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Numerical Study of Concrete Beams With and Without Stirrups Under Impact Loading


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DOI: https://doi.org/10.15866/irece.v14i2.22223

Abstract


This paper presents the theoretical behaviors of concrete beams with and without stirrups under drop weight testing. The main objective of this work is to investigate numerically the influence of different types of longitudinal steel reinforcement (steel bars and FRP bars) on the impact behavior of concrete beams in terms of peak load, and deflection. In addition, the effect of drop height, the presence of stirrups, the concrete compressive strength of the concrete beams, and strengthening concrete beams by FRP strips have been involved in investigating their contribution to the behavior of the impact response. The analytical work has been carried out using ABAQUS/CAE 2019. Firstly, the model has been validated against four beams tested experimentally with various impact heights. Then, four groups of beams with different parameters have been simulated and tested under the same impact loading conditions. The first group has consisted of four beams with normal concrete strength reinforced by FRP bars. The second group has been strengthened externally by CFRP strips. The third and the fourth groups are with stirrups and higher grade of concrete, respectively. It has been found out that the current simulation could be an effective tool for predicting the dynamic performance of beams with and without stirrups subjected to impact loading. Furthermore, the improvements done to the available experimental specimens have led to increase the peak impact load and decrease the ultimate deflection.
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Keywords


RC Beam; FRP Bars; CFRP Strips; Impact Response; ABAQUS

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References


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