Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
COMPUTATIONAL MODEL UPDATING OF SIMPLE BEAMS USING EXPERIMENTAL MODAL DATA
Submission Author:
Matheus Galdino da Silva , PR
Co-Authors:
Matheus Galdino da Silva, Leonardo Lobo, Elvidio Gavassoni, Amanda Jarek, RODRIGO GOMES, Marcpos Neri, JOSÉ HUMBERTO DINIZ
Presenter: Matheus Galdino da Silva
doi://10.26678/ABCM.COBEM2019.COB2019-1163
Abstract
Structural Health Monitoring (SHM) is a manner to constantly evaluate a structure’s state during its lifespan. Non-destructive tests are recommended in those cases once destructive ones do not allow it to be repeated many times. Obtaining and evaluating modal parameters (as natural frequencies and mode shapes) from a given structure consist as a good tool to perform a SHM, since those modal results are an inherent characteristic of the system. Brazilian companies in the electricity distribution field are showing interest in the use of SHM based on modal parameters control to evaluate the structural integrity of overhead reinforced concrete distribution poles. The main goal is to contribute to safe operational actions and also to protect third-party agents affected by those structures. This paper is part of a program that seeks to develop a methodology of SHM of reinforced concrete light poles using modal analysis. Experimental reinforced concrete beams, subject to different kinds and levels of induced deterioration, were constructed and experimentally tested in order to update finite element method mathematical models (built at Ansys Workbench software). The model was verified and validated. Until this moment, from these experimental tests and updating processes, it was possible to notice that different kinds of chemical deterioration (such as chlorite or sulfate) do not represent a tendency variation over time, however, it was noticed that one of them (chloride) reduces the Young’s Modulus while the other (sulfate) increases the same parameter.
Keywords
Strucutural Health Monitoring, modal analysis, reinforced concrete, finite element, Vibration
