Hamed Arshadi
Developments in polymer technology have introduced new choices such as using fibers and fiber-reinforced polymers (FRP) to improve the impact behavior of concrete structures. In this research, 52 concrete samples (half of which wrapped with glass fiber-reinforced polymers-GFRP) with different compressive strengths (20, 30, and 40 MPa) and polypropylene fibers were constructed. These samples were subjected to weight dropping (46.7 kg and 66.8 kg). The number of weight droppings related to 30% weight loss was recorded. Results indicated that the impact resistance of the concrete samples, corresponding to the number of weight droppings, increased using higher-strength concrete, higher polypropylene ratios, or GFRP wrapping, separately and in application with each other. However, the effects of GFRP wrapping on the improvement of the impact resistance much higher than those of the polypropylene fibers or concrete strength.
Structures can be subjected to projectile penetration due to several incidents such as hurricanes, tsunamis, vehicle collisions, etc. As such, it is essential to research strategies to improve the impact resistance of RC structures.
RC structures may be exposed to impact loading during their lifetime. Then, it is essential to study the impact behavior of FRC wrapped with GFRP sheets and polypropylene fibers to find suitable strategies to improve the impact resistance of concrete members. This research studied the effects of polypropylene fibers and GFRP on the impact behavior of concrete samples. 52 concrete samples with different compressive strengths and with different fiber ratios were constructed and exposed to weight dropping. The observations demonstrated that the optimum fiber content ratio was 2%. Moreover, they indicated that the more appropriate strategy to improve the impact resistance of the concrete samples was using GFRP wrapping than using fibers with or without GFRP.
Semnan University of Medical Sciences and Health Services
Developments in polymer technology have introduced new choices such as using fibers and fiber-reinforced polymers (FRP) to improve the impact behavior…
