CUED Publications database

Behavior of RC beams retrofitted with CARDIFRC after thermal cycling

Farhat, FA and Nicolaides, D and Kanellopoulos, A and Karihaloo, BL (2010) Behavior of RC beams retrofitted with CARDIFRC after thermal cycling. Journal of Materials in Civil Engineering, 22. pp. 21-28. ISSN 0899-1561

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This study investigates the effect of thermal cycling on the performance of concrete beams retrofitted with CARDIFRC, a new class of high performance fiber-reinforced cement-based material that is compatible with concrete. Twenty four beams were subjected to 24 h thermal cycles between 25 and 90°C. One third of the beams were reinforced either in flexure only or in flexure and shear with conventional steel reinforcement and used as control specimens. The remaining sixteen beams were retrofitted with CARDIFRC strips to provide external flexural and/or shear strengthening. All beams were exposed to a varied number of 24 h thermal cycles ranging from 0 to 90 and were tested in four-point bending at room temperature. The tests indicated that the retrofitted members were stronger and stiffer than control beams, and more importantly, that their failure initiated in flexure without any signs of interfacial delamination cracking. The results of these tests are presented and compared to analytical predictions. The predictions show good correlation with the experimental results. © 2010 ASCE.

Item Type: Article
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:13
Last Modified: 13 Apr 2021 07:47
DOI: 10.1061/(ASCE)MT.1943-5533.0000008