ABSTRACT
Hence, the probability to move from quotation i to j, is the total surface of bridges that were scored i at year p and j at year p+1 divided by the total surface of bridges that were in i at year p, for p between 1996 and 2004. The obtained pure ageing transition matrices are shown in equation (4) for different types of structures such as reinforced concrete bridges (matrix P1) and prestressed concrete box girder (matrix P2). It should be pointed out that values under the diagonal line are summed up to the diagonal term to obtain pure ageing matrices P1 and P2 without any maintenance action.
