The effect of elevated temperatures on the compressive section capacity of pultruded GFRP profiles.

• The influence of cross-sectional, slenderness, elevated temperatures on the compression behavior of the GFRP pultruded profiles were studied. • It was observed that the capacity of GFRP pultruded profiles had been lost considerably as the temperature exceeded 120 °C. • It was concluded that the degradation trend of all the profiles capacity at elevated temperature was the same, a sudden drop near transition temperature, i.e., 90 °C, and a constant part at the temperature higher than 120 °C. • The specimens with the greater cross-sectional area to external perimeter showed higher compressive strength at elevated temperatures. • According to the results of ANOVA, the cross-section area to external perimeter ratio had the most impact on the performance of GFRP pultruded profiles at temperatures ranging from 25 to 90 °C and also from 120 to 400 °C. • The model form was proposed to predict the capacity degradation factor of GFRP pultruded profiles at elevated temperatures. The compressive performance of glass fiber reinforced polymer (GFRP) profiles subjected to elevated temperature was investigated through a large number of (3 0 0) tests. The effects of profile cross-sectional area, slenderness, and temperature on the behavior of the GFRP profiles at temperatures ranging from 25 to 400 °C were determined. It was observed that the compressive strength of the GFRP profiles has been decreased by half as the temperature exceeded 90 °C, i.e., close to the glass transition temperature of the matrix. The temperature and ratio of cross-sectional area to external perimeter were determined as two major parameters affecting section capacity. [ABSTRACT FROM AUTHOR]