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Title: Behaviour of Distressed RC Beams Retrofitted By External Prestressing Using Trapezoidal Tendons
Authors: Manisekar, R
Sivakumar, P
Lakshmikandhan, K N
Keywords: Experiment;Modeling;RC Beams;Flexure;Strengthening;Retrofitting;External Prestressing
Issue Date: Sep-2018
Publisher: NISCAIR-CSIR, India
Abstract: Rectangular RC beams were tested before and after retrofitting by external Prestressing. RC beams of 150 mm x 275 mm section and 4 m length were subjected to monotonically increasing static two-point load and the cracks were induced to a limit such that the strain in reinforcing steel was around 85 % of the yield strain. Retrofitting by external Prestressing using trapezoidal tendons was done while the member was subjected to superimposed dead weight of a bridge girder, equivalent to 25 % of the ultimate load of the beam. Retrofitted beams were tested by monotonically increasing two-point load. It was observed that ultimate flexural capacity of the beam is increased by 59 %. Around 10 % of loss was observed due to the friction between tendon and deviators. An analytical model is developed and compared with experimental results.
Page(s): 520-524
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.77(09) [September 2018]

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