Bond Behavior of Embedded Reinforcing Steel Bars for Varying Levels of Transversal Pressure
Publication: Journal of Performance of Constructed Facilities
Volume 30, Issue 2
Abstract
Because of columns loads, reinforced concrete (RC) continuous beams in skeleton structures are subjected to transverse compressive stress at support locations. Such lateral pressure can enhance the bond between the main top reinforcing bars and the surrounding concrete because of the confinement effect. Thus, the development length can be reasonably decreased compared to the case of no lateral pressure. However, different codes of practice, such as the Egyptian code standard ECP 203-2007 and the American Concrete Institute (ACI) code standard ACI 318-11, stipulate increasing the reinforcement location factor for upper reinforcement implemented in the calculation of the development length of such bars. On the other hand, the Comite Euro-International du Béton (CEB-FIP) model code standard CEB-FIP 2010 considers this enhancement in bond stress calculations as being due to transverse compression stress. To assess such effects, pull-out tests were performed on reinforcing bars embedded in short RC columns subjected to different levels of axial pressure. The experimental findings showed the same trend as manifested in the CEB-FIP 2010 results, where increasing the lateral pressure on the reinforcing bar resulted in decreasing the development length for both smooth and deformed steel bars. In contrast, the results of development length calculations based on both ECP 203-2007 and ACI 408R-03 were constant regardless of the level of lateral pressure on the reinforcing bar. This highlights the need for both ECP 203-2007 and ACI 408R-03 to consider the effect of transverse lateral pressure on development length calculations due to varying lateral pressure on the reinforcing bar.
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References
ACI (American Concrete Institute). (2003). “Bond and development of straight reinforcing bars in tension.”, Farmington Hills, MI.
ACI (American Concrete Institute). (2011). “Building code requirements for structural concrete and commentary.”, Farmington Hills, MI.
Arel, H. S., and Yazici, S. (2012). “Concrete reinforcement bond in different concrete classes.” Constr. Build. Mater., 36, 78–83.
Atorod, A., Stark, M., Roller, J. J., and Ghosh, S. K. (1993). “Bond performance of reinforcing bars embedded in high-strength concrete.” ACI Struct. J., 90(5), 554–561.
Casanova, A., Jason, L., and Davenne, L. (2012). “Bond slip model for the simulation of reinforced concrete structures.” Eng. Struct., 39(6), 66–78.
Chao, S. H., Naaman, A. E., and Montesinos, G. P. (2009). “Bond behaviour of reinforcing bars in tensile strain hardening fibre reinforced cementitious composites.” ACI Struct. J., 106(6), 897–907.
Comite Euro-international du béton/Fédération internationale du béton(CEB-FIP). (2010). Model Code for Concrete Structures: CEB-FIP International Recommendations, Paris.
Cox, J. V. (1994). “Development of a plasticity bond model for reinforced concrete—Theory and validation for monotonic applications.” Naval Facilities Engineering Service Center, Port Hueneme, CA.
Dominguez, N., Brancherie, D., Davenne, L., and Ibrahimbegovic, A. (2005). “Prediction of crack pattern distribution in reinforced concrete by coupling a strong discontinuity model of concrete cracking and a bond-slip of reinforcement model.” Int. J. Comput. -Aided Eng. Software, 22(5–6), 558–582.
ECP (Egyptian Code of Practice). (2007). “Egyptian code for design and construction of reinforced concrete structures.”, Housing and Building Research Centre, Cairo.
Eligehausen, R., Popov, E. P., and Bertero, V. V. (1983)., Earthquake Engineering Research Center, Univ. of California, Berkeley, CA.
Ferguson, P. M., and Breen, J. E. (1965). “Lapped spliced for high strength reinforced bars.” ACI Struct. J., 62(9), 1063–1078.
Gambarova, P., and Karakoc, C. (1982). “Shear confinement interaction at the bar to concrete interface.” Proc., Bond in Concrete International Conf., Peisley College of Technology, P. Bartos, ed., Applied Science, Paisley, Scotland, 82–96.
Gerstle, W. H., and Ingraffea, A. R. (1990). “Does bond-slip exist?” Proc., Int. Conf. on Micromechanics of Failure of Quasi-Brittle Materials, Elsevier, Albuquerque, NM, 407–416.
Goto, Y. (1971). “Cracks formed in concrete around deformed tension bars.” ACI Struct. J., 68(4), 244–251.
Gylltoft, K. (1983). “Fracture mechanics models for fatigue in concrete structures.” Ph.D. thesis, Luleå Univ. of Technology, Lulea, Sweden.
Ibrahimbegovic, A., Boulkertous, A., Davenne, L., and Brancherie, D. (2010). “Modelling of reinforced-concrete structures providing crack spacing based on XFEM, EDFEM and novel operator split solution procedure.” Int. J. Numer. Methods Eng., 83(4), 452–481.
Ichinose, T., Kanayama, Y., Inoue, Y., and Bolander, J. E., Jr. (2004). “Size effect on bond strength of deformed bars.” Constr. Build. Mater., 18(7), 549–558.
Jeanty, P. R., Mitchell, D., and Mirza, M. S. (1988). “Investigation of ‘Top bar’ effects in beams.” ACI Struct. J., 85(3), 251–257.
Lowes, L. N., Moehle, J. P., and Govindjee, S. (2004). “Concrete-steel bond model for use in finite element modelling of reinforced concrete structures.” ACI Struct. J., 101(4), 501–511.
Lutz, L. A., and Gergely, P. (1967). “Mechanics of bond and slip of deformed bars in concrete.” ACI Struct. J., 64(11), 711–721.
Mainz, J. (1993). “Modeling of composite structures-behavior of Rebar.”, Technical Univ., Munich, Germany.
Monti, G., Filippou, F. C., and Spacone, E. (1997). “Analysis of hysteretic behaviour of anchored reinforcing bars.” ACI Struct. J., 94(2), 248–261.
Reinhardt, H. W., Blaauwendraad, J., and Vos, E. (1984). “Prediction of bond between steel and concrete by numerical analysis.” Mater. Struct., RILEM, 17(100), 311–320.
Richard, B., Ragueneau, F., Cremona, C., Adélaide, L., and Tailhan, J. L. (2010). “A three dimensional steel/concrete interface model including corrosion effects.” Eng. Fract. Mech., 77(6), 951–973.
Tassios, T. P. (1979). “Properties of bond between concrete and steel under load cycles idealizing seismic actions.” AICAP-CEB Symp., State of the Art Rep. (CEB Bulletin d’Information No. 131), Vol. 1, Rome, 67–122.
Uijl, J., and Bigaj, A. J. (1996). “A bond model for ribbed bars based on concrete confinement.” HERON, 41(3), 201–226.
Valcuende, M., and Parra, C. (2009). “Bond behaviour of reinforcement in self compacting concretes.” Constr. Build. Mater., 23(1), 162–170.
Xu, F., Wu, Z., Zheng, J., Hu, Y., and Li, Q. (2014). “Bond behaviour of plain round bars in concrete under complex lateral pressures.” ACI Struct. J., 111(1), 15–25.
Yerlici, V. A., and Ozturan, T. (2000). “Factors affecting anchorage bond strength in high performance concrete.” ACI Struct. J., 97(3), 499–507.
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Published In
Journal of Performance of Constructed Facilities
Volume 30 • Issue 2 • April 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Aug 6, 2014
Accepted: Mar 5, 2015
Published online: Apr 9, 2015
Discussion open until: Sep 9, 2015
Published in print: Apr 1, 2016
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