American Journal of Civil Engineering
Volume 3, Issue 2-2, March 2015, Pages: 38-43
Received: Jan. 21, 2015;
Accepted: Jan. 22, 2015;
Published: Mar. 24, 2015
Views 3032 Downloads 321
Seyyed Mohammad Banijamali, Dept. of Civil Engineering, Ferdowsi University of Mashhad (FUM), Mashhad, Iran
Mohammad Reza Esfahani, Dept. of Civil Engineering, Ferdowsi University of Mashhad (FUM), Mashhad, Iran
Shoeib Nosratollahi, Dept. of Civil Engineering, University of Sistan and Baluchestan (USB), Zahedan, Iran
Mohammad Reza Sohrabi, Dept. of Civil Engineering, University of Sistan and Baluchestan (USB), Zahedan, Iran
Seyyed Roohollah Mousavi, Dept. of Civil Engineering, University of Sistan and Baluchestan (USB), Zahedan, Iran
Several methods have been invented for flexural strengthening of RC beams using the FRP materials in recent years. These techniques are categorized into two main groups: Externally Bonded Reinforcement (EBR) techniques and Near Surface Mounted (NSM) techniques. The EBR family contains EBR (with conventional surface preparation), EBROG, EBRIG, MF-EBR, HOLING methods. The NSM family contains NSM-FRP Rods, NSM-FRP Sheets, NSM-MMFRP Rods methods. The EBR family techniques Despite the ease of implementation have weaknesses such as vulnerability against sever environmental conditions. Although the NSM techniques, have longer installation time than the EBR family techniques but in these methods the strengthening materials are greatly protected against the environmental effects. In this paper, the various techniques for flexural strengthening of RC members from both the EBR and NSM families have been fully described and advantages and disadvantages of each technique have been discussed.
Seyyed Mohammad Banijamali,
Mohammad Reza Esfahani,
Mohammad Reza Sohrabi,
Seyyed Roohollah Mousavi,
Reviewing the FRP Strengthening Systems, American Journal of Civil Engineering. Special Issue: Research and Practices of Civil Engineering in Developing Countries.
Vol. 3, No. 2-2,
2015, pp. 38-43.
A. Carolin, "Carbon Fiber Reinforced Polymers for Strengthening of Structural Elements," Doctoral Thesis, Lulea University of Technology, Sweden, p. 247, 2003.
H. Nordin, " Fiber Reinforced Polymers in Civil Engineering," PhD. Thesis, Lulea University of Technology, Sweden, p. 57, 2003.
S. M. Soliman, "Flexural Behaviour of Reinforced Concrete Beams Strengthened with Near Surface Mounted FRP Bars," Ph.D Thesis, University of Sherbrooke, Sherbrooke, Quebec, Canada, p. 12, 2008.
M. Arduini, A. Nanni, "Behavior of Precracked RC Beams Strengthened with Carbon FRP Sheets," Journal of Composites for Construction, Vol. 1, No. 2, pp. 63–70, 1997.
D. M. Nguyen, T. K. Chan,H. K. Cheong, "Brittle Failure and Bond Development Length of CFRP-Concrete Beams, " ASCE, Journal of Composites for Construction, Vol. 1, No. 5, pp. 7-12, 2001.
P. Mukhopadhyaya, N. Swamy, "Interface Shear Stress: A New Design Criterion for Plate Debonding," ASCE, Journal of Composites for Construction, Vol. 1, No. 5, pp. 35-43, 2001.
N. F. Grace, G. A. Sayed, A. K. Soliman, K. R. Saleh, "Strengthening of Reinforced Concrete Beams Using Fiber Reinforced Polymer (FRP) Laminates," Journal of Structures, ACI, Vol. 5, No. 96, pp. 865-74, 1999.
D. Mostofinejad, E. Mahmoudabadi, "Grooving as an Alternative Method of Surface Preparation to Postpone Debonding of FRP Laminates in Concrete Beams," Journal of Composites for Construction, ASCE, V. 6, No. 14, pp. 804-11, 2010.
D. Mostofinejad, S. M. Shameli, "Externally Bonded Reinforcement In Grooves (EBRIG) Technique to Postpone Debonding of FRP Sheets in Strengthened Concrete Beams," Journal of Construction and Building Materials, Vol. 38, pp. 751-758, 2013.
F. Micelli, A. Rizzo, D. Galati, "Anchorage of Composite Laminates in RC Flexural," Journal of Composites for Construction,Vol. 3, No. 11, pp. 117-26, 2010.
J. M. Sena-Cruz, J. A. O. Barros, M. R. F. Coelho, L. F. F. T. Silva, "Efficiency of Different Techniques in Flexural Strengthening of RC Beams under Monotonic and Fatigue Loading," Construction and Building Materials, No. 29, pp. 175-182, 2012.
M. R. Eftekhar, M. Yaqubi, "Holing method to postpone debonding in strengthened RC beams with FRP," 4th annual national conference of concrete, Iran, 2012.
A. Hajihashemi, D. Mostofinejad, M. Azhari, "Investigation of RC Beams Strengthened with Prestressed NSM CFRP Laminates," ASCE, Journal of Composites for Construction, Vol. 6, No. 15, pp. 887-95, 2011.
L. De Lorenzis, A. Nanni, "Shear Strengthening of Reinforced Concrete Beams with Near-Surface Mounted FRP Rods," ACI Structural Journal, Vol. 98, No. 1, pp. 60-68, 2001.
A. Rizzo, L. De Lorenzis, "Behavior and capacity of RC beams strengthened in shear with NSM FRP reinforcement," Journal of Composites for Construction, Vol. 5, No. 2, p. 114, 2001.
M. Jalali, M. K. Sharbatdar, J. Fei-Chen, F. Jandaghi Alaee, "Shear Strengthening of RC Beams Using Innovative Manually Made NSM FRP Bars," Construction and Building Materials Journal,Vol. 36, pp. 990-1000, 2011.