Effect of impact velocity on the failure modes of a RC beam

Cheng, J. S.; Wen, He

doi:10.1016/j.ijimpeng.2021.104061

Cited by 13 publications

(3 citation statements)

References 25 publications

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“…A similar phenomenon was observed in Refs. [8,9,35]. The crack propagation of CFC panel-strengthened RC beams seems to spread widely in comparison with conventional RC beams, which demonstrates that the crack reduction of the midspan was achieved by the CFC panel-strengthened RC beams.…”

Section: Failure Mode and Crack Propagationmentioning

confidence: 92%

“…RC beams suffer from two main failure modes: flexural failure [3,4] and shear failure [5,6]. The failure mode of RC beams with stirrups under low-to-high impact velocities was investigated by Fujikake et al [7] and Cheng and Wen [8]. The authors investigated the relationship between the impact velocity and the failure mode of RC beams, and the results demonstrate that the failure mode of RC beams tends to change from bending to shear when the impact velocity increases.…”

Section: Introductionmentioning

confidence: 99%

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Strengthening of RC Beams with CFC Panels for Improving Impact Resistance

Senesavath,

Tamai,

et al. 2023

Applied Sciences

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In this study, continuous fiber composite (CFC) panels were used as a strengthening material to improve the impact resistance of reinforced concrete (RC). Both experimental tests and numerical analyses were carried out to investigate the impact resistance of RC beams strengthened with CFC panels. The experiments involved repeated drop-weight impact tests at constant speed. The experimental results confirm that the strengthening of RC beams with CFC panels improves the impact resistance, thereby increasing the number of repeated impacts that can be allowed before a specified residual displacement is reached. In addition, a virtual particle model based on the conventional smoothed particle hydrodynamics (SPH) method, which takes into account the mechanical properties of the adhesive, was introduced as an analytical method to simulate the impact fracture behavior of RC beams strengthened with CFC panels. The analysis results show that the improved SPH method proposed in this study can accurately reproduce the impact behavior of RC beams strengthened with CFC panels and predict the allowable number of repeated impacts. Furthermore, a parametric study was carried out using a validated analytical approach to compare the load-bearing capacity and discuss the impact performance of RC beams with three types of CFC panel reinforcement.

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Section: Failure Mode and Crack Propagationmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Strengthening of RC Beams with CFC Panels for Improving Impact Resistance

Senesavath,

Tamai,

et al. 2023

Applied Sciences

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“…In a study by J.S. Cheng and H.M. Wen [25], employed a dynamic fundamental model for RC to study how impacting velocity affects the behavior and failure of (RC) beams. The investigation also proposed an analytical equation to describe the critical state at which failure modes shift in RC beams subjected to impacting loading.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of reinforced concrete beams subjected to low velocity impact loads using nonlinear finite element analysis

Abdulsahib

Almuhsin

Abduljabbar

2023

PEN

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The development of a nonlinear finite element method (FEM) for examining how reinforced concrete (RC) beams react to dynamic forces under the action of low-velocity impacting loads is presented in this article.The model was employed to analyze the stress distributions along with the time histories of impacting load and beam deflection, which were presented graphically. Comparisons with experimental data from previously conducted studies have been performed to verify the precision of the studied model. The findings demonstrated that the developed model was acceptable. Furthermore, the study performed a detailed parametric analysis, focusing on various factors such as replacing conventional steel bars with FRP bars, increasing concrete compressive strength, changing the impact location, using different diameters of reinforcing bars, and changing the depth of the concrete beam. According to the findings, using FRP bars resulted in 36% less peak load due to the uplift pressure caused by the FRP bars' high strength, while the maximum observed deflection of the beam reinforced with FRP bars decreased by approximately 9%. When the position of the impacting force was applied at one-third of the span of the beam, deflection was decreased by 12% when compared to the RC beam has been impacted at its midspan. In addition, the depth of the beams had a significant impact on the impacting load. These presented findings of the study may contribute to a better understanding of how a structure made of concrete responds to impacting loading.

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