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Effects of Load Level on the Structural Fire Behaviour of GFRP-Reinforced Concrete Beams with Straight-End bar Lap Splices
Over the past two decades, glass fiber-reinforced polymer (GFRP) has been utilized as an alternative reinforcing material to steel in concrete structures. Due to the superior corrosion resistance and high strength-to-weight ratio of GFRP they are considered as economical alternatives to reinforce various concrete structural elements. However, fire safety consideration often limits the utilization of GFRP bars as reinforcement in concrete structures. This paper presents the results of an experimental investigation on the effects of applied load level on the structural behaviour of GFRP-reinforced concrete beams when exposed to standard fire. The study involved two 2750-mm long concrete beams of 300 mm × 350 mm cross-sectional dimensions. Both beams had straight-end bar lap splices located at the beam midspan. Beams were designed as per CSA-S806 standard, and the fire tests were conducted in compliance with CAN/ULC S101 standard. Each beam was subjected to 85% of the beam ultimate design load. The experimental results and time to failure of the two beams when subjected to standard fire exposure were compared to those of identical beams subjected to only 40% of the beam ultimate design load in a prior related experimental study. Unpredictably, experimental results show that increasing the applied load level from 40% to 85% did not affect the fire resistance time of the GFRP-reinforced beams with straight-end bar lap splices.
Effects of Load Level on the Structural Fire Behaviour of GFRP-Reinforced Concrete Beams with Straight-End bar Lap Splices
Over the past two decades, glass fiber-reinforced polymer (GFRP) has been utilized as an alternative reinforcing material to steel in concrete structures. Due to the superior corrosion resistance and high strength-to-weight ratio of GFRP they are considered as economical alternatives to reinforce various concrete structural elements. However, fire safety consideration often limits the utilization of GFRP bars as reinforcement in concrete structures. This paper presents the results of an experimental investigation on the effects of applied load level on the structural behaviour of GFRP-reinforced concrete beams when exposed to standard fire. The study involved two 2750-mm long concrete beams of 300 mm × 350 mm cross-sectional dimensions. Both beams had straight-end bar lap splices located at the beam midspan. Beams were designed as per CSA-S806 standard, and the fire tests were conducted in compliance with CAN/ULC S101 standard. Each beam was subjected to 85% of the beam ultimate design load. The experimental results and time to failure of the two beams when subjected to standard fire exposure were compared to those of identical beams subjected to only 40% of the beam ultimate design load in a prior related experimental study. Unpredictably, experimental results show that increasing the applied load level from 40% to 85% did not affect the fire resistance time of the GFRP-reinforced beams with straight-end bar lap splices.
Effects of Load Level on the Structural Fire Behaviour of GFRP-Reinforced Concrete Beams with Straight-End bar Lap Splices
Lecture Notes in Civil Engineering
Benmokrane, Brahim (Herausgeber:in) / Mohamed, Khaled (Herausgeber:in) / Farghaly, Ahmed (Herausgeber:in) / Mohamed, Hamdy (Herausgeber:in) / Gurung, Sobita (Autor:in) / Salem, Osama (Autor:in)
8th International Conference on Advanced Composite Materials in Bridges and Structures ; Kapitel: 10 ; 85-92
14.09.2022
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Behaviour of reinforced GFRP bars concrete beams having strengthened splices using CFRP sheets
| SAGE Publications | 2021
Lapped splices in reinforced concrete beams
| Engineering Index Backfile | 1955