Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/98421
Author(s): Miguel Azenha
Filipe Magalhães
Rui Faria
Álvaro Cunha
Title: Measurement of concrete E-modulus evolution since casting: A novel method based on ambient vibration
Issue Date: 2010
Abstract: The use of ambient vibration tests to characterize the evolution of E-modulus of concrete right after casting is investigated in this paper. A new methodology is proposed, which starts by casting a concrete cylindrical beam inside a hollow acrylic formwork. This beam is then placed horizontally, simply supported at both extremities, and vertical accelerations resulting from ambient vibration are measured at mid-span. Processing these mid-span acceleration time series using power spectral density functions allows a continuous identification of the first flexural frequency of vibration of the composite beam, which in turn is correlated with the evolutive E-modulus of concrete since casting. Together with experiments conducted with the proposed methodology, a complementary validation campaign for concrete E-modulus determination was undertaken by static loading tests performed on the composite beam, as well as by standard compressive tests of concrete cylinders of the same batch loaded at different ages.
Subject: Engenharia estrutural, Engenharia civil
Structural engineering, Civil engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia civil
Engineering and technology::Civil engineering
URI: https://repositorio-aberto.up.pt/handle/10216/98421
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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