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Prediction of thermal cracking in concrete structures reinforced with GFRP

Research output: Contribution in Book/Report/ProceedingsAbstract

Published

Publication date06/2013
Host publicationFRPRCS-11: 11th International Symposiumn on Fibre Reinforced Polymer for Reinforced Concrete Structures
Editors Joaquim Barros
PublisherElsevier
Original languageEnglish

Conference

Conference11th International Symposium of Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS11)
CountryPortugal
CityGuimarães
Period26/06/1328/06/13

Conference

Conference11th International Symposium of Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS11)
CountryPortugal
CityGuimarães
Period26/06/1328/06/13

Abstract

A nonlinear finite element (NLFE) simulation using DIANA software [1] was performed in order to estimate the temperature which produced the first transverse crack at the bar surface and the corresponding tensile stress. It was also used to predict the extent and direction of the thermally induced cracking due to thermal incompatibility between the concrete and GFRP bars when the temperature increases. The NLFE results were verified by comparing the output of the proposed 2D NLFE model with experimental results. The results confirmed the influence of temperature variations on the state of stress within the GFRP reinforced concrete slabs, and the necessity for a recommended minimum concrete cover to avoid the formation of through cracks. The NLFE model generally shows good agreement with the experimental results for a concrete cover of 1.5 x bar diameter db.