Structural Engineering and Mechanics

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Seismic resistance of exterior beam-column joints with non-conventional confinement reinforcement detailing

  • Bindhu, K.R. (Department of Civil Engineering, College of Engineering) ;
  • Jaya, K.P. (Structural Engineering Division, Anna University) ;
  • Manicka Selvam, V.K. (Department of Civil Engineering, National Institute of Technology)
  • Received : 2007.10.29
  • Accepted : 2008.10.29
  • Published : 2008.12.20
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Abstract

The failure of reinforced concrete structures in recent earthquakes caused concern about the performance of beam column joints. Confinement of joint is one of the ways to improve the performance of beam column joints during earthquakes. This paper describes an experimental study of exterior beam-column joints with two non-conventional reinforcement arrangements. One exterior beam-column joint of a six story building in seismic zone III of India was designed for earthquake loading. The transverse reinforcement of the joint assemblages were detailed as per IS 13920:1993 and IS 456:2000 respectively. The proposed nonconventional reinforcement was provided in the form of diagonal reinforcement on the faces of the joint, as a replacement of stirrups in the joint region for joints detailed as per IS 13920 and as additional reinforcement for joints detailed as per IS 456. These newly proposed detailing have the basic advantage of reducing the reinforcement congestion at the joint region. In order to study and compare the performance of joint with different detailing, four types of one-third scale specimens were cast (two numbers in each type). The main objective of the present study is to investigate the effectiveness of the proposed reinforcement detailing. All the specimens were tested under reverse cyclic loading, with appropriate axial load. From the test results, it was found that the beam-column joint having confining reinforcement as per IS: 456 with nonconventional detailing performed well. Test results indicate that the non-conventionally detailed specimens, Type 2 and Type 4 have an improvement in average ductility of 16% and 119% than their conventionally detailed counter parts (Type1 and Type 3). Further, the joint shear capacity of the Type 2 and Type 4 specimens are improved by 8.4% and 15.6% than the corresponding specimens of Type 1 and Type 3 respectively. The present study proposes a closed form expression to compute the yield and ultimate load of the system. This is accomplished using the theory of statics and the failure pattern observed during testing. Good correlation is found between the theoretical and experimental results.

