NEHRP Clearinghouse
- Title
- Adaptive Dynamic Analysis Considering Structural Lifespan: An Approach Based on Fuzzy Mathematics.
- File
- PB95192076.pdf
- Author(s)
- Wadia-Fascetti, S.; Smith, H. A.
- Source
- National Science Foundation, Arlington, VA.; Shimizu Corp., Tokyo (Japan). Ohsaki Research Inst., August 1994, 171 p.
- Abstract
- In this research a new analysis procedure is proposed which integrates system identification objectives and fuzzy set mathematics to formulate an adaptive analysis model capable of considering the changes a structure experiences during its lifespan. The adaptive model quantify the uncertainties associated with dynamic parameters at three stages during the structure's lifespan; calibration, degradation, and damage. The adaptive model proposed here, unlike conventional system identification techniques, does not require experimental response data from the as-built structure. Instead, fuzzy set mathematics is used to represent the level of confidence of various design assummptions, and the vertex method is used to develop a fuzzy set which bounds the structure's dynamic parameters.
- Keywords
- Fuzzy sets; Degradation; Structural engineering; Structural vibration; Structural failure; Earthquake damage; Dynamic response; Earthquake engineering; Uncertainty; Stiffness; Calibration; Structural response; Adaptive dynamic analysis; Errors; Structural analysis