The Impact Resistance of Concrete Beams Externally Reinforced with Non Woven Fabric.(Dept.C)

El-Hadidy, Adel Mohamed Ali; Reheem, A. H. Abdel; Shaheen, H.

doi:10.21608/bfemu.2021.173717

Cited by 1 publication

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“…In order to evaluate the absorbed energy for destroying the beam, the equivalent static method is proposed [ 17 ]. After comparing the simplified analytical and experimental results from drop hammer impact three-point bending tests, the effectiveness of this method was verified by El-Hadidy [ 18 ]. Zhang [ 9 ] and Ruiz [ 19 ] conducted the three-point bending tests for notched fiber reinforced concrete beams and high strength concrete beams with a drop hammer machine, and then discussed the effect of the impact velocity on the dynamic fracture energy.…”

Section: Introductionmentioning

confidence: 99%

Influence of Bonding Area on Dynamic Failure Behavior of Notched Reinforced Concrete Beams

et al. 2023

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To study the effect of the bonding area on the dynamic failure process of a reinforced concrete beam with the same reinforcement ratio, the experimental and numerical researches on the impact response of notched reinforced concrete beams in the low-velocity regime (≤2.5 m/s) are presented. The tests are carried out with a drop hammer impact testing machine and then the structural responses under different impact velocities are analyzed. Additionally, the dynamic three-point bending simulation for specimens with different bonding areas, but the same reinforcement ratio is conducted. In this numerical model, the parameters of a cohesive model verified from a steel bar pullout test are applied to the bonding layer to simulate the bond-slip behavior of steel bars. Then, the energy dissipation for each component (e.g., concrete, a steel bar, and the bonding layer) are compared and discussed. The dynamic experimental results suggest that the energy absorbed during the impact process increases with the growth of the impact velocity, while the effect of the impact velocity on the reaction force can be ignored. The numerical results indicate that the failure pattern changes from a bending failure to shear failure with the increase in the bonding area and impact velocity. With the growth of the bonding area, the steel bars reach the plastic stage easily and the internal energy dissipation of the bonding layer decreases, which protects the bonding effect between the steel bar and concrete effectively.

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Section: Introductionmentioning

confidence: 99%