Keywords

References

  1. ACI Committee 318 (2002), 'Building Code Requirements for Structural Concrete (ACI 318-02)', Am. Conc. Inst., Detroit
  2. Agbabian, M.S., Higazy, E.M., Abdel-Ghaffar, M., and Elnashai, A.S. (1994), 'Experimental observations on the seismic shear performance of R/C beam-to-column connections subjected to varying axial column force', J. Earthq. Eng. Struct. Dynam., 23, 859-876 https://doi.org/10.1002/eqe.4290230804
  3. Anandavalli, N., Lakshmanan, N., Jayaraman, R., and Thandavamoorthy, T.S. (2005), 'Testing and evaluation of full scale beam-column joints of power plant structures', J. Struct. Eng., SERC, India, 32(1), 1-9
  4. Bakir, P.G. and Boduroglu, M.H. (2002), 'Predicting the failure modes of monotonically loaded reinforced concrete exterior beam-column joints', Struct. Eng. Mech., 14(3), 307-330 https://doi.org/10.12989/sem.2002.14.3.307
  5. Bakir, P.G. (2003), 'Seismic Resistance and mechanical behavior of exterior beam-column joints with crossed inclined bars', Struct. Eng. Mech., 16(4), 493-517 https://doi.org/10.12989/sem.2003.16.4.493
  6. Bakir, P.G. and Boduroglu, M.H. (2006), 'Nonlinear analysis of beam-column joints using softened truss model', Mech. Res. Commun., 33(2), 134-147 https://doi.org/10.1016/j.mechrescom.2005.09.002
  7. Bonacci, J. and Pantazopoulou, S. (1993), 'Parametric investigation of joint mechanics', ACI Struct. J., 90(1), 61-71
  8. Chalioris, C.E., Favvata, M.J., and Karayannis, C.G. (2008), 'Reinforced concrete beam-column joints with crossed inclined bars under cyclic deformations', J. Earthq. Eng. Struct. D, 37, 881-897 https://doi.org/10.1002/eqe.793
  9. Durrani, A.J. and Wight, J.K. (1985), 'Behavior of interior beam to column connections under earthquake-type loading', ACI Struct. J., 82(3), 343-349
  10. El-Amoury, T. and Ghobarah, A. (2002), 'Seismic rehabilitation of beam-column joint using GFRP sheets', Eng. Struct., 24, 1397-1407 https://doi.org/10.1016/S0141-0296(02)00081-0
  11. EuroCode8 (2002), 'Design of structures for earthquake resistance (draft)', European Committee for Standardization, CEN/TC 250/SC8/N317, 87-89
  12. Hwang, S.J., Lee, H.J., Liao, T.F., Wang, K.C., and Tsai, S.H. (2005), 'Role of hoops on shear strength of reinforced concrete beam-column joints', ACI Struct. J., 102(3), 445-453
  13. Ingle, R.K. and Jain, S.K. (2005), 'Explanatory examples for ductile detailing of R.C buildings', IITK-GSDMA Project Report on Building Codes, I IT, Kanpur, India
  14. IS 13920 (1993), 'Indian standard ductile detailing of reinforced concrete structures subjected to seismic forces', Bureau of Indian Standards, New Delhi, India
  15. IS 1893 (Part 1) (2002), 'Indian standard criteria for earthquake resistant design of structures', Bureau of Indian Standards, New Delhi, India
  16. IS 456 (2000), 'Indian standard plain and reinforced concrete code of practice', Bureau of Indian Standards, New Delhi, India
  17. Jain, S.K. and Murty, C.V.R. (2005a), 'Proposed draft provisions and commentary on Indian seismic code IS 1893 (Part 1)', IITK-GSDMA Project Report on Building Codes, IIT, Kanpur, India
  18. Jain, S.K. and Murty, C.V.R. (2005b), 'Proposed draft provisions and commentary on ductile detailing of rc structures subjected to seismic forces', IITK-GSDMA Project Report on Building Codes, IIT, Kanpur, India
  19. Jing, L.I., PAM, H.J., and Kwong, F.T.A.U. (2004), 'New details of HSC beam-column joints for regions of low to moderate seismicity', Proc.13th World Conference on Earthquake Engineering, Vancouver, Canada, Paper No. 449
  20. Jisra, J.O. (1991), 'Design of beam-column joints for seismic resistance, SP-123', Am. Conc. Inst., Farmington Hills, Michigan
  21. Karayannis, C.G, Chalioris, C.E., and Sideris, K.K. (1998), 'Effectiveness of RC beam-column connections repair using epoxy resin injections', J. Earthq. Eng., 2, 217-240 https://doi.org/10.1142/S1363246998000101
