Statistical aspects concerning the degradartion condition of bridges

Abstract

Starting from data acquired in inspections for assessment of technical condition, an analysis must always be conducted over the global situation encountered. Such operations must be considered in systematic procedures to obtain information that might lead us to calibration or, where necessary, to modification of the assessment
system currently in use.
In the SETEOA program, a joint Romanian-French project that took place between 2001 and 2003, around 1200 bridges were included. Data and information acquired are further used to assessing the technical condition and works necessities for maintaining the bridges on the national roads network. They are also a start for developing the database of the bridge management system at National Administration of Roads (NAR). Under the statistical, the degradations observed were considered aspect through the two assessment systems used:
AND522-2002 and GETEC coding.
Because the results processing is still in progress only 776 were included in the present analysis. As other information will be available the report will be updated.
No significant differences are expected because we consider that the present sample include here is a representative sample for national level.
The distribution of bridge with respect to the main construction material is presented. As a confirmation of the sample being representative we may observe that the percentage of the bridges in reinforced concrete and pre-stressed concrete together represents 94.98%, which corresponds to the national percentage of 94.15% (52.82% reinforced concrete and 41.33 pre-stressed concrete) [1].
Predominance of these types of materials imposes some consequences: first the total length of the bridges is relatively low and second a pathology specific to these types of elements