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Activities at JRC Ispra on structural diagnostics and reliability aim to assess the degree of deterioration of the integrity of structures and to quantify their residual safety margins during service life, using an "expert systems" approach. The methodology of this approach is explained in detail and two on-going projects are described. The first of these is ARTIC, which carries out the assessment of the residual life of steam headers according to the procedures commonly used by human experts, while assuring a rational framework for knowledge representation and merging. Aspects which are ignored in the conventional approach, such as qualitative knowledge and heuristics, combination of information from different inspection techniques and quantification of the reliability of these, are considered in the expert system. The second project described, RAMINO, is one stage forward with respect to ARTIC, in that it allows integration of existing software packages. The objective is to develop an intelligent system to identify processes that lead to failure, predict the progress of degradation and hence ensure a given level of reliability at the lowest cost. It may be applied to off-shore structures or to nuclear pressure vessels.

Additional information

Authors: LUCIA A C, JRC Ispra (IT)
Bibliographic Reference: Paper presented: International Course "Expert Systems in Structural Safety Assessment", Stuttgart (DE), Oct. 2-4, 1989
Availability: Available from (1) as Paper EN 35080 ORA
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