43 research outputs found
Efecto de la presión de confinamiento y el método de deposición sobre la respuesta de corte no drenada de arena de densidad media
This study examines the effects of the confining pressure and sample preparation method on the shearing behavior shown by sand from the Chlef River (Algeria). Undrained monotonic triaxial compression tests were performed on samples with an initial relative density of 50% at initial confining pressures of 50 to 200 kPa. Samples were prepared using two depositional methods: dry funnel pluviation and wet deposition. Our results reveal marked differences in the undrained shearing responses produced under identical conditions of density and stress and therefore determined by the soil fabric. Thus, at low confining pressures, samples prepared by the wet deposition method showed complete static liquefaction (zero effective confining pressure and zero stress difference). For both sample types, as confining pressures increased, effective stress paths exhibited increasing resistance to liquefaction indicated by increasing dilatant tendencies.En este trabajo se han estudiado los efectos de la presión de confinamiento y los métodos de preparación de muestras sobre el comportamiento de rotura de arena Chlef. Los resultados de las pruebas sin escurrir monótona de compresión triaxial realizadas en muestras con una densidad relativa inicial del 50% y presiones de confinamiento inicial variaron desde 50 hasta 200 kPa. Las muestras fueron preparadas por dos métodos de deposición seca con embudo de pluviacion y deposición húmeda. Se encontró que existía una marcada diferencia en el comportamiento sin escurrir a pesar de que las condiciones de la densidad y el estrés eran idénticas. La conclusión fue que la estructura del suelo fue la responsable de este resultado. Los resultados también indicaron que a baja presión de confinamiento, las muestras preparadas mediante un método de deposición húmedo, completan la licuefacción estática (ninguna presión de confinamiento efectiva y ninguna diferencia de estress). Los resultados indicaron también que a bajas presiones de confinamiento, los especímenes reconstituida por el método de deposición húmeda expuesto licuefacción estática completa (cero de la presión efectiva de confinamiento y cero diferencia de estrés). Como las presiones de confinamiento se incrementaron, las trayectorias de tensiones efectivas aumentaron la resistencia a la licuefacción, mostrando aumento de la tendencia dilatante
Influence of inter-granular void ratio on monotonic and cyclic undrained shear response of sandy soils
Reply to the comment by M. Rahman on “Influence of inter-granular void ratio on monotonic and cyclic undrained shear response of sandy soils” by M. Belkhatir et al. [C. R. Mecanique 338 (2010) 290–303]
Enveloping Sophisticated Tools into Process-Centered Environments
We present a tool integration strategy based on enveloping pre-existing tools without source code modifications or recompilation, and without assuming an extension language, application programming interface, or any other special capabilities on the part of the tool. This Black Box enveloping (or wrapping) idea has existed for a long time, but was previously restricted to relatively simple tools. We describe the design and implementation of, and experimentation with, a new Black Box enveloping facility intended for sophisticated tools --- with particular concern for the emerging class of groupware applications
Supporting Software Maintenance Processes in TEMPO
We will show in this article how Tempo, a process-centered software engineering environment (SEE), assists in cooperative work by means of an approach based on a communication model. We will describe the executable formalisme used to define software engineering activities, and we will show how contraints related to the use of objects in these activities are expressed using the role concept. We will then present our communication model. Thanks to this model, strategies governing the cooperation between various software processes are specified by the concept of active, programmable connections. A connection is a communication channel that links two roles. Message exchange is controlled using TECA rules (Temporal event-condition-action rules), executed by a trigger mechanism. These allow for programming of synchronization strategies between processes, propagating the effects of an executed action on one or more connection points. The temporary modes of TECA rules allow for transactions of..