Structural performances of thermally conditioned PBO FRCM confined concrete cylinders

• Published in: Composite structures Vol. 176; pp. 1096 - 1106
• Main Author: Ombres, Luciano
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.09.2017
• Subjects: Cement-based system; Composites; Concrete confinement; Temperature; Composites; Temperature; Concrete confinement; Cement-based system
• ISSN: 0263-8223; 1879-1085
• DOI: 10.1016/j.compstruct.2017.06.026

The performances of plain concrete elements confined with PBO (short of Polypara-phenylene-benzo-bisthiazole) fabric meshes embedded into an inorganic stabilized cementitious matrix (Fabric Reinforced Cementitious Mortar, FRCM) and subjected to thermal conditioning are analysed in the paper. The analysis is developed by results of compression tests on PBO-FRCM wrapped plain concrete cylindrical specimens. Parameters varied were the fibres reinforcement ratio, the concrete strength and the temperature value, ranging from 20°C (ambient temperature) to 250°C, used for the thermal conditioning of specimens. The effects of the thermal conditioning on the structural response of confined cylinders have been analysed in terms of failure modes, peak strength, axial and transversal (hoop) strains, and ductility. Test results were used to define an empirical coefficient that accounts for the thermal conditioning effects in design models commonly adopted to predict the peak strength and the corresponding strain of the PBO-FRCM wrapped specimens.