Compression and shear wave propagation in cemented-sand specimens

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

M. F. Amaral (Autor) Outra; A. Viana da Fonseca (Autor) FEUP; M. Arroyo (Autor) Outra; G. Cascante (Autor) Outra; Jorge Manuel C. Machado de Carvalho (Autor) FEUP

Revista

Título: Geotechnique Letters

Vol. 1

Páginas: 79-84

ISSN: 2049-825X

Editora: ICE Publishing

Indexação

ISI Web of Knowledge - 13 Citações

ISI Web of Science

Scopus - 15 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia do ambiente

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia civil > Geotecnia

Outras Informações

ID Authenticus: P-005-X5B

DOI: 10.1680/geolett.11.00032

Abstract (EN): Ultrasonic and bender element tests in the laboratory are typically used to measure elastic modulus and damping ratio. However, interpretation of the results is challenging for a variety of reasons, including the influence of experimental details, geometrical effects and the analytical techniques used for data processing. It is therefore convenient to cross-check results by performing several independent measurements. Three different types of measurements were performed on cemented-sand specimens. Longitudinal waves or constrained compressional waves in a cylindrical specimen were generated in a high-frequency range (20-70 kHz) using a newly designed transducer interface. Full dynamic characterisation was made possible by independent measurement of the transducer response. Pure unconstrained compressional waves or simply compression waves were measured in the same specimens with high-frequency transducers. The shear modulus was computed and used to predict the arrival of shear waves on independent bender element measurements. The predicted arrival was close to first-break estimates, and bender measurements were therefore confidently employed to track cement curing effects on a different set of specimens. The specimen frequency response function obtained from the longitudinal wave measurements was examined in detail and damping ratios were estimated for the compression vibration modes in a rod.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Notas: http://www.icevirtuallibrary.com/content/article/10.1680/geolett.11.00032

Nº de páginas: 6