republic.
  14. Chen, H.J., Liu, T. and Tang, C. (2008), "Numerical modeling of drying shrinkage behavior of self-compacting concrete", Comput. Concrete, 5(5), 435-448. https://doi.org/10.12989/cac.2008.5.5.435
  15. Frosch, R., Brice, J. and Ericson, J. (2006), Design Methods for the Control of Restrained Shrinkage Cracking, Final Report, Joint Transportation Research Program, Project no. C-36-56MMM, File No. 7, 4-63.
  16. Ghatefar, A., El-Salakawy, E. and Bassuoni, M. (2014), "Effect of reinforcement ratio on transverse early-age cracking of GFRPRC bridge deck slabs", J. Compos. Constr., 18(6), 04014018. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000479
  17. Gilbert, R.I. (1992), "Shrinkage cracking in fully restrained concrete members", ACI Struct. J., 89(2), pp. 141-149.
  18. Hadidi, R. and Saadeghvaziri, M.A. (2005), "Transverse cracking of concrete bridge decks: State-of-the-art", J. Bridge Eng., 10(5), 503-510. https://doi.org/10.1061/(ASCE)1084-0702(2005)10:5(503)
  19. ISIS Canada (2007), Reinforcing Concrete Structures with Fibre Reinforced Polymers, The Canadian Network for Centers of Excellence on Intelligent Sensing for Innovative Structures (ISIS-M03-07), Winnipeg, MB, Canada.
  20. Koenigsfeld, D. and Myers, J.J. (2003), Secondary Reinforcement for Fibre Reinforced Polymers Reinforced Concrete Panels, Center for Infrastructure Engineering Studies (CIES 03-45), University of Missouri, Missouri, Rolla.
  21. Kwan, A.K.H. and Ng, P.L. (2009), "Shrinkage movement analysis of reinforced concrete floors constructed in stages", Comput. Concrete, 6(2), 167-185. https://doi.org/10.12989/cac.2009.6.2.167
  22. Lozano-Galant, J.A. and Turmo, J. (2014), "Creep and shrinkage effects in service stresses of concrete cable-stayed bridges", Comput. Concrete, 13(4), 483-499. https://doi.org/10.12989/cac.2014.13.4.483
  23. Malvar, L.J., Cox, J.V. and Cochran, K.B. (2003), "Bond between carbon fiber reinforced polymer bars and concrete. I: Experimental study", J. Compos. Constr., 7(2), 154-163. https://doi.org/10.1061/(ASCE)1090-0268(2003)7:2(154)
  24. Mazaheripour, H., Barros, J.A.O., Sena-Cruz, J.M., Pepe, M. and Martinelli, E. (2013), "Experimental study on bond performance of GFRP bars in self-compacting steel fiber reinforced concrete", J. Compos. Struct., 95, 202-212. https://doi.org/10.1016/j.compstruct.2012.07.009
  25. Mehta, P.K. and Montherio, P.J.M. (2014), Concrete: Microstructure, Properties, and Materials, McGraw Hill, New York, U.S.A.
  26. Mias, C., Torres, L., Turon, A. and Barris, C. (2013), "Experimental study of immediate and time-dependent deflections of GFRP reinforced concrete beams", J. Compos. Struct., 96, 279-285. https://doi.org/10.1016/j.compstruct.2012.08.052
  27. Minnetyan, L. (2011), Tool for Analysis of Early Age Transvers Cracking of Composite Bridge Decks, Final report, Joint Transportation Research Program, Project No. SPR-06-37(C-06-37), Clarkson University, New York, U.S.A.
  28. Myers, C. (1982), Survey of Cracking on Underside of Classes B-1 and B-2 Concrete Bridge Decks in District 4, Investigation No. 82-2, Division of Material and Research, Missouri Highway and Transportation Department, Jefferson, Missouri, U.S.A.
  29. Ramey, G.E., Wolff, A.R. and Wright, R.L. (1997), "Structural design actions to mitigate bridge deck cracking", Prac. Period. Struct. Des. Constr., 2(3), 118-124. https://doi.org/10.1061/(ASCE)1084-0680(1997)2:3(118)
  30. RILEM Technical Committee (1988), Material Models for Structural Creep Analysis, Chapter 2 in Mathematical Modeling of Creep and Shrinkage of Concrete, 99-215, New York, U.S.A.
  31. Sooriyaarachchi, H., Polakoutas, K. and Byars, F. (2005), "Tension stiffening behavior of GFRP-reinforced concrete", Proceedings of the 7th International Symposium on Fiber-Reinforced Polymer (FRP) Reinforcement for Concrete Structures (FRPRCS-7), Kansas, Missouri, U.S.A., November.
  32. Zhang, J., Gao, Y., Han, Y. and Sun, W. (2012), "Shrinkage and interior humidity of concrete under dry-wet cycles", J. Dry. Technol., 30(6), 583-596. https://doi.org/10.1080/07373937.2011.653614

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