Computers and Concrete

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Finite element development of a Beam-column connection with CFRP sheets subjected to monotonic and cyclic loading

  • Rahimipour, Arash (Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia) ;
  • Hejazi, Farzad (Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia) ;
  • Vaghei, Ramin (Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia) ;
  • Jaafar, Mohd Saleh (Department of Civil Engineering, Faculty of Engineering, University Putra Malaysia)
  • Received : 2014.11.09
  • Accepted : 2016.09.12
  • Published : 2016.12.25
⟨ Previous Next ⟩

Abstract

Beam-column joints are recognized as the weak points of reinforcement concrete frames. The ductility of reinforced concrete (RC) frames during severe earthquakes can be measured through the dissipation of large energy in beam-column joint. Retrofitting and rehabilitating structures through proper methods, such as carbon fiber reinforced polymer (CFRP), are required to prevent casualties that result from the collapse of earthquake-damaged structures. The main challenge of this issue is identifying the effect of CFRP on the occurrence of failure in the joint of a cross section with normal ductility. The present study evaluates the retrofitting method for a normal ductile beam-column joint using CFRP under monotonic and cyclic loads. Thus, the finite element model of a cross section with normal ductility and made of RC is developed, and CFRP is used to retrofit the joints. This study considers three beam-column joints: one with partial CFRP wrapping, one with full CFRP wrapping, and one with normal ductility. The two cases with partial and full CFRP wrapping in the beam-column joints are used to determine the effect of retrofitting with CFRP wrapping sheets on the behavior of the beam-column joint confined by such sheets. All the models are subjected to monotonic and cyclic loading. The final capacity and hysteretic results of the dynamic analysis are investigated. A comparison of the dissipation energy graphs of the three connections shows significant enhancement in the models with partial and full CFRP wrapping. An analysis of the load-displacement curves indicates that the stiffness of the specimens is enhanced by CFRP sheets. However, the models with both partial and full CFRP wrapping exhibited no considerable improvement in terms of energy dissipation and stiffness.

