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논문 기본 정보

자료유형
학술저널
저자정보
Ramos, Catarina (CONSTRUCT-GEO, Faculty of Engineering [FEUP], University of Porto) Fonseca, Antonio Viana da (CONSTRUCT-GEO, Faculty of Engineering [FEUP], University of Porto) Vaunat, Jean (Departamento de Ingenieria del Terreno, Universitat Politecnica de Catalunya)
저널정보
테크노프레스 Geomechanics & engineering Geomechanics & engineering 제9권 제6호
발행연도
2015.1
수록면
729 - 742 (14page)

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The aim of the present work was the study of instability in a loose sand from Les Dunes beach in Ain Beninan, Algeria, where the Boumerdes earthquake occurred in 2003. This earthquake caused significant structural damages and claimed the lives of many people. Damages caused to infrastructures were strongly related to phenomena of liquefaction. The study was based on the results of two drained and six undrained triaxial tests over a local sand collected in a region where liquefaction occurred. All the tests hereby analyzed followed compression stress-paths in monotonic conditions and the specimens were isotropically consolidated, since the objective was to study the instability due to static loading as part of a more general project, which also included cyclic studies. The instability was modeled with the second-order work increment criterion. The definition of the instability line for Les Dunes sand and its relation with yield surfaces allowed the identification of the region of potential instability and helped in the evaluation of the susceptibility of soils to liquefy under undrained conditions and its modeling. The dilatancy rate was studied in the points where instability began. Some mixed tests were also simulated, starting with drained conditions and then changing to undrained conditions at different time steps.

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