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Heinisuo Markku, Jenu Markku

Knowledge based design tool of steel structures including economical and structural aspects

Abstract: The paper deals with a knowledge based expert system (KBES) developed for the design of structural steel joints. The KBES can be used for the selection of suitable joints taking into account the expert knowledge stored into the database. The expert knowledge is so far shallow and it contains force transmitting abilities, fabrication and erection cost differences of joints. The KBES is used also for the choosing of suitable values of joint parameters by taking into account both generic rules (appearing in the codes of practice) and specific rules of individual joints and the combinations of both of these rules. The KBES suggests also local analysis models of the joints. The KBES gives an estimation of cost of the whole skeleton by combining the product model (PM) of the material entities and the cost database. The product model for the analysis of the whole steel skeleton is also proposed by the KBES. The PMs are made following IS0 10303, so we are working in an open environment.

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Series: ecce:1997 (browse)
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Shigenori Tanaka, Ichizou Mikami

A kbes combining cbr and rbr to select repalr and retftoflt methods for fatigue damage on steel bridges

Abstract: We have studied the knowledgebased expert system (KBES) to select repairing and retrofitting methods for fatigue damage of steel bridges. The case-based reasoning (CBR) system can solve the problem of howledge acquisition and perform efficient inference based on similar cases, w h e m the rulebased reasoning (RBR) system has the difficulty in acquiring knowledge bases. In the present paper, we constructed a KBES, in whicb CBR and RBR were combined, to select repairing and retrofitting methods for steel bridges‘ fatigue damage. The inference results obtained from this system are discussed to prove its usefulness, and subjects for the future are identified.

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