Earthquakes and Structures

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Behaviour of repaired RC beam-column joints using welded wire mesh and jacketed with polymer modified mortar

  • Received : 2021.04.27
  • Accepted : 2021.06.01
  • Published : 2021.07.25
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Abstract

The performances of repaired RC exterior beam-column joints were reported in this paper. The aim of the study was to restore back the lost capacity of the beam-column joint to the original state or more. Five type of exterior beam-column joint with different position of cold joint in the column were casted and subjected to reversed cyclic loading. The damage zones were confined with welded wire mesh (WWM) of 20 mm grid size and jacketed with polymer modified mortar (PMM). Damaged specimens after repairing were also subjected to similar cyclic displacement as those of control specimens. Seismic parameters such as load carrying capacity, energy dissipation, ductility, stiffness degradation, equivalent viscous damping, damage indices and nominal principal tensile stresses were analyzed. Results show that repaired specimens exhibited better seismic performance and hence the adopted repairing strategies could be considered as appropriate. These findings would be helpful to the field engineers to adopt a suitable rapid and cost-efficient repairing technique for restoring the damaged frame structural joints for post-earthquake usage. Further, the study revealed that there is an improvement in seismic capacity of the specimens as the location of cold joint is placed away from the soffit of the beam for lower story column.

Keywords

References

  1. ACI (American Concrete Institute) ACI 224.3R-95 (2013), Joints in Concrete Construction. American Concrete Institute.
  2. ACI 352R-02 (2002), Recommendations for Design of BeamColumn Connections in Monolithic Reinforced Concrete Structures, Farmington Hills, American Concrete Institute, MI.
  3. ACI Committee 318 (2008), Building Code Requirement for Structural Concrete, American Concrete Institute, Farmington Hills, MI, USA.
  4. Alsayed, S.H., Al-Salloum, Y. A., Almusallam, T.H. and Siddiqui, N.A. (2010), "Seismic response of FRP-upgraded exterior RC beam-column joints", J. Compos. Construct., ASCE, 14(2), 195-208. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000067.
  5. Ascione, F., Lamberti, M., Razaqpur, A.G. and Spadea, S. (2017), "Strength and stiffness of adhesively bonded GFRP beam column moment resisting connections", Compos. Struct., 60, 1248-1257. https://doi.org/10.1016/j.compstruct.2016.11.021.
  6. Bentayeb, F., Tahar, K.A. and Chateauneuf, A. (2008), "New technique for reinforcement of concrete columns confined by embedded composite grid", Construct. Build. Mater., 22, 1624-1633. https://doi.org/10.1016/j.conbuildmat.2007.06.015.
  7. Chidambaram, R.S. and Agarwal, P. (2014), "The confining effect of geo-grid on the mechanical properties of concrete specimens with steel fiber under compression and flexure", Construct. Build. Mater., 71, 628-637. https://doi.org/10.1016/j.conbuildmat.2014.08.059.
  8. Choi, J.H. (2008), "Seismic retrofit of reinforced concrete circular columns using stainless steel wire mesh composite", Canadian J. Civil Eng., 35(2), 140-147. https://doi.org/10.1139/L07-079.
  9. Esfahani, M.R., Kianoush, M.R. and Tajari, A.R. (2007), "Flexural behaviour of reinforced concrete beams strengthened by CFRP sheets", Eng. Struct., 29(10), 2428-2444. https://doi.org/10.1016/j.engstruct.2006.12.008.
  10. Eurocode 2 (2004), Design of Concrete Structures - Part 1-1: General Rules and Rules for buildings, EN 1992-1, CEN European Committee for Standardization, Brussels.
  11. Eurocode 8 (2004), Design of Structures for Earthquake Resistance -Part 1: General Rules, Seismic Actions and Rules for Buildings, EN 1998-1, CEN European Committee for Standardization, Brussels.
  12. Filiatrault, A. and Isabelle L. (1996), "Seismic rehabilitation of reinforced concrete joints by epoxy pressure injection technique", ACI, SP 160-3.
