One such example is the prediction of a reinforced concrete building response due to blast loading from a terrorist attack. The direct modeling of three-dimensional dynamic analysis of complete buildings requires very large models containing as many as several million elements. For a coupled analysis, the airblast load is modeled by an Eulerian finite volume code and the structure is modeled using a Lagrangian finite-element code. The feasibility of large-scale computations, both uncoupled and coupled, was demonstrated at using structural models as large as 3.2 million elements and as many as 512 processors. Numerous benchmark problems were performed to validate the material models that characterize the concrete and reinforcing bar behavior.
Uncoupled analyses show excellent agreement with observed behavior in the tests.
Efficient coupling between the Eulerain and Lagrangian model requires multiple parallel decompositions with irregular communication patterns. The computational strategy for parallel implementation of the coupled codes will be outlined.