Open AccessBehavior and Failure Mode of GFRP bars RC Beams under Elevated Temperature
Author(s) -
Haitham AlThairy,
Nuha Hussien Al-hasnawi
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/888/1/012012
Subject(s) - fibre reinforced plastic , materials science , failure mode and effects analysis , beam (structure) , composite material , structural engineering , reinforced concrete , displacement (psychology) , maximum temperature , shear (geology) , glass fiber , engineering , physics , psychology , psychotherapist , thermodynamics
The presented work is providing the results of experimental study to investigate the impact of elevated temperature on load resistance related to the concrete beams that are reinforced via the glass fibre reinforced polymers (GFRPs). There are four GFRP reinforced concrete beams with width (250mm) and height (160mm) as cross-sectional dimensions, also (1250mm) as total length have been designed according to ACI440.1R-15[1], cast using normal weight concrete and considered in the experimental tests. One specimen has been put to test at ambient temperature, while other three specimens were firstly exposed to increased temperatures (350, 500, and 600 °C), after that subjected to a monolithically increased one point load up to failure. The effect of increased temperature on load displacement relationships as well as the failure modes regarding tested beams were discussed and put to comparison with the results related to the control beam (20°C). The experimental tests results have indicated that the shear failure is the pre-dominate failure mode with regard to all the tested GFRP-beams before and after exposing to elevated temperature. Results have also shown that in comparison to the control beam (20°C), reduction in loading capacity of heated reinforced concrete beams have been 4%, 15.5% and 19% when exposing to temperature of 350°C, 500°C and 600°C respectively.