Model updating of Pescara Benchmark: interval vs. traditional method

In this work FE model updating is used to detect parameter variations from representative models of the Pescara benchmark beams. For a considered series of the beams experimental modal data are available at a certain beam stage. For this stage model updating results are obtained and different updating techniques are compared. Standard techniques based on parameters sensitivity calculation are applied and, in this case, commercial robust software and self-implemented are used. A new interval model updating approach is also applied to possibly cope with experimental uncertainties and parameters variability. The interval algorithm automatically gives a bound of the results; on the contrary sensitivity approach gives a crisp result. Hence, to have a proper comparison, a mid term comparison is also given from the calculated interval solution.