Prevention of debonding failure of intermediate anchor to eliminate premature shear failure of flexurally strengthened reinforced concrete beams

Alam, M.A. and Jumaat, M.Z. (2015) Prevention of debonding failure of intermediate anchor to eliminate premature shear failure of flexurally strengthened reinforced concrete beams. Arabian Journal for Science and Engineering, 40 (8). pp. 2219-2232. ISSN 1319-8025

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Abstract

This research proposed an optimal method of intermediate anchor to prevent premature debonding failure of anchor plate for eliminating premature shear failure of CFRP laminate flexurally strengthened reinforced concrete (RC) beam. In the experimental programme, seven RC beam specimens were prepared which included un-strengthened control beam and flexurally strengthened beams with CFRP laminate. The flexurally strengthened beams were further shear strengthened using L-shaped intermediate anchors based on proposed and conventional methods. The experimental results of specimens were compared with the numerical results. Theoretical model had also been proposed to predict the debonding failure of intermediate anchors. Results showed that the anchors obtained based on the proposed design guideline prevented premature debonding failure of anchor plates completely and thus, the proposed intermediate anchored strengthened beams did not show premature shear failures. Whereas beams having the anchor plates based on conventional method failed by premature debonding of anchor plates followed by premature shear. The proposed intermediate anchors significantly increased the ultimate loads and ductility of the beams as compared to conventional one. It also reduced the number and widths of cracks in shear span. The theoretical model could predict the debonding failure load of intermediate anchor which was comparable with the experimental finding. Finally, numerical model predicted the structural behaviour of proposed intermediate anchored strengthened beams satisfactorily.

Item Type: Article
Additional Information: ISI Document Delivery No.: CM5RO Times Cited: 0 Cited Reference Count: 21 Cited References: Adhikary BB, 2004, ACI STRUCT J, V101, P660 Alsayed SH, 2013, CONSTR BUILD MATER, V42, P238, DOI 10.1016/j.conbuildmat.2013.01.024 Aram MR, 2008, COMPOS PART B-ENG, V39, P826, DOI 10.1016/j.compositesb.2007.10.006 Bae SW, 2013, J BRIDGE ENG, V18, P99, DOI 10.1061/(ASCE)BE.1943-5592.0000332 Bahn BY, 2008, J COMPOS CONSTR, V12, P387, DOI 10.1061/(ASCE)1090-0268(2008)12:4(387) Belarbi A, 2013, PROCEDIA ENGINEER, V57, P2, DOI 10.1016/j.proeng.2013.04.004 Bencardino F, 2007, CONSTR BUILD MATER, V21, P1997, DOI 10.1016/j.conbuildmat.2006.05.056 Dong JF, 2013, COMPOS PART B-ENG, V44, P604, DOI 10.1016/j.compositesb.2012.02.018 El-Mihilmy MT, 2001, ACI STRUCT J, V98, P301 fib, 2001, FIB B, V14 Grace NF, 2001, ACI STRUCT J, V98, P347 Jumaat MZ, 2010, INT J PHYS SCI, V5, P132 Jumaat M Z, 2009, Journal of Applied Sciences, V9, DOI 10.3923/jas.2009.142.148 Kim YJ, 2008, J COMPOS CONSTR, V12, P44, DOI 10.1061/(ASCE)1090-0268(2008)12:1(44) Koutas L, 2013, J COMPOS CONSTR, V17, P101, DOI 10.1061/(ASCE)CC.1943-5614.0000316 Li LJ, 2006, CONSTR BUILD MATER, V20, P901, DOI 10.1016/j.conbuildmat.2005.06.020, 10.1016/j.conbuildmat..2005.06.020 Malek AM, 1998, ACI STRUCT J, V95, P391 Smith ST, 2001, ENG STRUCT, V23, P857, DOI 10.1016/S0141-0296(00)00090-0 Swamy RN, 1999, P I CIVIL ENG-STR B, V134, P301 Teng J., 2002, FRP STRENGTHENED RC, V1st Tounsi A, 2009, INT J ADHES ADHES, V29, P343, DOI 10.1016/j.ijadhadh.2008.06.008 Alam, Md Ashraful Jumaat, Mohd Zamin Pusat Pengurusan Geran Penyelidikan, IPPP, University of Malaya under PRPUM The authors would like to thank the Pusat Pengurusan Geran Penyelidikan, IPPP, University of Malaya to provide fund under PRPUM 2013 to conduct this research. Thanks are also due to Sika Kimia and their staff for providing the technical and materials supports for this work. The authors would also like to express their gratitude to whomsoever had contributed to this work either directly or indirectly. 0 SPRINGER HEIDELBERG HEIDELBERG ARAB J SCI ENG
Uncontrolled Keywords: Premature shear, intermediate anchor, debonding, design guideline, rc beams, interfacial stresses, cfrp sheets, t-beams, frp, behavior, systems, strips, plates,
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 03 Mar 2016 01:13
Last Modified: 04 Oct 2017 08:06
URI: http://eprints.um.edu.my/id/eprint/15668

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