  13. Ghobarah, A. and Said, A. (2002), "Shear strengthening of beamcolumn joints", Eng. Struct., 24(7), 881-888. https://doi.org/10.1016/S0141-0296(02)00026-3.
  14. Ghobarah, A., Aziz, A. and Biddah, T.S. (1997), "Rehabilitation of reinforced concrete frame connections using corrugated steel jacketing", ACI Struct. J., 4(3), 283-294.
  15. Hadi, M.N.S. (2010), "Rehabilitating destructed reinforced concrete T- connections by steel strap", J. Construct. Build. Mater., 25(2), 851-858. https://doi.org/10.1016/j.conbuildmat.2010.06.102.
  16. Hadi, M.N.S. and Tran, T.M. (2016), "Seismic rehabilitation of reinforced concrete beam-column joints by bonding with concrete covers and wrapping with FRP composites", Mater. Struct., 49(1-2), 467-485. https://doi.org/10.1617/s11527-014-0511-4.
  17. Hakuto, S., Park, R. and Tanaka, H. (2000), "Seismic load tests on interior and exterior beam-column joints with substandard reinforcing details", ACI, Struct. J., 97(1), 11-25.
  18. IS 13920 (2016), Ductile Detailing of Reinforced Concrete Structures Subjected to Seismic Forces, Code of Practice. Bureau of Indian Standard, New Delhi.
  19. IS 1608 (1995), Mechanical Testing of Metals - Tensile Testing, Bureau of Indian Standard, New Delhi.
  20. IS 432: Part 1 (1982), Specification for Mild Steel and Medium Tensile Steel Bars and Hard-Drawn Steel Wire for Concrete Reinforcement: Part I Mild Steel and Medium Tensile Steel Bars, Bureau of Indian Standard, New Delhi.
  21. IS 456 (2000), Plain and Reinforced Concrete, Code of Practice. Bureau of Indian Standard, New Delhi.
  22. Issa, C.A., Gerges, N.N. and Fawaz, S. (2014), "The effect of concrete vertical construction joints on modulus of rupture", Case Studies Construct. Mater., 1, 25-32. https://doi.org/10.1016/j.cscm. 2013.12.001
  23. Kakaletsis, D.J., David, K.N. and Karayannis, C.G. (2011), "Effectiveness of some conventional seismic retrofitting techniques for bare and infilled R/C frame", Struct. Eng. Mech., 39(4), 499-520. https://doi.org/10.12989/sem.2011.39.4.499.
  24. Karayannis, C.G, Chalioris, C.E. and Sirkelis, G.M. (2008), "Local retrofit of exterior RC beam-column joints using thin RC jackets-An experimental study", Earthq. Eng. Struct. Dyn., 37, 727-746. https://doi.org/10.1002/eqe.783.
  25. Karayannis, C.G. and Golias, E. (2018), "Full scale tests of RC joints with minor to moderate seismic damage repaired using C-FRP sheets", Earthq. Struct., 15(6), 617-627. http://dx.doi.org/10.12989/eas.2018.15.6.617.
  26. Karayannis, C.G. and Golias, E. (2021), "Strengthening of deficient RC joints with diagonally placed external C-FRP ropes", Earthq. Struct., 20(1), 123-132, https://doi.org/10.12989/eas.2021.20.1.123.
  27. Kumar, V. and Patel, P.V. (2016), "Strengthening of axially loaded circular concrete columns using stainless steel wire mesh (SSWM)-Experimental investigations", Construct. Build. Mater., 124, 186-198. https://doi.org/10.1016/j.conbuildmat.2016.06.109.
  28. Li, B., Lam, E.S., Wu, B. and Wang, Y. (2015), "Seismic behavior of reinforced concrete exterior beam-column joints strengthened by ferrocement composites", Earthq. Struct., 9(1), 233-256. https://doi.org/10.12989/eas.2015.9.1.233.
  29. Marthong, C. (2019), "Rehabilitation of exterior RC beam-column connections using epoxy resin injection and FRP wrapping", Struct. Eng. Mech., 72(6), 723-736. https://doi.org/10.12989/eas.2019.16.3.253.
  30. Marthong, C., Dutta, A. and Deb, S.K. (2013), "Seismic rehabilitation of RC exterior beam-column connections using epoxy resin injection", J. Earthq. Eng., 17(3), 378-398. https://doi.org/10.1080/13632469.2012.738284.
  31. Mosallam, A.S. (2000), "Strength and ductility of reinforced concrete moment frame connections strengthened with quasiIsotropic laminates", Compos. Part B-Eng., 31(6-7), 481-497. https://doi.org/10.1016/S1359-8368(99)00068-2.
  32. Mukherjee, A. and Joshi, M. (2005), "FRPC reinforced concrete beam-column joints under cyclic excitation", Compos. Struct., 70, 185-199. https://doi.org/10.1016/j.compstruct.2004.08.022.
