Showing papers by "Timothy J. Ross published in 1988"
01 Apr 1988
TL;DR: In this paper, the authors used expert system techniques in the damage assessment of buried protective structures using a series of tests conducted on 1/4-scale reinforced concrete boxes, which were subjected to simulated high explosive blast loads and thus sustained large amounts of damage.
Abstract: : This research effort uses expert system techniques in the damage assessment of buried protective structures. An expert system was chosen because much of the information involves linguistic interpretation of vague or uncertain terminology and ideas. The development of this damage assessment code is based on a series of tests conducted on 1/4-scale reinforced concrete boxes. The box elements in these tests were subjected to simulated high explosive blast loads and thus sustained large amounts of damage. The subjective information was derived from a questionnaire sent to experts around the country concerning the levels of damage and modes of response in the experimental tests. Because the knowledge obtained from the experts contained ambiguous and uncertain terminology, the theory of fuzzy sets was implemented to combine the information. Objective information was derived from instrumentation waveforms and included such quantities as interface pressures and roof slab deflections. This numerical information is used to describe response modes and damage levels of the structure. Overall control within the damage assessment code (known as DAPS) comes from a commercially available expert system shell. Within this shell both the subjective and objective knowledge may be represented in the form of action-premise (IF-THEN) type rules. External to the shell, programs have been written in BASIC and FORTRAN which perform specific functions on the subjective and objective data. Using the shell and external programs, knowledge is combined into an overall damage assessment of the buried structure via a rule-based format.
1 citations