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Critical Analysis of Strucutres by Qualitative Reasoning
Author(s) -
Kawamura H.,
Tani A.,
Naknao H.,
Yamada M.
Publication year - 1992
Publication title -
computer‐aided civil and infrastructure engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.773
H-Index - 82
eISSN - 1467-8667
pISSN - 1093-9687
DOI - 10.1111/j.1467-8667.1992.tb00424.x
Subject(s) - qualitative reasoning , truss , uniqueness , computer science , qualitative analysis , artificial intelligence , mathematics , qualitative research , structural engineering , mathematical analysis , engineering , social science , sociology
In the critical analysis of fracture and unstable behavior of structures, the uniqueness of solution is no longer assured. Such critical states can be analyzed by recognizing their deformation‐ and forcespaces which are not considered in the usual numerical matrix analysis. The purpose of this paper is to show the applicability of qualitative reasoning, which has been recently developed as a method of artificial intelligence, to the above‐mentioned critical analysis of structures. To recognize multi‐dimensional spaces, qualitative reasoning is performed using reasoning rules described with production rules ‘if ∼ then ∼’ and qualitative values +, 0 and −. As a case study, qualitative reasoning is applied to some kind of truss units subjected to combined axial force, bending moment and shear force. Its mechanical behavior can be illustrated in the three‐dimensional deformation‐ and force‐spaces. Here, the LISP language, which is suitable for processing lists, is employed.