This paper presents the results of an experimental investigation performed on thermally-conditioned FRCM specimens. Direct tensile (DT) and single-lap direct shear (DS) tests were carried out on FRCM coupons and FRCM-to-concrete joints, respectively. Specimens were exposed to heating and cooling down regimes and then tested at room temperature. This investigation aims to evaluate the influence of several parameters such as temperature values (from 20°C to 300°C) and type of reinforcement, namely PBO (short of polyparaphenylene benzobisoxazole) fibers, on the mechanical response of the composite systems. The obtained results allow to define analytical relationships, which can be used as input data for the thermomechanic simulation of concrete beams or slabs strengthened with PBO-FRCM systems and for design purposes.
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