Affordable Access

Publisher Website

Reliability updating with equality information

Authors
  • Straub, Daniel
Type
Published Article
Publication Date
Mar 24, 2012
Submission Date
Mar 24, 2012
Identifiers
DOI: 10.1016/j.probengmech.2010.08.003
Source
arXiv
License
Yellow
External links

Abstract

In many instances, information on engineering systems can be obtained through measurements, monitoring or direct observations of system performances and can be used to update the system reliability estimate. In structural reliability analysis, such information is expressed either by inequalities (e.g. for the observation that no defect is present) or by equalities (e.g. for quantitative measurements of system characteristics). When information Z is of the equality type, the a-priori probability of Z is zero and most structural reliability methods (SRM) are not directly applicable to the computation of the updated reliability. Hitherto, the computation of the reliability of engineering systems conditional on equality information was performed through first- and second order approximations. In this paper, it is shown how equality information can be transformed into inequality information, which enables reliability updating by solving a standard structural system reliability problem. This approach enables the use of any SRM, including those based on simulation, for reliability updating with equality information. It is demonstrated on three numerical examples, including an application to fatigue reliability.

Report this publication

Statistics

Seen <100 times