STR-828: BEHAVIOR OF CIRCULAR FRP-REINFORCED CONCRETE COLUMNS UNDER ECCENTRIC LOADING

This paper presents the results of an investigation of the eccentric compression behavior of three full-scale circular concrete columns reinforced with the glass-fiber-reinforced polymer (GFRP) bars and spirals. The column specimens measured 1500 mm height, 305 mm diameter and were tested under monotonic eccentric loading. The main variable was the eccentricity-to-dimeter ratio. Three values were considered in this study (8.20%, 16.39%, and 65.57%). The failure mechanism was changeable according to the level of the applied eccentricity. The failure mechanism of columns at small eccentric loading was defined as compression-controlled due to concrete crushing. At high eccentric loading, the failure of the column cannot simply be characterized by a compression failure, it was rather controlled by the properties of the GFRP bars. The test results were plotted to obtain the experimental P-M interaction diagram. Finally, the experimental results were analyzed and compared with predicted results