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AuthorYounis, Adel
AuthorEbead, Usama A
Available date2020-07-09T21:13:32Z
Publication Date2019
Publication NameISEC 2019 - 10th International Structural Engineering and Construction Conference
AbstractThis paper is aimed at studying the bond and shear-strengthening performance of fabric reinforced cementitious matrix (FRCM) systems. Three FRCM systems were compared, namely, polyparaphenylene benzobisoxazole (PBO)-FRCM, Carbon-FRCM, and Glass-FRCM. At first, six double-shear specimens were tested to investigate the FRCM/concrete bond, with the test variables including the fabric type and the bond length. After that, seven shear-critical reinforced concrete (RC) beams were tested under three-point loading, considering the fabric type and strengthening configuration (full/intermittent) as the test variables. As for the double-shear test results, the failure observed was fabric/matrix debonding in carbon-FRCM, matrix/concrete debonding in PBO-FRCM, and fabric rapture in glass-FRCM. The FRCM/concrete bond increased with the bonded length, and the PBO-FRCM showed the highest bond to concrete. Regarding the RC beam tests, the FRCM-strengthened beams showed the same failure mode that is debonding at the FRCM/concrete interface. Nonetheless, FRCM had successfully strengthened the beams in shear: an average gain of 57% in the load carrying capacity was achieved as compared to the non-strengthened reference. Indeed, the full-length strengthening resulted in a better structural improvement compared to the intermittent-strengthening configuration. Amongst the three systems, carbon-FRCM systems were the most efficient in shear-strengthening RC beams.
SponsorThis paper was made possible by Internal grant # QUST-CENG-SPR-14/15-15 "Textile reinforced mortar for shear strengthening of reinforced concrete beams" from Qatar University.
PublisherISEC Press
SubjectBond capacity
SubjectFabric-reinforced cementitious matrix
SubjectTextile-reinforced mortar
TitleBond and shear-strengthening performance of FRCM composites
TypeConference Paper

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