Keywords

Acknowledgement

Supported by : Ministry of Higher Education of Malaysia

References

  1. Agarwal, P., Gupta, A., and Angadi, R.G. (2014), "Effect of FRP wrapping on axial behavior of concrete and cyclic behavior of external RC beam column joints", J. Civil Eng., 18(2), 566-573.
  2. Al-Salloum, Y.A. and Almusallam, T.H. (2007), "Seismic response of interior RC beam-column joints upgraded with FRP sheets. I: Experimental study", J. Compos. Constr., 11(6), 575-589. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:6(575)
  3. Alhaddad, M.S., Siddiqui, N.A., Abadel, A.A., Alsayed, S.H. and Al-Salloum, Y.A. (2011), "Numerical investigations on the seismic behavior of FRP and TRM upgraded RC exterior beam-column joints", J. Compos. Constr., 16(3), 308-321. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000265
  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. Constr., 14(2), 195-208. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000067
  5. Balsamo, A., Colombo, A., Manfredi, G., Negro, P. and Prota, A. (2005), "Seismic behavior of a full-scale RC frame repaired using CFRP laminates", Eng. Struct., 27(5), 769-780. https://doi.org/10.1016/j.engstruct.2005.01.002
  6. Binici, B. and Bayrak, O. (2005), "Use of fiber-reinforced polymers in slab-column connection upgrades", ACI Struct. J., 102(1), 93.
  7. Bousselham, A. (2009), "State of research on seismic retrofit of RC beam-column joints with externally bonded FRP", J. Compos. Constr., 14(1), 49-61. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000049
  8. Dalalbashi, A., Eslami, A. and Ronagh, H. (2013), "Numerical investigation on the hysteretic behavior of RC joints retrofitted with different CFRP configurations", J. Compos. Constr., 17(3), 371-382. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000361
  9. El-Amoury, T. and Ghobarah, A. (2002), "Seismic rehabilitation of beam-column joint using GFRP sheets", Eng. Struct., 24(11), 1397-1407. https://doi.org/10.1016/S0141-0296(02)00081-0
  10. Engindeniz, M., Kahn, L.F. and Zureick, A.H. (2005), "Repair and strengthening of reinforced concrete beam-column joints: State of the art", ACI Struct. J., 102(2), 1.
  11. Eslami, A. and Ronagh, H.R. (2013), "Effect of FRP wrapping in seismic performance of RC buildings with and without special detailing-A case study", Compos. Part B: Eng., 45(1), 1265-1274. https://doi.org/10.1016/j.compositesb.2012.09.031
  12. Gergely, J., Pantelides, C.P. and Reaveley, L.D. (2000), "Shear strengthening of RCT-joints using CFRP composites", J. Compos. Constr., 4(2), 56-64. https://doi.org/10.1061/(ASCE)1090-0268(2000)4:2(56)
  13. Ghobarah, A. and Said, A. (2002), "Shear strengthening of beam-column joints", Eng. Struct., 24(7), 881-888. https://doi.org/10.1016/S0141-0296(02)00026-3
  14. Ha, G.J., Cho, C.G., Kang, H.W. and Feo, L. (2013), "Seismic improvement of RC beam-column joints using hexagonal CFRP bars combined with CFRP sheets", Compos. Struct., 95, 464-470. https://doi.org/10.1016/j.compstruct.2012.08.022
  15. Halabi, Z., Ghrib, F., El-Ragaby, A., and Sennah, K. (2012), "Behavior of RC Slab-Column Connections Strengthened with External CFRP Sheets and Subjected to Eccentric Loading." J. Compos. Constr., 17(4), 488-496. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000343
  16. Karayannis, C., Chalioris, C. and Sideris, K. (1998), "Effectiveness of RC beam-column connection repair using epoxy resin injections", J. Earthq. Eng., 2(02), 217-240.
  17. Le-Trung, K., Lee, K., Shin, M. and Lee, J. (2011), "Analytical assessment and modeling of RC beamcolumn connections strengthened with CFRP composites", Compos. Part B: Eng., 42(7), 1786-1798. https://doi.org/10.1016/j.compositesb.2011.07.002
  18. Li, B. and Chua, H.G. (2009), "Seismic performance of strengthened reinforced concrete beam-column joints using FRP composites", J. Struct. Eng., 135(10), 1177-1190. https://doi.org/10.1061/(ASCE)0733-9445(2009)135:10(1177)
  19. Li, B., Wu, Y. and Pan, T.C. (2002), "Seismic behavior of nonseismically detailed interior beam-wide column joints-Part I: Experimental results and observed behavior", ACI Struct. J., 99(6), 791-802.
  20. Mahini, S.S. and Ronagh, H.R. (2011), "Web-bonded FRPs for relocation of plastic hinges away from the column face in exterior RC joints", Compos. Struct., 93(10), 2460-2472. https://doi.org/10.1016/j.compstruct.2011.04.002
  21. Omidi, M. and Behnamfar, F. (2015), "A numerical model for simulation of RC beam-column connections", Eng. Struct., 88, 51-73. https://doi.org/10.1016/j.engstruct.2015.01.025
  22. Pampanin, S., Bolognini, D. and Pavese, A. (2007), "Performance-based seismic retrofit strategy for existing reinforced concrete frame systems using fiber-reinforced polymer composites", J. Compos. Constr., 11(2), 211-226. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:2(211)
  23. Parvin, A., Altay, S., Yalcin, C. and Kaya, O. (2009), "CFRP rehabilitation of concrete frame joints with inadequate shear and anchorage details", J. Compos. Constr., 14(1), 72-82. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000055
  24. Realfonzo, R., Napoli, A. and Pinilla, J.G.R. (2014), "Cyclic behavior of RC beam-column joints strengthened with FRP systems", Constr. Build. Mater., 54, 282-297. https://doi.org/10.1016/j.conbuildmat.2013.12.043
  25. 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", Constr. Build. Mater., 25(1), 175-182. https://doi.org/10.1016/j.conbuildmat.2010.06.041
  26. Taheri, H., Hejazi, F., Vaghei, R., Jaafar, M.S. and Ali, A.A.A. (2016), "New precast wall connection subjected to rotational loading", Periodica Polytech. Civil Eng., 60(4), 547-560. https://doi.org/10.3311/PPci.8545
  27. Tsonos, A.G. and Stylianidis, K. (2002), "Seismic retrofit of Beam-to-Column joints with high-strenght fiber jackets", Eur. Earthq. Eng., 16(2), 56-72.
  28. Vaghei, R., Hejazi, F., Taheri, H., Jaafar, M.S. and Ali, A.A.A. (2014), "Evaluate performance of precast concrete wall to wall connection", APCBEE Procedia, 9, 285-290. https://doi.org/10.1016/j.apcbee.2014.01.051
  29. Vaghei, R., Hejazi, F., Taheri, H., Jaafar, M.S. and Ali, A.A.A. (2016), "A new precast wall connection subjected to monotonic loading", Comput. Concrete, 17(1), 1-27. https://doi.org/10.12989/cac.2016.17.1.001

Cited by

  1. Study on the performance of concrete-filled steel tube beam-column joints of new types vol.26, pp.6, 2020, https://doi.org/10.12989/cac.2020.26.6.547