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Flexure and shear behaviour of damaged RC beams repaired by plate bonding

Hussain, Munawar (1992) Flexure and shear behaviour of damaged RC beams repaired by plate bonding. Masters thesis, King Fahd University of Petroleum and Minerals.

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The research regarding plate bonding technique presented here has been divided into flexure and shear parts. The research regarding flexure has been further classified into experimental and theoretical parts. In the flexure experimental part, first of all a large number of RC beams were damaged in flexure by giving 10 mm central deflection. Then these flexure damaged beams were repaired by bonding steel plates of different thicknesses on the bottom faces of the beams. In some of the plated beams end anchorage was given to the plates by anchor bolts. Beams repaired by 1.00 mm and 1.5 mm thick plates reached the theoretically predicted ultimate flexural strengths. Beams repaired by 2.00 mm and 3.00 mm thick plate could not reach the theoretically predicted ultimate flexural strengths. In general ductility was improved by giving end anchorage to the plates. The modes of failure of the beams repaired by 1.5 mm, 2.00 mm and 3.00 mm thick plates with and without end anchorage were due to the separation of the plates at the ends. In the theoretical study a computer program was written based on the partial interaction theory to determine the shear and peeling stresses at the interface in the epoxy bonded plated beams. This program can be used for designing plate size for strengthening RC beams in flexure such that separation of plates does not take place before the yielding of the plates. In the shear part of the research program, first of all, RC beams having insufficient shear reinforcement were damaged in shear under four point loading. Then these shear damaged beams were repaired by bonding jackets, U-strips, straight strips and wings respectively in the shear spans. All the shear repaired beams showed improvement in strength and ductility. However, the improvement in strength and ductility for the beams repaired by Jacket-A (full encasement of the shear span) was maximum.



Item Type:Thesis (Masters)
Date:July 1992
Date Type:Completion
Subjects:Civil Engineering
Divisions:College Of Engineering Sciences > Civil Engineering Dept
Creators:Hussain, Munawar
Committee Advisor:Basunbul, I. A.
Committee Members:Baluch, Mohammad H. and Sharif, Al-Farabi M. and Al-Sulaimani, Ghazi Jameel
ID Code:9971
Deposited By:KFUPM ePrints Admin
Deposited On:22 Jun 2008 16:53
Last Modified:25 Apr 2011 09:40

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