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Prediction of perforation into concrete accounting for saturation ratio influence at high confinement
پیش بینی سوراخ شدن در بتن برای تأثیر نسبت اشباع در محصور شدن بالا-2021 This paper provides both an analytical and a finite element models aiming at better predicting possible perfo-
ration of reinforced concrete slabs submitted to impacts. Both models account for free water saturation ratio and
high triaxial stress induced into concrete by the impact. Finite element simulations are performed with Abaqus
explicit code using a revised constitutive model for concrete; this coupled damage plasticity model (PRM) ac-
counts for strain rate effects and the influence of saturation ratio on the triaxial behavior. Complementary
original analytical predictions of ballistic limit and residual velocities are provided for both hard and soft im-
pacts. These predictions depend on a recent deviatoric stress-based formulation of compressive strength of
concrete. Numerical and analytical results are consistent with bending and punching experimental tests. keywords: اثرات نرم و سخت | سرعت باقی مانده | بتن آرمه | ظرفیت سوراخ کردن | نسبت اشباع | Soft and hard impacts | Residual velocity | Reinforced concrete | Perforation capacity | Saturation ratio |
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