Abstract
The performance of non-composite panels built of steel plates, concrete slabs, and composite sandwich panels in blast response reduction is examined and compared in the present study. The dynamic response of steel stiffened and unstiffened plates, plain concrete, reinforced concrete, and steel fiber reinforced concrete slabs, stiffened and unstiffened steel-foam-steel, and steel-sand-steel sandwich panels is investigated through three-dimensional finite element analyses. Parametric studies are performed considering different stiffener configurations, panel thicknesses, materials in the composite sandwich panels (e.g. polyurethane, dytherm, cenosphere aluminum alloy syntactic foams, and sand), and varying thicknesses of foam and sand layers. Strain rate dependent material properties for steel, concrete, steel fiber reinforced concrete, foams, and sand are used in the analyses. Blast load is modeled using an equivalent pressure time history curve calculated as per the TM5-1300 manual and the modified Friedlander’s equation. The central node displacement of the panels for peak blast overpressure 1.16 MPa applied for 6.1 ms is studied. The results indicate that the non-composite panels made up of steel fiber reinforced concrete slabs and cenosphere aluminum alloy syntactic foam composite sandwich panels show excellent blast response reduction capability as compared to (a) steel plate, (b) plain and reinforced concrete slabs, and (c) polyurethane and dytherm foam cored composite sandwich panels.
Highlights
In the twentieth century, blast has become the most severe manmade hazard that civil and military infrastructure may be subjected to as a result of terror attacks
The validity of the finite element (FE) models has been ensured for steel plates, concrete slabs, and composite sandwich panels under blast loading by comparing the numerical simulation results with the experimental data and analysis results obtained from the literature
Numerical analyses carried out in the present study aims to compare the performance of panels built of stiffened and unstiffened steel plates, plain concrete, reinforced concrete, and steel fiber reinforced concrete slabs and stiffened and unstiffened composite sandwich panels (SPS, steel-dytherm foam-steel (SDS), SAS90, SAS200, and SSS)
Summary
Blast has become the most severe manmade hazard that civil and military infrastructure may be subjected to as a result of terror attacks. Several experimental and numerical studies exist on unstiffened and stiffened steel plates, composite armours, reinforced concrete panels and sandwich structures under blast loading [7,8,9,10,11,12,13,14,15,16,17,18,19]. The objectives of the present study are to examine (i) the deformation and energy response of noncomposite panels built of stiffened and unstiffened plates, slabs, and composite sandwich structures under blast loading, and (ii) to identify the material that shows maximum blast response reduction capability from the selected cases. Threedimensional (3D) finite element (FE) analyses have been performed using the commercial finite element software Abaqus 6.11 [20] to investigate the capability of blast response reduction for different materials. Parametric studies have been carried out using (i) ten different stiffener configurations for steel and sandwich panels, (ii) three different thicknesses (tp) of the PC, RC, and SFRC slabs, and (iii) three different core thicknesses (tc) of the sandwich panels under blast loading
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