Rehabilitation of Reinforced Concrete Columns

In recent years, rehabilitation has been the subject of extensive research due to increased spending on building work and repair of built works. In all cases, it is absolutely essential to carry out methods of strengthening or repair of structural elements, and that following an inspection analysis and methodology of a correct diagnosis. The reinforced concrete columns are important elements in building structures. They support the vertical loads and provide bracing against the horizontal loads. This research about the behavior of reinforced concrete rectangular columns, rehabilitated by concrete liner, confinement FRP fabric, steel liner or cage formed by metal corners. It allows comparing the contributions of different processes used perspective section resistance elements rehabilitated compared to that is not reinforced or repaired. The different results obtained revealed a considerable gain in bearing capacity failure of reinforced sections cladding concrete, metal bracket, steel plates and a slight improvement to the section reinforced with fabric FRP. The use of FRP does not affect the weight of the structures, but the use of different techniques cladding increases the weight of elements rehabilitated and therefore the weight of the building which requires resizing foundations.

• Madi Rafik
• Guenfoud Mohamed

• cladding
• Rehabilitation
• reinforced concrete columns
• confinement
• composite materials.

[1] Perfectionnemt sur les techniques de rehabilitation et de renforcement des structures, rencontres scientifiques, SOCOTEC-CTC, 2002.
[2] Earthquake resistant concrete structures : G. G. Penelis and A. G. Kappos, pp 572, E8 FN Spon, London, 1997.
[3] Catalogue des methodes de reparation et de renforcement, Centre de recherche appliquee en genie parasismique CGS, 1992.
[4] Madi R. Guenfoud M., "Rehabilitation des batiments en beton arme vis-a-vis du seisme", 2e1rie seminaire international: Innovation et valorisation en genie civil et materiaux de construction, INVACO 2, 23-25 Novembre 2011, Rabat, Maroc.
[5] Wu G., Lu Z. T. et Wu Z. S., "Strength and ductility of concrete cylinders confined with FRP composites", Construction and building materials, 2006, Vol. 20, p. 134-148.
[6] Promis G., Ferrier E, Hamelin P., "Effect of external FRP retrofitting on reinforced concrete short columns for seismic strengthening, Composite Structures", 2009, Vol. 88, p. 367-379.
[7] Tastani S. P., Pantazopoulou S. J., "Detailing procedures for seismic rehilitation on reinforced concrete members with fiber reinforced polymers", Engineering Structure, 2008, Vol. 30, p. 450-461.
[8] Nawy E. G., "Prestressed concrete, a fundamental approach", 4th Edition, Prentice Hall, 2003, pp. 939.
[9] Parvin A., Jamwal A. S., "Performance of externally FRP reinforced
columns for changes in angle and thickness of the wrap and concrete
strength", Composite Structures, 2006, Vol. 73, pp. 451-457.
[10] Rochette P., Labossiere P., "Axial testing of rectangular columns
modesls confined with composites", Journal of composite Construction,
ASCE, 2000, Vol. 4, Issue 3, pp. 129-136.
[11] Madi R. Guenfoud M., " Renforcement des poteaux en béton armé",
Congrès Algérien de mécanique CAM2011, 14-17 Novembre 2011,
Université 08 mai 45, Guelma, Algérie.
[12] Pristley M.J.N, Seible F., Xiao Y., and Verma R. (1994), "Steel Jacket
Retrofiting of Reinforced Concrete Bridjr Columns for Enhanced Shear
Strength-Part 1: Theoritecal Considerations and Test Design", ACI
Structural journal, 1994, vol. 91, pp. 394-405.
[13] COMITE EUROPEEN DE NORMALISATION, Eurocode 2: Calcul
des structures en béton-Partie 1: Règles générales et règles pour les
bâtiments, Afnor, 1992.
[14] CSI. SAP2000 V-11, Integrated finite element analysis and design of
structures basic analysis reference manual, Berkeley (CA, USA):
Computers and Structures Inc, section designer, 2007.