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Simulation of the behaviour of RC columns strengthen with CFRP under rapid loading

  • Esfandiari, Soheil (Department of Civil Engineering, College of Engineering, Sistan and Balouchestan University) ;
  • Esfandiari, Javad (Department of Civil Engineering, College of Engineering, Kermanshah Branch, Islamic Azad University of Kermanshah)
  • Received : 2016.03.05
  • Accepted : 2017.01.16
  • Published : 2016.12.25
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Abstract

In most cases strengthening reinforced concrete columns exposed to high strain rate is to be expected especially within weak designed structures. A special type of loading is instantaneous loading. Rapid loading can be observed in structural columns exposed to axial loads (e.g., caused by the weight of the upper floors during a vertical earthquake and loads caused by damage and collapse of upper floors and pillars of bridges).Subsequently, this study examines the behavior of reinforced concrete columns under rapid loading so as to understand patterns of failure mechanism, failure capacity and strain rate using finite element code. And examines the behavior of reinforced concrete columns at different support conditions and various loading rate, where the concrete columns were reinforced using various counts of FRP (Fiber Reinforcement Polymer) layers with different lengths. The results were compared against other experimental outcomes and the CEB-FIP formula code for considering the dynamic strength increasing factor for concrete materials. This study reveals that the finite element behavior and failure mode, where the results show that the bearing capacity increased with increasing the loading rate. CFRP layers increased the bearing capacity by 20% and also increased the strain capacity by 50% through confining the concrete.

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References

  1. AASHTO LRFD Bridge Design Specification (2012), American Association of State Highway and Transportation Officials.
  2. Abrams, D.A. (1917), "Effect of rate of application of load on the compressive strength of concrete", ASTM J., 17(2), 70-78.
  3. Bertero V.V. (1972), "Experimental studies concerning reinforced, prestressed and partially prestressed concrete structures and their elements", Proceedings of the Symposium on Resistance and Ultimate Deformability of Structures Acted on by Well Defined Repeated Loads, International Association for Bridge and Structural Engineering, Lisbon, Portugal.
  4. Bischoff, P.H. and Perry, S.H. (1991), "Compressive behavior of concrete at high strain rates", Mater. Struct., 24(6), 425-450. https://doi.org/10.1007/BF02472016
  5. Comite euro-international du beton (1990). CEB-FIB Model Code: Design Code, Thomas Telford, London, U.K.
  6. Design Guide of High Strength Concrete (2008), BCA Sustainable Construction Series-3.
  7. Iwai, S., Minam, K. and Wakabayashi, M. (1988), "Stability of slender reinforced concrete members subjected to static and dynamic loads", Proceedings of the Ninth World Conference on Earthquake Engineering, 3, 901-906.
  8. Kachlakev, D., Miller, T., Yim, S., Chansawat, K. and Potisuk, T. (2001), "Finite element modeling of concrete structures strengthened with FRP laminates", Final Report, SPR, 316.
  9. Kim, S.E. and Nguyen, H.T. (2009), "Finite element modeling of push-out tests for large stud shear connectors", J. Constr. Steel Res., 65(10), 1909-1920. https://doi.org/10.1016/j.jcsr.2009.06.010
  10. Li, S., Xiaoran, L. and Yuanfeng, W. (2016), "Experimental study and modelling of CFRP-confined damaged and undamaged square RC columns under cyclic loading", J. Steel Compos. Struct., 21(2), 411-427. https://doi.org/10.12989/scs.2016.21.2.411
  11. Malvar, L. and Ross, C. (1998), "Review of strain rate effects for concrete in tension", ACI Mater. J., 95(6), 735-739.
  12. Mehta, P.K. (2000), "High strength concrete", Mont. Micro-Struct., Propert. Mater.
  13. Orozco, G.L. and Ashford, S.A. (2002), "Effects of large velocity pulses on reinforced concrete bridge columns", PEER Report.
  14. Pajak, M. (2011), "The influence of the strain rate on the strength of concrete taking into account the experimental techniques", Architect. Civil Eng. Environ., 4, 77-86.
  15. Reinchmidt, K.F., Hansen, R.J. and Yang, C.Y. (1964), "Dynamic tests of reinforced concrete columns", ACI J. Proc., 61(3), 317-334.
  16. Simulia, D. (2011), Analaysis User's Manual Abaqus 6.11, Volume III: Materials, 22-2.
  17. Tagami, J., Suzuki, N., Kaneko, T. and Maruta, M. (2005), "Dynamic loading test of reinforced concrete columns for identification of strain rate effect", Proceedings of the First NEES/E-Defense Workshop on Collapse Simulation of Reinforced Concrete Building Structures, Pacific Earthquake Engineering Research Center, Berkeley, California, U.S.A.
  18. Wee, T.H., Chin, M.S. and Mansur, M.A. (1996), Stress-strain relationship of high-strength concrete in compression", J. Mater. Civil Eng., 8(2), 70-76. https://doi.org/10.1061/(ASCE)0899-1561(1996)8:2(70)
  19. Zeng, X., Xu, B. and Zhang, X.Z. (2012), "Experimental study on axial compression behavior of RC columns under rapid loadings", Proceedings of the 15WCEE, Lisboa, Portugal.

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