2. Benchmark solution

We will compare the results obtained with the schema switch to the results obtained when maintaining a single schema in time. In order to quantify the differences between the codes, we will therefore build two reference solutions: the first calculated with Europlexus, the second with Code_Aster explicitly.

2.1. Benchmark results

We compare ourselves to the reference solutions in terms of displacement, acceleration and SRO (for a damping coefficient of 5%) at point \(\mathit{PP2}\) which is in the middle of the upper slab. For SRO, we will also compare the results obtained using the OBSERVATION tables, in particular the one generated by CALC_EUROPLEXUS to the data from ARCHIVAGE.

2.2. Uncertainty about the solution

The differences due to the schema switch will be compared with the differences between the two reference solutions (one obtained with Europlexus, the other with Code_Aster). Ideally, the switch should only slightly amplify these differences between the reference solutions, which cannot be reduced.