Journal
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
Volume 289, Issue -, Pages 1-23Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2015.01.012
Keywords
Sensitivity analysis; Non-linear structural systems; Reliability; Simulation methods; First excursion probability; Post-processing
Funding
- CONICYT [1110061]
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This work explores the feasibility of using advanced simulation-based methods for reliability sensitivity analysis of nonlinear structural systems subject to stochastic excitation. Reliability is defined in terms of a first excursion probability which measures the chances that uncertain structural responses exceed in magnitude prescribed threshold levels within a specified time interval. The proposed reliability sensitivity analysis consists of applying a simple post-processing step associated with an advanced sampling-based reliability analysis. It does not require any additional system response evaluations. In addition, the method provides information about the whole trend of the reliability sensitivity estimates in terms of the threshold levels. The approach is validated on two nonlinear structural models under stochastic ground excitation. (C) 2015 Elsevier B.V. All rights reserved.
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