The experimental investigation deals with the quasi-static and fatigue behavior of the bond between GFRP (glass fibre reinforced polymer) rebars and concrete. Eccentric pull-out test set-up was adopted to measure the effect of concrete cover and concrete mechanical properties. For cycling tests, the ratio R of the maximum load in the cycle to the static strength was also varied to estimate the fatigue re-sistance under different load levels. GFRP rebars were considered of diameter 8 mm. Specimens were cast with two different concrete classes and bars were positioned according to two concrete covers. Cyclic loading was performed with two load levels. Quasi-static results show similar shear strength for the different concrete covers and the shear strength increases with the concrete mechanical proper-ties. Cyclic tests provide a fatigue life exceeding one million cycles for the minimum load level con-sidered while for the maximum the number of cycles to failure extremely increase considering the higher concrete quality.
Experimental investigation of the static and fatigue bond behaviour of GFRP bars and concrete
VELJKOVIC, ANA;CARVELLI, VALTER;
2016-01-01
Abstract
The experimental investigation deals with the quasi-static and fatigue behavior of the bond between GFRP (glass fibre reinforced polymer) rebars and concrete. Eccentric pull-out test set-up was adopted to measure the effect of concrete cover and concrete mechanical properties. For cycling tests, the ratio R of the maximum load in the cycle to the static strength was also varied to estimate the fatigue re-sistance under different load levels. GFRP rebars were considered of diameter 8 mm. Specimens were cast with two different concrete classes and bars were positioned according to two concrete covers. Cyclic loading was performed with two load levels. Quasi-static results show similar shear strength for the different concrete covers and the shear strength increases with the concrete mechanical proper-ties. Cyclic tests provide a fatigue life exceeding one million cycles for the minimum load level con-sidered while for the maximum the number of cycles to failure extremely increase considering the higher concrete quality.File | Dimensione | Formato | |
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