Repair of reinforced concrete deep beams using post-tensioned CFRP rods

A repair method for reinforced concrete deep beams with external unbonded post-tensioned carbon fiber reinforced polymer (CFRP) rods is presented. Reinforced concrete deep beams in this research were pre-damaged to simulate reinforced concrete girder webs with diagonal cracks. Experimental data and...

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Published in:	Composite structures Vol. 125; pp. 256 - 265
Main Authors:	Burningham, Clayton A., Pantelides, Chris P., Reaveley, Lawrence D.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-07-2015
Subjects:	Beams (structural) Carbon fiber reinforced plastics CFRP rod Concrete Deep beam Mathematical analysis Mathematical models Post-tensioning Reinforced concrete Repair Rods Shear Strut and tie models Concrete Deep beam Shear Repair Post-tensioning CFRP rod
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Abstract	A repair method for reinforced concrete deep beams with external unbonded post-tensioned carbon fiber reinforced polymer (CFRP) rods is presented. Reinforced concrete deep beams in this research were pre-damaged to simulate reinforced concrete girder webs with diagonal cracks. Experimental data and analytical methods for predicting the ultimate capacity of reinforced concrete deep beams which include the effect of externally post-tensioned CFRP rods are examined. The ultimate load capacity of the repaired beams was increased compared to the nominal capacity of the control beam while the deflection capacity remained the same. Strut-and-tie models of the control and repaired reinforced concrete deep beams predicted the ultimate load capacity with reasonable accuracy. The strut-and-tie models were optimized to reduce the ratio of experimental to analytical ultimate load capacity.
AbstractList	A repair method for reinforced concrete deep beams with external unbonded post-tensioned carbon fiber reinforced polymer (CFRP) rods is presented. Reinforced concrete deep beams in this research were pre-damaged to simulate reinforced concrete girder webs with diagonal cracks. Experimental data and analytical methods for predicting the ultimate capacity of reinforced concrete deep beams which include the effect of externally post-tensioned CFRP rods are examined. The ultimate load capacity of the repaired beams was increased compared to the nominal capacity of the control beam while the deflection capacity remained the same. Strut-and-tie models of the control and repaired reinforced concrete deep beams predicted the ultimate load capacity with reasonable accuracy. The strut-and-tie models were optimized to reduce the ratio of experimental to analytical ultimate load capacity.
Author	Reaveley, Lawrence D. Pantelides, Chris P. Burningham, Clayton A.
Author_xml	– sequence: 1 givenname: Clayton A. surname: Burningham fullname: Burningham, Clayton A. email: cburningham@outlook.com organization: Reaveley and Associates, Salt Lake City, UT 84102, USA – sequence: 2 givenname: Chris P. surname: Pantelides fullname: Pantelides, Chris P. email: c.pantelides@utah.edu organization: Dept. of Civil and Envir. Eng., Univ. of Utah, Salt Lake City, UT 84112, USA – sequence: 3 givenname: Lawrence D. surname: Reaveley fullname: Reaveley, Lawrence D. email: larry.reaveley@utah.edu organization: Dept. of Civil and Envir. Eng., Univ. of Utah, Salt Lake City, UT 84112, USA
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Cites_doi	10.1061/(ASCE)1084-0702(2008)13:1(15) 10.1061/(ASCE)1090-0268(2002)6:4(249) 10.15554/pcij.01012014.103.113 10.1061/(ASCE)CC.1943-5614.0000166 10.1139/l05-071
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SubjectTerms	Beams (structural) Carbon fiber reinforced plastics CFRP rod Concrete Deep beam Mathematical analysis Mathematical models Post-tensioning Reinforced concrete Repair Rods Shear Strut and tie models
Title	Repair of reinforced concrete deep beams using post-tensioned CFRP rods
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