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8th European Workshop On Structural Health Monitoring (EWSHM 2016)
5-8 July 2016, Spain, Bilbao
Right Now in Bilbao 07:27 Fri 13
Concrete14:20 Tuesday 5. Jul - A4
The use of electromechanical impedance based structural health monitoring technique in concrete structures
Abstract »In the last years, in order to increase the reliability and safety of complex civil and mechanical structures, methods of structural health monitoring (SHM) have been developed to verify the integrity of these systems. One the methods that has attracted the attention of a number of scientists and engineers is the method based on the electromechanical impedance of the system. For this aim, both the direct and inverse properties of piezoelectric transducers (such as the PZT) that are installed along the structure are used. However, there is a need for refining the technique with respect to its application in concrete structures. It is known that concrete reinforced with steel fibers may suffer micro cracking during manufacturing due to a combination of hydration residual stresses, creep, contraction, and temperature variation as the structure is submitted to mechanical stress. In the present contribution an experimental procedure was performed to evaluate the impedance based SHM technique to detect damage in a concrete structure. For this aim, a prismatic sample of concrete reinforced with steel fibers - SFRC, with a compressive strength of the concrete with 40Mpa was tested. The steel fibers proportion corresponds to 60kg / m³ (0.77% in volume) including a proportion of cement, sand, gravel, water and additive. This sample was subjected to toughness flexural testing for prismatic beams to produce a damage. Measurements of the electromechanical impedance of the specimen were collected before and after performing the damage by using the impedance analyzer Agilent 4294A. Therefore, this paper is devoted to damage identification and characterization of concrete structures by using an impedance based SHM approach.
Paper
Authors
Silva, Raquel Naiara FernandesSilva, Raquel Naiara Fernandesraquel.fernandes@feciv.ufu.br
Biography:
The author is a Professor at Federal University of Ubelândia/UFU.
Affiliation:
FEDERAL UNIVERSITY OF UBERLÂNDIA (UFU)
School of Civil Engineering
38408-100 UBERLÂNDIA
Brazil
55-34-992632794Tsuruta, Karina Mayumi*Tsuruta, Karina Mayumi*
karinamayumi@yahoo.com.br
55-34-99991-7100
Biography:
The author is a Post-doctoral researcher in School of Mechanical Engineering at Federal University of Uberlândia/Brasil.
Affiliation:
FEDERAL UNIVERSITY OF UBERLÂNDIA (UFU)
School of Mechanical Engineering
38408-100 UBERLÂNDIA
Brazil
55-34-99991-7100Rabelo, Diogo de SouzaRabelo, Diogo de Souza
diogo@mec.ufu.br
Affiliation:
FEDERAL UNIVERSITY OF UBERLÂNDIA (UFU)
38408-100 UBERLÂNDIA
Brazil
55-34-3239-4017Finzi Neto, Roberto MendesFinzi Neto, Roberto Mendes
finzi@ufu.br
+5534999190790
http://lattes.cnpq.br/3792275882221002Affiliation:
FEDERAL UNIVERSITY OF UBERLÂNDIA (UFU)
School of Mechanical Engineering
38408-100 UBERLÂNDIA
Brazil
55-34-3239-4017
lattes.cnpq.br/3792275882221002Steffen Jr., ValderSteffen Jr., Valdervsteffen@ufu.br
55-34-3239-4030
Biography:
Valder Steffen, Jr is Mechanical Engineer (UNICAMP, Brazil, 1976) and PhD in Mechanical Engineering (University of Franche-Comté, France, 1979). He did his Habilitation at the University of Franche-Comté in 1991. He worked as a visiting scientist at the INSA de Lyon – France, in 1986-87 and was a Fulbright Scholar at Virginia Tech – USA, in 1999-2000. He is now Professor at the School of Mechanical Engineering, Federal University of Uberlândia, in Brazil. His research interest is focused on dynamics of mechanical systems, optimization and inverse problems, rotordynamics, and smart structures.
www.mecanica.ufu.brAffiliation:
FEDERAL UNIVERSITY OF UBERLÂNDIA (UFU)
School of Mechanical Engineering
38408-100 UBERLÂNDIA
Brazil
55-34-3239-4030
55-34-32394206
www.ufu.br*Contact
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