Journal
ENGINEERING STRUCTURES
Volume 120, Issue -, Pages 166-182Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2016.04.028
Keywords
Cable-stayed bridge; Deceptive problem; Global optimisation algorithms; Inverse problem; Model updating; Multiple minima; Genetic algorithm; Sequential niche technique; Structural optimisation
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Funding
- Lloyd's Register Foundation
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Structural model updating is an optimisation problem where parameters that minimise the errors between the model and the actual structure are sought. However, multiple solutions may be present. Global optimisation algorithms are efficient optimisation tools but are not fully immune to missing the global minimum. To increase the chance of finding the global minimum, a combination of genetic algorithm with sequential niche technique is proposed. The method performs systematic search to find multiple minima and facilitates detecting the minimum that best describes the system. The technique is applied to experimental data from a simple laboratory structure and a full-scale pedestrian cable-stayed bridge, and also tested on a deceptive problem using the numerical model of a space frame. (C) 2016 Elsevier Ltd. All rights reserved.
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