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• W2917386979 abstract "Hybrid FRP-steel is the combination of steel and FRP (fiber reinforce polymer) bars as a rebar. The hybrid FRP-steel reinforcement usually outperforms the regular reinforcement because hybrid FRP-steel reinforcement not only decreases residual strain of the component, but also redistributes the cracks all over the slab component and prevents the slab from wider cracks in a certain area. As a result it usually leads to light structures because of the lower rebar weight. The investigation of steel reinforced concrete (RC) slabs subjected to impact loadings has been reported in the literature. However the study of the hybrid FRP-steel RC slabs is a novel topic. This paper attempts to investigate the application of hybrid FRP-steel rebar in development of impact-resistant RC slab and to minimize the resultant deflection and recover damages of structures subjected to impact. In the present study hybrid FRP-steel RC square slabs with 1800 mm length and 130 mm depth were doubly reinforced in both planar directions such that four layers of longitudinal hybrid FRP-steel reinforcing bars were provided. Models are initially verified according to existing experimental results and are extended for parametric study under impact loading using nonlinear FEA code. The structural responses such as material energy, maximum and residual deflection, load impulse and maximum reaction force were extracted from the analysis. Results show that the hybrid FRP-steel rebar is capable of minimizing the induced damage in concrete and resultant deflection. Furthermore, although over-reinforcing leads to low deflections, it should be avoided in order to enhance the energy absorption of hybrid FRP-steel reinforced slabs. FRP material minimizes the damage level while steel dissipates the imposed energy. Therefore based on the observations, the FRP-steel combination ratio governs both the residual deflection and the dissipated energy which is evaluated as 0.5 for an optimum response." @default.
• W2917386979 created "2019-03-02" @default.
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• W2917386979 date "2019-06-01" @default.
• W2917386979 modified "2023-10-16" @default.
• W2917386979 title "Impact response of hybrid FRP-steel reinforced concrete slabs" @default.
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• W2917386979 doi "https://doi.org/10.1016/j.istruc.2019.02.013" @default.
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