Evaluation of the constitutive model Generalized Bounding Surface Model in the simulation of the behavior of cohesive soils

Autor:	Molina Rincón, Tania Paola
Přispěvatelé:	Nieto Leal, Andrés
Jazyk:	Spanish; Castilian
Rok vydání:	2019
Předmět:	Programa Calbr8 Regla de flujo asociada Modelo Constitutivo Suelos Cohesivos Rule associated flow MECANICA DE SUELOS Cohesive Soils Constitutive model Calbr8 Program Generalized Bounding Surface Model FISICA DE SUELOS
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Popis:	Conociendo las propiedades mecánicas y el comportamiento esfuerzo - deformación del suelo, se pueden hacer diseños más precisos donde se utilicen modelos constitutivos robustos, los cuales predicen de una mejor manera el comportamiento del suelo para caracterizar el terreno en donde se pretendan construir futuros proyectos y garantizar de esta manera la estabilidad que tendrá la obra civil. El modelo Generalized Bounding Surface (GBSM) permite predecir computacionalmente el comportamiento de suelos cohesivos tanto isotrópica como anisotrópicamente consolidados, usando la regla de flujo sociada. Es por esto que se busca simular una seria de suelos que permita validar el modelo, surgiendo como interrogante: ¿Cuál es el desempeño del modelo constitutivo Generalized Bounding Surface Model (GBSM) en la simulación del comportamiento de suelos cohesivos bajo cargas monotónicas? La evaluación de este modelo constitutivo se hizo comprobando la versión isotrópica y anisotrópica con la regla de flujo asociada, en cinco diferentes tipos de suelos. Recopilando datos de las distintas tesis, artículos y fuentes de información que tengan ensayos experimentales, así mismo digitalizar las gráficas obtenidas, y de esta manera se completan los datos base para el uso del programa Calbr8, que permite calibrar los parámetros necesarios para ejecutar las representaciones correspondientes. Los datos obtenidos se procesaron e interpretaron comparando las simulaciones hechas con respecto a los resultados experimentales. Como resultados finales una vez se culminan las simulaciones en el programa Calbr8 y aplicando el GBSM, se obtuvieron las gráficas de los estados de esfuerzos, deformación axial y presión de poros, para ser comparadas con respecto a las trayectorias experimentales.Comprobando que el modelo GBSM está programado para pronosticar el comportamiento mecánico de cada suelo, implementando la teoría de la superficie limite, según sus parámetrosy la calibración de las variables propias de este, los resultados comprueban la aplicación optima de este modelo en la geotecnia. Knowing the mechanical properties and the stress - deformation behavior of the soil, more precise designs can be made where robust constitutive models are used, which better predict the behavior of the soil to characterize the land where future projects are planned and guarantee in this way, the stability that civil works will have. The Generalized Bounding Surface (GBSM) model allows to computationally predict the behavior of cohesive soils, both isotropic and anisotropically consolidated, using the rule of sociated flow. That is why we are looking to simulate a series of soils that validate the model, emerging as a question: What is the performance of the Generalized Bounding Surface Model (GBSM) in the simulation of the behavior of cohesive soils under monotonic loads? The evaluation of this constitutive model was made by checking the isotropic and anisotropic version with the associated flow rule, in five different soil types. Collecting data from the different theses, articles and information sources that have experimental tests, likewise digitize the obtained graphs, and in this way the base data for the use of the Calbr8 program is completed, which allows to calibrate the necessary parameters to execute the representations corresponding. The data obtained were processed and interpreted by comparing the simulations made with respect to the experimental results. As final results once the simulations in the Calbr8 program are completed and applying the GBSM, the graphs of the states of stress, axial deformation and pore pressure were obtained to be compared with respect to the experimental trajectories. Checking that the GBSM model is programmed to predict the mechanical behavior of each soil, implementing the theory of the surface limit, according to its parameters and the calibration of the variables of this, the results prove the optimal application of this model in geotechnics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::8ce18e9b2ced9b47ff853bd4afde28b9 https://hdl.handle.net/10654/21143 Zobrazit plný text záznamu