  22. Karayannis, C., Sirkelis, G., and Mavroeidis, P. (2005), 'Improvement of seismic capacity of external beamcolumn joints using continuous spiral shear reinforcement', Proc. 5thConference on 'Earthquake Resistant Engineering Structures, (ERES 2005), Skiathos, Greece,147-156
  23. Karayannis, C.G. and Sirkelis, G.M. (2008), 'Strengthening and rehabilitation of RC beam-column joints using carbon-FRP jacketing and epoxy resin injection', J. Earthq. Eng. Struct. Dynam., 37, 769-790 https://doi.org/10.1002/eqe.785
  24. Leon, R.T. (1990), 'Shear strength and hysteretic behavior of interior beam-column joints', ACI Struct. J., 87(1), 3-11
  25. Minami, K. and Wakabayashi, M. (1984), 'Strength and ductility of diagonally reinforced concrete columns', Proc. 8th World Conference on Earthquake Engineering, San Francisco, 561-568
  26. Murty, C.V.R., Durgesh, C. Rai, Bajpai, K.K., and Sudhir, K. Jain (2001), 'Anchorage details and joint design in seismic R.C frames', Indian Conc. J., 274-280
  27. Murty, C.V.R., Durgesh, C. Rai, Bajpai, K.K., and Sudhir, K. Jain (2003), 'Effectiveness of reinforcement details in exterior reinforced concrete beam column joints for earthquake resistance', ACI Struct. J., 100(2), 149-155
  28. NZS 3101 (1995), 'Concrete structures standard, Part 1 and 2, Code and commentary on the design of concrete structures,' New Zealand Standard, New Zealand
  29. Pantazopoulou, S. and Bonacci, J. (1992), 'Consideration of questions about beam-column joints', ACI Struct. J., 89(1), 27-36
  30. Park, R. and Paulay, T. (1975), Reinforced Concrete Structure, Wiley-Inter science publication, New York, 1975
  31. Paulay, T., Park, R., and Priestley, M.J.N. (1978), 'Reinforced concrete beam-column joints under seismic actions', ACI J., 75, 585-593
  32. Paulay, T. and Park, R. (1984), 'Joints in reinforced concrete frames designed for earthquake resistance', Research report 84-9, Department of Civil Engineering, University of Canterbury, Christchurch, New Zealand
  33. SatishKumar, S.V., Vijaya Raju, B., and Rajaram, G.S.B.V.S. (2002), 'Hysteretic behavior of lightly reinforced exterior beam-to-column joint sub-assemblages', J. Struct. Eng., S.E.R.C., India, 30(3), 31-37
  34. SP34 (1987), 'Indian standard Handbook on concrete reinforcement and detailing', Bureau of Indian Standards, New Delhi, India
  35. Subramanian, N. and Rao, P.D.S. (2003), 'Seismic design of joints in RC structures-a review,' Indian Conc. J., 77(2), 883-892
  36. Tsonos, A.G., Tegos, I.G., and Penelis, G. Gr. (1992), 'Seismic resistance of Type 2 exterior beam-column joints reinforced with inclined bars', ACI Struct. J., 89(1), 3-12
  37. Tsonos, A.G. (1999), 'Lateral load response of strengthened reinforced concrete beam-to-column joints', ACI Struct. J., 96(1), 46-56
  38. Tsonos, A.G. (2000), 'Effect of vertical hoops on the behavior of reinforced concrete beam-column connections', Euro. Earthq. Eng., 2, 13-26
  39. Tsonos, A. G. (2004), 'Improvement of the earthquake resistance of R/C beam-column joints under the influence of P-${\Delta}$ effect and axial force variations using inclined bars', Struct. Eng. Mech., 18(4), 389-410 https://doi.org/10.12989/sem.2004.18.4.389
  40. Tsonos, A.G. (2007), 'Cyclic load behavior of reinforced concrete beam-column subassemblages of modern structures', ACI Struct. J. 104(4), 468-478
  41. Uma, S.R. and Prasad, A.M. (2003), 'Analytical model for beam column joint in RC frames under seismic conditions', J. Struct. Eng., SERC, India, 30(3), 163-171
  42. Uma, S.R. and Prasad, A.M. (2006), 'Seismic behavior of beam-column joints in RC moment resisting frames: a review', Indian Conc. J., January, 33-42
  43. Uzumeri, S.M. (1977), 'Strength and ductility of cast-in-place beam-column joints', ACI, SP 53-12(Reinforced Concrete in Seismic Zones), Detroit, 293-350
  44. Wallace, J.W., McConnell, S.W., Gupta, P., and Cote, P.A. (1998), 'Use of headed reinforcement in beamcolumn joints subjected to earthquake loads', ACI Struct. J., 95(5), 590-606

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