A Framework Interpreting Bender Element Tests, Combining Time-Domain and Frequency-Domain Methods

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

António Viana da Fonseca (Autor) FEUP; Cristiana Ferreira (Autor) Outra; Martin Fahey (Autor) Outra

Revista

Título: Geotechnical Testing Journal

Vol. 32 Nº 2

Páginas: 91-107

ISSN: 0149-6115

Editora: American Society for Testing and Materials

Indexação

ISI Web of Knowledge - 120 Citações

ISI Web of Science

Scopus - 138 Citações

INSPEC

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia do ambiente

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia civil > Geotecnia

Outras Informações

ID Authenticus: P-003-MSY

DOI: 10.1520/GTJ100974

Abstract (EN): Bender element (BE) testing is a powerful and increasingly common laboratory technique for determining the shear S-wave velocity of geomaterials. There are several advantages of BE testing, but there is no standard developed for the testing procedures or for the interpretation of the results. This leads to high degree of uncertainty and subjectivity in the interpretation. In this paper, the authors review the most common methods for the interpretation of BE tests, discuss some important technical requirements to minimize errors, and propose a practical framework for BE testing, based oil the comparison of different interpretation techniques in order to obtain the most reliable value for the travel time. This new procedure consist,, of the application of a methodical, systematic, and objective approach for the interpretation of the results, in the time and frequency domains. I he use of an automated tool enables unbiased information to be obtained regarding variations in the results to assist in the decision of the travel time. Two natural soils were tested: residual soil from Porto granite, and Toyoura sand. Specimens were subjected to the same isotropic stress conditions and the results obtained provided insights on the effects of soil type and confining stress on the interpretation of BE results; namely, the differences in testing dry versus saturated soils, and in testing uniform versus well-graded soils.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 17