This paper presents the test results of 14 concrete beams reinforced with two types of glassFRP composite bars: Sand-coated and Ribbed-deformed bars. The beams are 1800 mm long with arectangular cross-section of 130-mm width and 180-mm depth. The individual and coupled effects offreeze/thaw cycles and sustained bending stresses on the long-term behaviour of concrete beamsreinforced with GFRP composite bars were investigated. The beams were exposed to 300 freeze/thawcycles (-20 °C to +20 °C) either in an unstressed state or loaded in bending to 1.4 times of its crackingmoment (23% to 27% of the GFRP bare bar ultimate tensile strength). The conditioned beams weretested up to failure in a four-point bending set-up over a clear span of 1500 mm. The test results showedthat no significant effect for the coupled action of freeze/thaw cycles and sustained bending stresses onthe behaviour of the tested beams.
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