Finite Element Analysis and Experimental Validation of Reinforced Concrete Single-Mat Slabs Subjected to Blast Loads

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Title: Finite Element Analysis and Experimental Validation of Reinforced Concrete Single-Mat Slabs Subjected to Blast Loads

Author(s): Gunjan Shetye, Kavya Thadisina, and Ganesh Thiagarajan

Publication: Special Publication

Volume: 306

Issue:

Appears on pages(s): 9.1-9.38

Keywords: Blast Loading, Reinforced Concrete Slab, Experimental Data, Finite Element Simulation, High Strength Materials

Date: 3/1/2016

Abstract:
The aim of this research is to study the blast load response of different types of one way reinforced concrete slabs. The slabs include two material combinations based on their strength namely, the High-Strength Concrete with High-Strength Steel reinforcing bars (HSC-V) and Normal-Strength Concrete with Normal-Strength Steel reinforcing bars (NSC-R) and also two different reinforcement ratios. Experimental data obtained from tests conducted on 12 reinforced concrete slabs in a shock tube (Blast Load Simulator) were used to perform advanced finite element analysis to study the behavior of these slabs subjected to blast loading. Finite element models of these 12 slab panels are developed in LS-DYNA and the blast pressures equivalent to those generated in the experiment are applied on them. The response of material combinations to blast loading is studied using two different concrete models available in LS-DYNA namely, Winfrith Concrete Model (WCM) and Concrete Damage Model Release 3 (CDMR3) with steel being modeled using a plastic kinematic model and the results are compared with experimental data. Compared to NSC-R slabs, the experimental deflection of HSC-V slabs was lower by 9% for slabs with the higher - 0.68% - reinforcement ratio. For the slab with the lower - 0.46% - reinforcement ratio, the experimental deflection was lower by 5% for HSC-V slabs compared to NSC-R slabs, indicating that the usage of high strength materials marginally improved the deflection response of the slabs