Compatible Deformation in the Condition Assessment of Beam Structures
| Autor: | Dong Xu, Lei Jun, José Turmo Coderque |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. EC - Enginyeria de la Construcció |
| Rok vydání: | 2018 |
| Předmět: |
Deformations (Mechanics)--Measurement
Observational error Materials science observability method Enginyeria civil::Materials i estructures [Àrees temàtiques de la UPC] structural system identification Mechanics Deformation (meteorology) Condition assessment Deformacions (Mecànica) -- Mesurament compatibility conditions optimization measurement errors Beam (structure) |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| ISSN: | 2221-3783 |
| DOI: | 10.2749/nantes.2018.s24-79 |
| Popis: | The structural deformations should satisfy some geometric relations. However, this might not hold when the measured deformations are contaminated by measurement errors. In order to filter out the incompatibility in the measured deformation due to errors, the mathematical relation among the displacements within the structure are derived by the structural system identification by observability method. Namely, checking the observability of the parameters and obtaining the symbolical solution of those observable variables in the observability equations. Rearranging the associated solution leads to the geometrical equations that some displacements should satisfy, which is referred as the compatibility conditions. Among all compatible deformations satisfying these conditions, the one closest to the measured deformation is found by an optimization procedure. Finally, the structural parameters are estimated based on the optimal deformation shape. This method can smooth away the incompatibility due to errors and is validated by a simply supported beam and a two-span continuous beam. |
| Databáze: | OpenAIRE |
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