Coupled systems mechanics

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Coupling of nonlinear models for steel-concrete interaction in structural RC joints

  • Dominguez, Norberto (Department of Postgraduate and Research Studies (SEPI) ESIA UZ National Polytechnic Institute of Mexico) ;
  • Perez-Mota, Jesus (Department of Postgraduate and Research Studies (SEPI) ESIA UZ National Polytechnic Institute of Mexico)
  • Received : 2014.03.25
  • Accepted : 2014.06.03
  • Published : 2014.06.25
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Abstract

When strong seismic forces act on reinforced concrete structures, their beam-column connections are very susceptible to damage during the earthquake event. The aim of this numerical work is to evaluate the influence of the internal steel reinforcement array on the nonlinear response of a RC beam-column connection when it is subjected to strong cyclic loading -as a seismic load. For this, two specimens (extracted from an experimental test of 12 RC beam-column connections reported in literature) were modeled in the Finite Element code FEAP considering different stirrup's arrays. In order to evaluate the nonlinear response of the RC beam-column connection, the 2D model takes into account the nonlinear thermodynamic behavior of each component: for concrete, a damage model is used; for steel reinforcement, it is adopted a classical plasticity model; in the case of the steel-concrete bonding, this one is considered perfect without degradation. At the end, we show a comparison between the experimental test's responses and the numerical results, which includes the distribution of shear stresses and damage inside the concrete core of the beam-column connection; in the other hand, the effects on the connection of a low and high state of confinement are analyzed for all cases.

