Sand-geotextile interface characterisation through monotonic and cyclic direct shear tests

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Castorina Silva Vieira (Autor) FEUP; Maria de Lurdes Lopes (Autor) FEUP; Laura Caldeira (Autor) Outra

Revista

Título: Geosynthetics International

Vol. 20 Nº 1

Páginas: 26-38

ISSN: 1072-6349

Editora: ICE Publishing Ltd.

Indexação

ISI Web of Knowledge - 101 Citações

ISI Web of Science

Scopus - 124 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia civil > Geotecnia

Outras Informações

ID Authenticus: P-002-0QZ

DOI: 10.1680/gein.12.00037

Abstract (EN): For the design and performance analyses of geosynthetic-reinforced soil structures under repeated loading, such as those induced by compaction, traffic and earthquakes, the understanding of cyclic soil-geosynthetic interface behaviour is of great interest. Nevertheless, experimental data concerning this type of behaviour are very scarce. A laboratory study was carried out and is described in this paper. This paper presents the behaviour of an interface between a silica sand and a high-strength geotextile under monotonic and cyclic loading conditions. A large-scale direct shear test device able to perform load-or displacement-controlled cyclic tests was used. The results obtained are presented and discussed, especially in terms of interface shear stiffness and damping ratio. Monotonic direct shear tests indicated that the coefficients of interaction for the sand-geotextile interface depend on the confining pressure. Cyclic direct shear tests indicated that the interface stiffness tends to increase during the first loading cycles, exhibiting slight variation after 10 cycles. Slightly higher values of shear stiffness and damping ratio were reached with displacement-controlled cyclic direct shear tests. The cyclic loading of the interface did not lead to the degradation of the post-cyclic peak shear strength; however, the post-cyclic shear strength for large displacements exhibited an important decrease.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13