Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/21587

TitleContinuous monitoring of concrete E-modulus since casting based on modal identification : a case study for in-situ application
Author(s)Azenha, Miguel
Ramos, Luís F.
Aguilar, Rafael
Granja, José Luís Duarte
KeywordsE-modulus
Concrete
Modal identification
Measurement
Ultra-sound velocity
NDT
In situ
Issue date2012
PublisherElsevier
JournalCement and Concrete Composites
Abstract(s)An in situ application of a recently developed technique for continuous measurement of concrete E-modulus since casting is addressed in this paper. Such technique is based on the continuous modal identification of a composite beam that contains the material under test. As concrete hardens, the flexural resonant frequency of the beam increases and the computation of E-modulus can be made with recourse to the beam’s equation of motion. Even though recent publications have shown the feasibility of this technique in laboratory environment, no actual in situ application has been tested so far. That is one of the topics of this paper, which also proposes improvements to the originally devised method and compares results with ultra-sound wave velocity measurements. The scope of the work is extended with the modal analysis of a prefabricated beam made of the same concrete under test, allowing insights to be made regarding the E-modulus of concrete.
Typearticle
URIhttp://hdl.handle.net/1822/21587
DOI10.1016/j.cemconcomp.2012.04.004
ISSN0958-9465
Publisher versionhttp://www.sciencedirect.com
Peer-Reviewedyes
AccessrestrictedAccess
Appears in Collections:ISISE - Artigos em Revistas Internacionais

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