Mesh Size Influence of the Concrete Slab FE Model Exposed to Impact Load for Various Material Models

Mesh Size Influence of the Concrete Slab FE Model Exposed to Impact Load for Various Material Models

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Numerical approach using the FEM has been used to model the behaviour of the reinforced concrete specimen subjected to the pressure blast wave. The concrete structure is a slab freely supported around the perimeter by a steel plate and a concrete base. A simplified 3D blast model has been used, which involves the pure Lagrangian approach of FEM. The analyses have been conducted using explicit solver. 3 different non-linear material models of concrete have been used to capture the concrete behaviour: CSCM (Continuous surface cap model), Schwer Murray continuous surface cap model, and JHC (Johnson-Holmquist-Cook) material model. Influences of various mesh sizes on the final results (crack patterns, vertical deflection, strain-time dependence) are being monitored, compared with physical experiment data and discussed.

Numerical approach using the FEM has been used to model the behaviour of the reinforced concrete specimen subjected to the pressure blast wave. The concrete structure is a slab freely supported around the perimeter by a steel plate and a concrete base. A simplified 3D blast model has been used, which involves the pure Lagrangian approach of FEM. The analyses have been conducted using explicit solver. 3 different non-linear material models of concrete have been used to capture the concrete behaviour: CSCM (Continuous surface cap model), Schwer Murray continuous surface cap model, and JHC (Johnson-Holmquist-Cook) material model. Influences of various mesh sizes on the final results (crack patterns, vertical deflection, strain-time dependence) are being monitored, compared with physical experiment data and discussed.

Blast load, continuous surface cap material model, Schwer Murray cap model, Johnson-Holmquist-Cook model, discretization, explicit analysis, numerical nonlinear analysis, reinforced concrete slab.

Blast load, continuous surface cap material model, Schwer Murray cap model, Johnson-Holmquist-Cook model, discretization, explicit analysis, numerical nonlinear analysis, reinforced concrete slab.

JINDRA, D.; HRADIL, P.; KALA, J.; KRÁL, P.

2021

01.12.2020

Ćeská republika, Ostrava

1804-4824

Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series

20

2

Česká republika

1

7

7

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