Keywords

References

  1. Alamedinne, F. and Ehsani, M.R. (1991), "High-strength RC connections subjected to inelastic cycling loading", J. Struct. Eng. - ASCE , 117(3), 829-850. https://doi.org/10.1061/(ASCE)0733-9445(1991)117:3(829)
  2. Alcocer, S. (1991), Comportamiento y diseno de estructuras de concreto reforzado. Uniones de elementos, CENAPRED/Instituto de Ingenieria-UNAM. (In Spanish).
  3. Chakrabarty, J. (2006), Theory of plasticity, Elsevier Butterworth-Heinemann, London UK.
  4. 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", Eng. Comput., 22(5-6), 558-582. https://doi.org/10.1108/02644400510603014
  5. Ha, G.J. and Cho, C.G. (2008), "Strengthening of reinforced high-strength concrete beam-column joints using advanced reinforcement details", Mag. Concrete Res., 60(7), 487-497. https://doi.org/10.1680/macr.2008.60.7.487
  6. Ha, G.J., Cho, C.G., Kang, H.W. and Feo, L. (2012), "Seismic improvement of RC beam-column joints using hexagonal CFRP bars combined with CFRP sheets", Compos. Struct., DOI:10.1016/j.compstruct. 2012.08.022.
  7. Ibrahimbegovic, A, Gharzeddine, F. and Chorfi, L. (1998), "Classical plasticity and viscoplasticity models reformulated: theoretical basis and numerical implementation", Int. J. Numer.Meth. Eng., 42, 499-535. https://doi.org/10.1002/(SICI)1097-0207(19980615)42:3<499::AID-NME368>3.0.CO;2-O
  8. Ibrahimbegovic, A. (2009), Non linear solid mechanics, Springer, London/New York.
  9. Jehel, P., Davenne, L., Ibrahimbegovic, A. and Leger, P. (2010), "Towards robust viscoelastic-plastic-damage material model with different hardenings / softenings capable of representing salient phenomena in seismic loading applications", Comput. Concrete, 7(4), 365-386. https://doi.org/10.12989/cac.2010.7.4.365
  10. Karayannis, C.G. and Sirkelis, G.M. (2008), "Strengthening and rehabilitation of RC beam-column joints using carbon-FRP jacketing and epoxy resin injection", Earthq. Eng. Struct. D., 37(5), 769-790. https://doi.org/10.1002/eqe.785
  11. Kim, J. and LaFave, J.M. (2007), "Key influence parameters for the joint shear behaviour of reinforced concrete (RC) beam-column connections", Eng. Struct., 29(10), 2523-2539. https://doi.org/10.1016/j.engstruct.2006.12.012
  12. Lowes, L.N. and Moehle J.P. (1995), "Evaluation and retrofit of beam-column T-joints in older reinforced concrete bridge structures", ACI Struct. J., 96(4), 519-532.
  13. Lowes, L.N. (1999), Finite element modeling of reinforced concrete beam-column bridge connections. Ph. D. Thesis, Civil Engineering Graduated Division, University of California, Berkeley, USA.
  14. Lowes, L.N., Mitra, N. and Altoontash, A (2004), A beam-column joint model for simulating the earthquake response of reinforced concrete frames, Pacific Earthquake Engineering Research Center, PEER Report 2003/10, University of California, Berkeley, USA.
  15. Ma, S.Y.M., Bertero, V.V. and Popov, E.P. (1976), Experimental and analytical studies of the hysteretic behavior of reinforced concrete rectangular and T-beams, Report No. EERC-76-2. Berkeley: EERC, University of California, USA.
  16. Markovic, D. and Ibrahimbegovic, A. (2006), "Complementary energy based FE modeling of coupled elasto-plastic and damage behavior for continuum microestructure computations", Comput. Method. Appl. M., 195, 5077-5093. https://doi.org/10.1016/j.cma.2005.05.058
  17. Mazars J. (1986), "A description of micro- and macroscale damage of concrete structures", Eng. Fract. Mech., 25(5-6), 729-737. https://doi.org/10.1016/0013-7944(86)90036-6
  18. Meinheit, D.F. and Jirsa, J.O. (1977), The shear strength of reinforced concrete beam-column joints, CESRL Report No. 77-1. Austin: University of Texas.
  19. Ngo, V.M., Ibrahimbegovic, A. and Brancherie, D. (2014), "Thermomechanics failure of RC composites: computational approach with enhanced beam element", Coupled Syst. Mech., 3(1), 111-145. https://doi.org/10.12989/csm.2014.3.1.111
  20. Park, R. and Paulay, T. (1997), Estructuras de concreto reforzado. Limusa, Mexico.(In Spanish).
  21. Ragueneau, F., La Borderie, Ch. and Mazars, J. (2000), "Damage model for concrete like materials coupling cracking and friction, contribution towards structural damping: first uniaxial application", Mech. Cohesive-frictional Mater., 5, 607-625. https://doi.org/10.1002/1099-1484(200011)5:8<607::AID-CFM108>3.0.CO;2-K
  22. Sasmal, S. and Ramanjaneyulu, K. (2012), "Evaluation of strength hierarchy of beam-column joints of existing RC structures under seismic type loading", J. Earthq. Eng., 16(6), 897-915. https://doi.org/10.1080/13632469.2012.679998
  23. Taylor, R.L. (2005), "FEAP- A finite element analysis program version 7.4. User manual", See: http://www.ce.berkeley.edu/-rlt/feap/ .
  24. Visintin, P., Oehlers, D.J., Wu, C. and Griffith, M.C. (2012), "The reinforcement contribution to the cyclic behaviour of reinforced concrete beam hinges", Earthq. Eng. Struct. D., 41(12), 1591-1608. https://doi.org/10.1002/eqe.1189
  25. Wang, Y.C. (2012), "Reinforced concrete jacketing for seismic upgrading of RC frames with poor reinforcing details in beam-column joints", Proceedings of the International Offshore and Polar Engineering Conference.
  26. Wong, S.H.F. and Kuang, J.S. (2011), "Predicting shear strength of RC exterior beam-column joints by modified rotating-angle softened-truss model", Comput. Concrete, 8(1), 59-70. https://doi.org/10.12989/cac.2011.8.1.059
  27. Zhou, H. and Zhang, Z. (2012), "Interaction of internal forces of exterior beam-column joints of reinforced concrete frames under seismic action", Struct. Eng. Mech., 44(2), 197-217. https://doi.org/10.12989/sem.2012.44.2.197

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