Studies of blast-proof doors

Justification of the non-missile phenomenon of the door under a blast event

Check by simplified numerical approach, linear numerical approach, and non-linear time-history approach ; and assessment of pressure leaks under blast load

The studies were about the blast-proof doors of a reinforced concrete building. They aimed at justifying the non-missile effect of two doors under a blast event.
They break down as follows :
- Check of the non-missile effect of the blast-proof doors thanks to a simplified numerical approach : modeling by shell elements of the doors on ideal supports, application of the loads on the doors by time steps, calculation of the door response by a linear elastic dynamic analysis, check of the stress, support reactions, and anchors resistance
- Check of the non-missile effect of the blast-proof doors thanks to a detailed numerical approach : modeling by detailed finite elements of the doors and their anchors, doors are modelised by shell elements with a material using a non-linear behavior law, the concrete at the anchors is modelised with volumic elements taking into account the reinforcement bars, all of this with non-linear behavior laws ; application of the pressures by time steps on the doors and non-linear calculations with large deformation, similar post-treatment as previous study step
- Check of the non-missile effect of the blast-proof doors by a non-linear time-history approach : recovery of the previous step numerical modeling and addition of elasto-plastic behavior laws according to shell thicknesses, same post-treatment
- Strengthening proposal of door frame in the anchor zones where there is a risk of failure under blast load.

Mesh of the door
Mesh of the door
Non-linear behavior law of the steel of the blast-proof door
Non-linear behavior law of the steel of the blast-proof door
Von Mises stress in the shells
Von Mises stress in the shells
Displacements of the door
Displacements of the door
Shear stress at the door anchors
Shear stress at the door anchors
Check of the door frame
Check of the door frame