  33. Naeim, F. and Kelly, J.M. (1999), Design of Seismic Isolated Structures from Theory to Practice", John Willey & Sons, Inc.
  34. Park, Y.J. and Ang, A.H.S. (1985), "Mechanistic seismic damage model for reinforced concrete", ASCE, 111(4), 722-739. https://doi.org/10.1061/(ASCE)0733-9445(1985)111:4(722)
  35. Patel, P.V., Raiyani, S.D. and Shah, P.J. (2018), "Torsional strengthening of RC beams using stainless steel wire mesh Experimental and numerical study", Struct. Eng. Mech., 67(4), 391-401. http://dx.doi.org/10.12989/sem.2018.67.4.39.
  36. Roy, B. and Laskar, A.I. (2017), "Cyclic behaviour of in-situ exterior beam-column subassemblies with cold joint in column", Eng. Struct., 132, 822-833. https://doi.org/10.1016/j.engstruct.2016.12.001.
  37. Sasmal, S., Ramanjaneyulu, K., Novak, B., Srinivas, V., Kumar, K. S., Korkowski, C. and Iyer, N.R. (2011), "Seismic retrofitting of nonductile beam-column sub-assemblage using FRP wrapping and steel plate jacketing", Construct. Build. Mater., 25(1), 175-182. https://doi.org/10.1016/j.conbuildmat.2010.06.041.
  38. Sezen, H., Elwood, K.J., Whittaker, A.S., Mosalam, K.M., Wallace, J.W. and Stanton, J.F. (2000). Structural Engineering Reconnaissance of the August 17, 1999 Earthquake": Kocaeli (Izmit), Turkey, PEER 2000/09, University of California, Berkeley, U.S.A.
  39. Shannag, M.J. and Alhassan, M.A. (2005), "Seismic upgrade of interior beam-column sub-assemblages with high performance fiber reinforced concrete jackets", ACI, Struct. J., 102(1), 131-138.
  40. Teng, J.G., Chen, J.F., Smith, S.T. and Lam, L. (2002), FRP Strengthened RC Structures, John Wiley & Sons, Lt.
  41. Tsonos, A.G. (2002), "Seismic repair of RC beam-column assemblages of modern structures by epoxy injection technique", J. Struct. Eng. Mech., 14(5), 543-563. http://dx.doi.org/10.12989/sem.2002.14.5.543.
  42. Tsonos, A.G. (2007), "Cyclic load behaviour of reinforced concrete beam-column sub-assemblages of modern structures", ACI Struct. J., 194(4), 468-478.
  43. Tsonos, A.G. (2008), "Effectiveness of CFRP-jackets and RCjackets in post-earthquake and pre-earthquake retrofitting of beam-column sub-assemblages", Eng. Struct., 30, 777-793. https://doi.org/10.1016/j.engstruct.2007.05.008.
  44. Tsonos, A.G. (2009), "Ultra-high-performance fiber reinforced concrete: An innovative solution for strengthening old R/C structures and for improving the FRP strengthening method", WIT Trans. Eng. Sci., 64, 273-284. https://doi.org/10.2495/MC090261
  45. Tsonos, A.G. (2010), "Performance enhancement of R/C building columns and beam-column joints through shotcrete jacketing", Eng. Struct., 32, 726-740. https://doi.org/10.1016/j.engstruct.2009.12.001.
  46. Tsonos, A.G. (2014), "An innovative solution for strengthening of old R/C structures and for improving the FRP strengthening method", J. Struct. Monit. Maint., 1(3), 323-338. http://dx.doi.org/10.12989/smm.2014.1.3.323.
  47. Tsonos, A.G. and Papanikolaou, K.V. (2003), "Post-earthquake repair and strengthening of reinforced concrete beam-column connections (Theoretical and experimental investigation)", Bull. NZ Soc. Earthq. Eng., 36(2), 73-93. https://doi.org/10.5459/bnzsee.36.2.73-93.
  48. Vanlalruata, J. and Marthong, C. (2021a), "Effect of cold joint on the flexural strength of RC beam", J. Struct. Integrity Maint., 6(1), 28-36. https://doi.org/10.1080/24705314.2020.1823556.
  49. Vanlalruata, J. and Marthong, C. (2021b), "Behaviour of RC beam-column joint with varying location of construction joints in the column", Earthq. Struct., 20(10), 29-38. https://doi.org/10.12989/eas.2021.20.1.29.
  50. Vidjeapriya, R. and Jaya, K.P. (2013), "Experimental study on two simple mechanical precast beam-column connections under reverse cyclic loading", J. Perform. Construct. Facilities, 27, 402-414. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000324.
  51. William, M.S. and Sexsmith, R.G. (1995), "Seismic damage indices for concrete structures: a state-of-the-art review", Earthq. Spectra, 11(2), 319-349. https://doi.org/10.1193/1.1585817.