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Optimal reduction from an initial sensor deployment along the deck of a cable-stayed bridge
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  • Journal title : Smart Structures and Systems
  • Volume 17, Issue 3,  2016, pp.523-539
  • Publisher : Techno-Press
  • DOI : 10.12989/sss.2016.17.3.523
 Title & Authors
Optimal reduction from an initial sensor deployment along the deck of a cable-stayed bridge
Casciati, F.; Casciati, S.; Elia, L.; Faravelli, L.;
The ambient vibration measurement is an output-data-only dynamic testing where natural excitations are represented, for instance, by winds and typhoons. The modal identification involving output-only measurements requires the use of specific modal identification techniques. This paper presents the application of a reliable method (the Stochastic Subspace Identification - SSI) implemented in a general purpose software. As a criterion toward the robustness of identified modes, a bio-inspired optimization algorithm, with a highly nonlinear objective function, is introduced in order to find the optimal deployment of a reduced number of sensors across a large civil engineering structure for the validation of its modal identification. The Ting Kau Bridge (TKB), one of the longest cable-stayed bridges situated in Hong Kong, is chosen as a case study. The results show that the proposed method catches eigenvalues and eigenvectors even for a reduced number of sensors, without any significant loss of accuracy.
ambient vibration;cable-stayed bridge;modal frequencies;mode shapes;parameter identification;sensor deployment;
 Cited by
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Smart Structures and Systems, 2016. vol.18. 1, pp.17-29 crossref(new window)
Human induced vibration vs. cable-stay footbridge deterioration, Smart Structures and Systems, 2016, 18, 1, 17  crossref(new windwow)
Damage localization in a cable-stayed bridge via bio-inspired metaheuristic tools, Structural Control and Health Monitoring, 2017, 24, 5, e1922  crossref(new windwow)
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