Structural Engineering and Mechanics

  • 제64권6권
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  • Pages.783-792
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  • 2017
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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CFRP strengthening of continuous RC T-beams at hogging moment zone across the flange

  • Eldin, Mohammad Mohie (Department of Civil Engineering, Faculty of Engineering, Beni-Suef University) ;
  • Tarabia, Ahmed M. (Department of Structural Engineering, Faculty of Engineering, Alexandria University) ;
  • Hasson, Rahma F. (Department of Civil Engineering, Faculty of Engineering, Sirte University)
  • 투고 : 2017.01.23
  • 심사 : 2017.09.06
  • 발행 : 2017.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Carbon Fiber Reinforced Polymer (CFRP) laminates are used widely either for repairing or strengthening of existing structures. When CFRP laminates are used for strengthening of RC continuous T-beams in the Hogging Moment Zone (HMZ); above and around the intermediate supports, it is important to study the expected positions of the laminates across the width of the beam flange. Although, it is traditional to consider CFRP laminates added above the beam web, this is not practical since walls and columns are located in such positions in general. This paper examines the effect of changing the positions of CFRP laminates used for the strengthening of the hogging moment zone across the beam flange of two-span-T-section beams. The Finite Element (FE) Package ANSYS is used to create 3-D theoretical models needed for the study. It can be concluded that changing the position of CFRP strengthening across the beam flange, in the hogging moment zone, is effective upon the overall behavior. The best locations are either above the web or at the flange just beside the web, due to the presence of walls and/or columns.

키워드

참고문헌

  1. Aiello, M.A. and Ombres, L. (2011), "Moment redistribution in continuous fiber-reinforced polymer-strengthened reinforced concrete beams", ACI Struct. J., 108(2), 158-166.
  2. ANSYS (2013), "ANSYS Help", Release 15.0.
  3. ECP-203 (2007), Egyptian Code of Practice for the Design and Implementation of Reinforced Concrete Structures, Housing and Building Research Center (HBRC), Cairo, Egypt.
  4. ECP-208 (2005), Egyptian Code for the Design Principals and Implementation Requirements of Using CFRP in Fields of Construction, Housing and Building Research Center (HBRC), Cairo, Egypt.
  5. El-Mogy, M., El-Ragaby, A. and El-Salakawy, E. (2013), "Experimental testing and finite element modeling on continuous concrete beams reinforced with fibre reinforced polymer bars and stirrups", Can. J. Civil Eng., 40(11), 1091-1102. https://doi.org/10.1139/cjce-2012-0509
  6. El-Refaie, S.A., Ashour, A.F. and Garrity, S.W. (2003), "Sagging and hogging strengthening of continuous reinforced concrete beams using carbon fiber-reinforced polymer laminates", ACI Struct. J., 100(4), 446-453.
  7. Iesa, W.M., Alferjani, M.B.S., Ali, N. and AbdulSamad, A.A. (2010), "Study on shear strengthening of RC continuous beams with different CFRP wrapping schemes", Int. J. Integ. Eng., 2(2), 35-43.
  8. Lu, X.Z., Ten, J.G., Ye, L.P. and Jaing, J.J. (2005), "Bond-slip models for FRP sheets/plates bonded to concrete", J. Eng. Struct., 24(5), 920-937.
  9. Maghsoudi, A.A. and Bengar, H.A. (2009), "Moment redistribution and ductility of RHSC continuous beams strengthened with CFRP", Turkish J. Eng. Environ. Sci., 33, 45-59.
  10. Rahman, M.M. and Rahman, M.W. (2013), "Simplified method of strengthening RC continuous T beam in the hogging zone using carbon fiber reinforced polymer laminate-A numerical investigation", J. Civil Eng. Constr. Technol., 4(6), 174-183.
  11. Sakr, M.A., Khalifa, T.M. and Mansour, W.N. (2014), "External strengthening of RC continuous beams using FRP plates: finite element model", Proceedings of the Second Intl. Conf. on Advances in Civil, Structural and Mechanical Engineering- CSM 2014, 168-174.
  12. Saleh, A.R. and Barem, A.A.H. (2013), "Experimental and theoretical analysis for behavior of R.C. continuous beams strengthened by CFRP laminates", J. Babylon Uni. (Iraq), Eng. Sci., 21(5), 1555-1567.
  13. Saribiyik, A. and Caglar, N. (2016), "Flexural strengthening of RC beams with low-strength concrete using GFRP and CFRP", Struct. Eng. Mech., 58 (5), 825-845. https://doi.org/10.12989/sem.2016.58.5.825
  14. Shrestha, U.S. (2014), "Modified composite application to improve strength and ductility of structural components", MSc Dissertation, College of Graduate Studies, The University of Toledo, Ohio, United States.
  15. Taerwe, L., Vasseur, L. and Matthys, S. (2009), "External strengthening of continuous beams with CFRP", Concrete Repair, Rehabilitation and Retrofitting II, London.
  16. Thorenfeldt, E., Tomaszewicz, A. and Jensen, J. (1987), "Mechanical properties of high strength concrete and application to design", Proceedings of the Symposium: Utilization of High-Strength Concrete, Stavanger, Norway, June.