Shahzad Khan, Samiullah Qazi,Ali Siddique, Muhammad Rizwan,Muhammad Saqib,



Reinforced concrete,Deficient wall,partial retrofit,CFRP fabric,cyclic loading ,


In this paper, the experimental results of a partially retrofitted non-compliant with code concrete shear wall using uni-directional carbon fibre reinforced polymer (CFRP) are introduced. The common deficiencies in the wall were insufficient reinforcement, un-confinement at boundary zone, the lake of in-plane stiffness, and ductility. The adopted retrofitting technique consists of the CFRP strips bonded to both wall face with mesh anchors installed in the wall panel and foundation to avoid debonding. The wall was tested before and after retrofitting under a constant axial load, and the displacement control lateral cyclic load was applied to the head beam level. The retrofitted wall showed satisfactory results in terms of drift and shear strength. The test results include the failure pattern, load-displacement behaviours, and deflected shape.    


I. ACI Committee 318 (2005) Building Code Requirements for Structural Concrete (ACI 318-05) and Commentary (318R-05). Farmington Hills, MI.
II. A.E. Fiorato and W.G. Corley, R. G. O. (no date) ‘Behavior of Earthquake Resistant Structural Walls Before and After Repair,’ ACI Journal Proceedings, 80(5). DOI: 10.14359/10864.
III. Building Code of Pakistan (BCP): Seismic Provisions (2007). Islamabad, Pakistan: Ministry of Housing & Works.
IV. Babak Mansoori, Ashkan Torabi, Arash Totonchi, : NUMERICAL INVESTIGATION OF STRENGTHENING THE REINFORCED CONCRETE BEAMS USING CFRP REBAR, STEEL SHEETS AND GFRP, J. Mech. Cont.& Math. Sci., Vol.-15, No.-3, March (2020) pp 195-204
V. Durga Chaitanya Kumar Jagarapu, Arunakanthi Eluru, : DURABILITY STUDIES ON LIGHTWEIGHT FIBER REINFORCED CONCRETE BY INCORPORATING PALM OIL SHELLS, J. Mech. Cont.& Math. Sci., Vol.-15, No.-1, January (2020) pp 19-30
VI. Effendy, E. et al. (2006) ‘Seismic behaviour of low-rise shear walls with SMA bars,’ Earth and Space 2006 – Proceedings of the 10th Biennial International Conference on Engineering, Construction, and Operations in Challenging Environments, 2006, p. 137. DOI: 10.1061/40830(188)137.
VII. Elnashai and Pinho (1997) ‘Repair and retrofitting of RC walls using selective Techniques,’ 2(4), pp. 525–568.
VIII. Khalid M. Mosalam and Michael Rojansky, S. A. M. (no date) ‘Evaluation of Seismic Performance and Retrofit of Lightweight Reinforced Concrete Shearwalls,’ ACI Structural Journal, 100(6). DOI: 10.14359/12835.
IX. Lombard, J., Lau, D. and Humar, J. (2000) ‘Seismic strengthening and repair of reinforced concrete shear walls,’ Proc., 12th World Conf. on …, pp. 1–8.
X. Pakravan, H. R. and Ozbakkaloglu, T. (2019) ‘Synthetic fibres for cementitious composites: A critical and in-depth review of recent advances’, Construction
XI. Qazi, S., Michel, L. and Ferrier, E. (2013) ‘Experimental investigation of CFRP anchorage systems used for strengthening RC joints,’ Composite Structures, 99, pp. 453–461. DOI: 10.1016/j.compstruct.2012.10.036.
XII. Raza, S. et al. (2019) ‘Strengthening and repair of reinforced concrete columns by jacketing: State-of-the-art review,’ Sustainability (Switzerland), 11(11). DOI: 10.3390/su11113208.
XIII. Sezen H.Whittaker A.S.Elwood K.J.and Mosalam K.M. (2003). Performance of reinforced concrete buildings during August 17, 1999, Kocaeli, Turkey earthquake and seismic design and construction practice in Turkey. Engineering Structures 25, 103–114
XIV. Taghdi et al. (2000) ‘SEISMIC RETROFITTING OF LOW-RISE MASONRY AND CONCRETE WALLS USING STEEL STRIPS,’ Taghdi et al., (September), pp. 1017–1025.
XV. UBC-97 (1997) ‘Uniform building code: Structural design requirement’, in.

View Download