NEHRP Clearinghouse
- Title
- Two Papers on Applications of Fuzzy Sets.
- File
- PB85224665.pdf
- Author(s)
- Shiraishi, N.; Furuta, H.; Hashimoto, M.; Shinozuka, M.; Yao, J. T. P.
- Source
- National Science Foundation, Washington, DC., January 1985, 51 p.
- Identifying Number(s)
- CE-STR-85-12
- Abstract
- The text presents two papers on fuzzy sets theory. First, fuzzy sets theory is used to introduce qualitative information in the damage assessment of structures. Through fuzzy quantification theory, the weighting of each damage factor is given through the data obtained from past observations; the rank of damages in underlying structures is determined through a multi-criteria analysis. The concept of semi-ordering is explored as a way of giving more meaningful classification with which an economical program of repair and/or maintenance can be established. Fuzzy quantification analysis is used to diagnose earthquake-produced damage in bridges; analysis reveals that use of the theory enables the ambiguities involved in categorizing items and determining external criteria to be accounted for. Second, several available definitions of redundancy are reviewed and examined. To account for the often unclear definition of structural redundancies, probabilistic and fuzzy interpretations of several alternative measures are given and discussed.
- Keywords
- Structures; Fuzzy sets; Damage assessment; Bridges (Structures); Equations; Earthquake resistant structures; Damage; Earthquake engineering; Redundancy; Earthquakes; Dynamic structural analysis