NEHRP Clearinghouse
- Title
- Rule-Based Damage Assessment System for Existing Structures.
- File
- PB82229311.pdf
- Author(s)
- Ishizuka, M.; Fu, K. S.; Yao, J. T. P.
- Source
- National Science Foundation, Washington, DC., March 1982, 28 p.
- Identifying Number(s)
- CE-STR-82-14
- Abstract
- The state-of-the-art of damage assessment is reviewed and SPERIL version I, a rule-based damage assessment system of existing structures, particularly those subjected to earthquake excitation, is described. The problem of damage assessment is considered in terms of the theory of pattern recognition and an expert system approach is used to develop the computer-based system. In SPERIL version I, separate evidential observations are integrated on the basis of the extended Dempster and Shafer theory for fuzzy subsets. Useful information for the damage assessment comes mainly from two sources: (1) the visual inspection at various portions of the structure; and (2) the analysis of accelerometer records during the earthquake. The interpretation of these data is influenced by the particular kind of structure under study--its design, height, and construction materials. Thus, useful information is collected and expressed in a stylized rule format in the knowledge base. The current rules are expected to be updated by more specific ones for better performance.
- Keywords
- Structures; Fuzzy sets; Damage assessment; Probability theory; SPERIL1 computer program; Computer applications; Pattern recognition; Earthquake engineering; Earthquakes