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Abstract
The potential merits of the application of expert systems to prestressed concrete bridge design are discussed. After identifying the areas in the design process to which expert systems can best be applied, attention is focused on the building up of a knowledge base in the domain of conceptual bridge design. The problems involved in the elicitation, validation and representation of the required knowledge are described. A design model is proposed for the selection of different bridge types. Implementation of the model to manipulate design knowledge is illustrated.