Author(s)

Beatriz de Souza, Leite P. de Lima and Nelson F. Favilla Ebecken

Abstract

- Uncertainty in structural engineering analysis exists in the architecture of a structural system, its basic parameters, the information resulting from the abstracted aspects of the system, and the non abstracted or unknown aspects of the system. Also, uncertainty is present as a result of prediction models, analysis and design of structures, and general lack of knowledge in the behavior of real structures. INTRODUCTION The uncertainty of a system parameter may be attributed to cognitive and non- cognitive sources. The cognitive sources include uncertainty due to imprecise and vague information and are submitted to subjective judgment, the probability and statistics axioms are limited to treat this type of uncertainty, so the theory of Fuzzy Sets may be applied. The non-cognitive sources include the system parameters

Keywords