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Computers and Concrete Volume 33, Number 6, June 2024 , pages 725-738 DOI: https://doi.org/10.12989/cac.2024.33.6.725 |
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Finite element modeling of reinforced and prestressed concrete panels under far-field blast loads using a smeared crack approach |
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Andac Lulec, Vahid Sadeghian and Frank J. Vecchio
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| Abstract | ||
| This study presents a macro-modeling procedure for nonlinear finite element analysis of reinforced and prestressed concrete panels under blast loading. The analysis procedure treats cracked concrete as an orthotropic material based on a smeared rotating crack model within the context of total-load secant stiffness-based formulation. A direct time integration method compatible with the analysis formulation is adapted to solve the dynamic equation of motion. Considerations are made to account for strain rate effects. The analysis procedure is verified by modeling 14 blast tests from various sources reported in the literature including a blast simulation contest. The analysis results are compared against those obtained from experiments, simplified single-degree-of-freedom (SDOF) methods, and sophisticated hydrocodes. It is demonstrated that the smeared crack macro-modeling approach is a viable alternative analysis procedure that gives more information about the structural behavior than SDOF methods, but does not require detailed micro-modeling and extensive material characterization typically needed with hydrocodes. | ||
| Key Words | ||
| blast loading; computer modeling; concrete slabs; nonlinear analysis | ||
| Address | ||
| Andac Lulec: LARSA Inc., Melville, NY, USA Vahid Sadeghian: Department of Civil and Environmental Engineering, Carleton University, Ottawa, ON, Canada Frank J. Vecchio: Department of Civil and Mineral Engineering, University of Toronto, Toronto, ON, Canada | ||