Techno Press
You logged in as Techno Press

Advances in Concrete Construction
  Volume 1, Number 2, June 2013 , pages 163-185
DOI: https://doi.org/10.12989/acc.2013.1.2.163
 

A unified design procedure for preloaded rectangular RC columns strengthened with post-compressed plates
L. Wang and R.K.L. Su

 
Abstract
    The use of post-compressed plates (PCP) to strengthen preloaded reinforced concrete (RC) columns is an innovative approach for alleviating the effects of stress-lagging between the original column and the additional steel plates. Experimental and theoretical studies on PCP-strengthened RC columns have been presented in our companion papers. The results have demonstrated the effectiveness of this technique for improving the strength, deformability and ductility of preloaded RC columns when subjected to axial or eccentric compression loading. An original and comprehensive design procedure is presented in this paper to aid engineers in designing this new type of PCP-strengthened RC column and to ensure proper strengthening details for desirable performance. The proposed design procedure consists of five parts: (1) the estimation of the ultimate load capacity of the trengthened column, (2) the design of the initial pre-camber displacement of the steel plate, (3) the design of the vertical spacing of the bolts, (4) the design of the bearing ends of the steel plates, and (5) the calculation of the tightening force of the bolts. A worked example of the design of a PCP-strengthened RC column is shown to demonstrate the application of the proposed design procedure.
 
Key Words
    reinforced concrete column; pre-cambered steel plate; axial load capacity; design procedure; worked example
 
Address
L. Wang: College of Civil Engineering, Nanjing University of Technology, Nanjing, China
R.K.L. Su: Department of Civil Engineering, The University of Hong Kong, Hong Kong
 
References
    -acc0102004-
  1. Adam, J.M., Gimenez, E., Calderon, P.A., Pallares, F.J. and Ivorra, S. (2008), "Experimental study of beam column joints in axially loaded RC columns strengthened by steel angles and strips", Steel Compos. Struct., 8(4), 329-342.
  2. Adam, J.M., Ivorra, S., Gimenez, E., Moragues, J.J., Miguel, P., Miragall, C. and Calderon, P.A. (2007), "Behaviour of axially loaded RC columns strengthened by steel angles and strips", Steel Compos. Struct, 7(5), 405-419.
  3. Adam, J.M., Ivorra, S., Pallares, F.J., Gimenez, E. and Calderon, P.A. (2009), "Axially loaded RC columnsstrengthened by steel caging: Finite element modeling", Construct. Build. Mater., 23(6), 2265-2276.
  4. Adam, J.M., Ivorra, S., Pallares, F.J., Gimenez, E. and Calderon, P.A. (2009), "Axially loaded RC columnsstrengthened by steel caging", Proceeding of the ICE - Structures and Buildings, 162(3), 199-208.
  5. Adam, J.M., Ivorra, S., Pallares, F.J., Gimenez, E. and Calderon, P.A. (2008), "Column-joint assembly in RC columns strengthened by steel caging", Proceeding of the ICE - Structures and Buildings, 161(6), 337-348.
  6. Calderon, P.A., Adam, J.M., Ivorra, S., Pallares, F.J. and Gimenez, E. (2009), "Design strength of axiallyloaded RC columns strengthened by steel caging", Mater. Design, 30(10), 4069-4080.
  7. Cirtek, L. (2001), "RC columns strengthened with bandage – experimental programme and design recommendations", Construct. Build. Mater., 15(8), 341-349.
  8. Cirtek, L. (2001), "Mathematical model of RC banded column behaviour", Construct. Build. Mater., 15(8), 351-359.
  9. Collins, M.P. and Mitchell, D. (1991), Prestressed Concrete Structures, Prentice-Hall,NJ, USA.
  10. Ersoy, U., Suleiman, R. and Tankut, T. (1993), "Behavior of jacketed columns", ACI Struct. J., 90(3), 288-293.
  11. Frangou, M., Pilakoutas, K. and Dritsos, S. (1995), "Structural repair/strengthening of RC columns", Construct. Build. Mater., 9(5), 259-266.
  12. Garzón-Roca, J., Adam, J.M. and Calderón, P.A. (2011), "Behaviour of RC columns strengthened by steelcaging under combined bending and axial loads", Construct. Build. Mater., 25(5), 2402-2412.
  13. Garzón-Roca, J., Ruiz-Pinilla, J., Adam, J.M. and Calderón, P.A. (2011), "An experimental study on steel caged RC columns subjected to axial force and bending moment", Eng. Struct., 33(2), 580-590.
  14. Giménez, E., Adam, J.M., Ivorra, S. and Calderón, P.A. (2009), "Influence of strips configuration on the behaviour of axially loaded RC columns strengthened by steel caging and strips", Mater. Design, 30(10), 4103-4111.
  15. Giménez, E., Adam, J.M., Ivorra, S., Moragues, J.J. and Calderón, P.A. (2009), "Full-scale testing of axially loaded RC columns strengthened by steel angles and strips", Adv. Struct. Eng., 12(2),169 -181.
  16. Li, J., Gong, J.and Wang, L. (2009), "Seismic behavior of corrosion-damaged reinforced concrete columns strengthened using combined carbon fiber-reinforced polymer and steel jacket", Construct. Build. Mater., 23(7), 2653-2663.
  17. Montuori, R.and Piluso, V. (2009), "Reinforced concrete columns strengthened with angles and battens subjected to eccentric load", Eng. Struct., 31(2), 539-550.
  18. Park, R. and Paulay, T. (1975), Reinforced concrete structures, John Wiley & Sons publications, New York, NY, USA.
  19. Ramirez, J.L. (1996), "Ten concrete column repair methods", Construct. Build. Mater., 10(3), 195–202.
  20. Su, R.K.L. and Wang, L. (2012), "Axial strengthening of preloaded rectangular concrete columns by precambered steel plates", Eng. Struct., 38(5), 42-52.
  21. Takeuti, R.A., de Hanai, J.B. and Mirmiran, A. (2008), "Preloaded RC columns strengthened with high-strength concrete jackets under uniaxial compression", Mater. Struct., 41(7), 1251-1262.
  22. Timoshenko, S.P. and Gere, J.M. (1961), Theory of elastic stability, Mcgraw-Hill, New York, NY, USA.
  23. Wang, L. and Su, R.K.L. (2012a), "Experimental investigation of preloaded RC columns strengthened with precambered steel plates under eccentric compression loading", Adv. Struct. Eng., 15(8), 1253-1264.
  24. Wang, L. and Su, R.K.L. (2012b), "Theoretical and experimental study of plate-strengthened concrete columns under eccentric compression loading", J. Struct. Eng. ASCE, 139(3), 350-359.
  25. Yang, K.H. and Ashour, A.F. (2007), "Tests of reinforced concrete short columns laterally strengthened with wire rope units and steel elements", Magazine Conc. Res., 59(8), 547-557.
  26. Yang, K.H., Ashour, A.F. and Lee, E.T. (2009), "Axial behaviour of reinforced concrete short columns strengthened with wire rope and T-shaped steel plate units", Magazine Conc. Res., 61(2), 143-154.
 
Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2025 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: admin@techno-press.com