Forsvarsbygg

Forsvarsbygg (Norwegian Defense Estates Agency) is an agency subordinate to the Norwegian MoD. One of the agency’s responsibilities and services is consulting and R&D within security of buildings and fortifications. The agency was one of the earliest supporters of IMPETUS software development and has played a major role in guiding IMPETUS functionality to face relevant simulation challenges.

 

"IMPETUS software is an easy-to-use and efficient tool for investigating concepts of blast loaded concrete structures"

Knut Rakvåg
PhD, Senior Engineer, Special Advisor, Norwegian Defence Estates Agency

What we did

As a service provider, Forsvarsbygg needs consistent methodologies for modelling structures subjected to extreme loading. One relevant application of IMPETUS software is modelling the response of reinforced concrete structures subjected to blast loads. Together with Forsvarsbygg, IMPETUS developed new functionality for adding rebars to concrete models and this is applied in combination with node splitting to capture concrete cracking.

Blast loading of reinforced concrete plate, rear side - experiment.
Blast loading of reinforced concrete plate, rear side - experiment.
Blast loading of reinforced concrete plate, rear side - simulation.

What we delivered

IMPETUS and Forsvarsbygg developed an easy-to-use interface for modelling of rebars in concrete structure for use with the IMPETUS Afea Solver. Combined with the discrete particle approach for air blasts, this leads to an efficient model set-up. Validation tests of air blast loading on the reinforced concrete panels were also carried out.