Strengthening of R.C. beams using externally bonded plates and anchorages

Jumaat, Mohd Zamin and Alam, Md Ashraful (2009) Strengthening of R.C. beams using externally bonded plates and anchorages. Australian Journal of Basic and Applied Sciences, 3 (3). pp. 2207-2211. ISSN 1991-8178,

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Abstract

This paper presents a study on strengthened reinforced concrete beams using externally bonded plates and anchorages. Strengthening materials and methods, failure modes of strengthened beams, effect of end anchorages and effect of intermediate anchorages are reviewed. An experimental programme to evaluate the structural behaviour of anchored steel plate and CFRP laminate flexurally strengthened reinforced concrete beams is also reported. A total of five beams, each 2300 mm long, 125 mm wide, and 250 mm deep, were fabricated and tested. One beam was left un-strengthened to act as the control beam, two beams were strengthened with steel plate and another two beams were strengthened with CFRP laminate. From each of the steel plate and CFRP laminate strengthened beams, one beam was left unanchored and another beam was anchored at the end and shear spans (intermediate anchored) by L shape plates to avoid premature failure. The experimental results overall showed that the strengthened beams had higher failure loads and good failure modes over the control beam. Results also illustrated that the end with intermediate anchored strengthened beams gave higher failure loads and better failure modes compared to unanchored strengthened beams.

Item Type:	Article
Funders:	UNSPECIFIED
Additional Information:	Export Date: 6 January 2013 Source: Scopus Language of Original Document: English Correspondence Address: Alam, M. A.; Dept. of Civil Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: ashrafarif2003@yahoo.com References: Smith, S.T., Teng, J.G., FRP-strengthened RC beams. I: Review of debonding strength models (2002) Engineering Structures, 24, pp. 385-395; Jones, R., Swamy, R.N., Charif, A., Plate separation and anchorage of reinforced concrete beams strengthened by epoxy-bonded steel plates (1988) The Structural Engineering, 66 (5), pp. 85-94; Ritchie, P.A., Thomas, D.A., Lu, L., Connelly, G.M., External reinforcement of concrete beams using fiber reinforced plastics (1991) ACI Structural Journal, pp. 490-500; Sharif, A., Al-Sulaimani, G.J., Basunbul, I.A., Baluch, M.H., Ghaleb, B.N., Strengthening of initially loaded reinforced concrete beams using FRP plates (1994) ACI Structural Journal, 91 (2), pp. 160-168; Hussain, M., Sharif, A., Basunbul, A., Baluch, M.H., Al-Aulaimani, G.J., Flexural Behavior of Precracked Reinforced Concrete Beams Strengthened Externally by Steel Plates (1995) ACI Structural Journal, 92 (1), pp. 14-22; Garden, H.N., Quantrill, R.J., Hollaway, L.C., Thorne, A.M., Parke, G.A.R., An experimental study of the anchorage length of carbon fibre composite plates used to strengthen reinforced concrete beams (1998) Construction and Building Materials, 12, pp. 203-219; Swamy, R.N.P., Debonding of carbon-fibre-reinforced polymer plate from concrete beams (1999) Proc. Instn Civ. Engrs Structs and Bldgs, 134, pp. 301-317. , Mukhopadhaya; Adhikary, B.B., Mutsuyoshi, H., Numerical simulation of steel-plate strengthened concrete beam by a non-linear finite element method model (2002) Construction and Building Materials, 16, pp. 291-301; Xiong, G.J., Jiang, X., Liu, J.W., Chen, L., A way for preventing tension delamination of concrete cover in midspan of FRP strengthened beams (2007) Construction and Building Materials, 21, pp. 402-408; Diagana, C., Li, A., Gedalia, B., Delmas, Y., Shear strengthening effectiveness with CFF strips (2003) Engineering Structures, 25, pp. 507-516
Uncontrolled Keywords:	Anchors, Beam, Debonding, Plate, Reinforced concrete, Strengthening
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Engineering
Depositing User:	Mr Jenal S
Date Deposited:	13 May 2013 02:06
Last Modified:	14 Nov 2019 01:47
URI:	http://eprints.um.edu.my/id/eprint/6081

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