Numerical simulations are common for the design process of structures and the assessment of
existing buildings. In the design process several physical phenomena are represented by
partial models. These models are coupled together to predict the behavior of the observed
structure. Engineers have to decide which phenomena should be considered in the structural
model. This process is often made by engineering judgement. In most cases such models includes
some amount of inaccuracy and incompleteness. Therefore the integrative assessment method is
established here to quantitatively evaluate the entire structural load-bearing behavior which
can significantly reduce the uncertainty in model predictions. The probability of occurrence of
structural damages during lifetime can be clearly reduced.
