Sensitivity Analysis of Fuzzy Structural Reliability Using Adaptive Stability Transformation Method

مهندسی عمران فردوسی

Article 7, Volume 32, Issue 1 - Serial Number 25, April 2019, Pages 119-136   

Document Type: پژوهشی

DOI: 10.22067/civil.v32i1.63984

Authors

Behrooz Keshtegar^{* 1}; Mansuor Bagheri²

¹University of Zabol

²Birjand University of Technology

Abstract

In this paper epistemic uncertainty of random variables in the reliability analysis of Adjusted Stability Transformation Method has been modeled and fuzzy structural reliability index has been determined using GA. In the reliability analysis process, a dynamic adaptive approach based on stability transformation method has been applied which the control coefficient is self-adapted at each iteration. Moreover in order to investigate the importance of epistemic uncertainty in the fuzzy structural reliability index, sensitivity analysis using Entropy-Shannon has been done. Survey results of three structural examples indicate that the proposed reliability method provides stable results with suitable computational efficiency. The sensitivity of failure probability to epistemic uncertainty has shown a considerable effect on the structural reliability in some problems.    

Keywords

fuzzy reliability analysis; Entropy-Shannon sensitivity analysis; adaptive stability transformation method

Supplementary Files

7-keshtegar - Revised.pdf

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