Evaluación de la dependencia en el diseño estructural de grupos de pilotes por fricción frente a la variabilidad de las propiedades geotécnicas del suelo
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Date
2019
Authors
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Idioma
es
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Publisher
Universidad Andrés Bello
Nombre de Curso
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Abstract
El diseño estructural de pilotes representa una de las últimas etapas del proceso de
diseño de fundaciones profundas, el cuál comienza en la etapa de estimación de las
cargas trasmitidas por la superestructura, lo cual se puede realizar en conjunto con la
caracterización del depósito y la definición de parámetros geotécnicos (Hannigan, 2006);
para posteriormente determinar las longitudes y espaciamientos que deberán tener los
pilotes dentro del grupo, y así obtener los esfuerzos internos que deberá soportar la
sección dada su geometría y condiciones en cual se emplaza.
El presente trabajo busca identificar la variabilidad en el diseño estructural de pilotes
frente a la variación de parámetros geotécnicos, para lo cual se realizará el diseño
geotécnico y estructural de pilotes sometidos a cargas estáticas, tanto verticales como
laterales provenientes de una edificación de 5 pisos de altura. Respecto al depósito de
suelo a estudiar, este corresponde a un suelo arcilloso estratificado de acuerdo con el
grado de consolidación que presenta, condición que permitirá establecer dos casos de
análisis, en donde el segundo caso se asocia a un mayor grado de preconsolidación.
La respuesta vertical será analizada de acuerdo con los requerimientos de (AASTHO,
2014), referentes a pilotes excavados, mientras que la respuesta lateral se analizará
utilizando la metodología de curvas p-y, mediante el software SoilWorks Foundation
Module, desarrollado por Midas Information Technology.
De acuerdo con el análisis realizado, las variables más influyentes en la variabilidad del
diseño estructural de pilotes son el OCR y el espaciamiento entre pilotes, lo cuales
modifican en cierta manera el comportamiento a flexo-compresión que tiene el elemento,
sin embargo son los requerimientos de armadura mínima los que controlan el diseño
estructural del pilote.
The structural design of piles represents one of the last stages of the design process of deep foundations, which begins at the stage of estimating the loads transmitted by the superstructure, which can be done in conjunction with the characterization of the deposit and the definition of geotechnical parameters (Hannigan, 2006); to later determine the lengths and spacings that the piles must have within the group, and thus obtain the internal efforts that the section must support given its geometry and conditions in which it is located. The present investigation seeks to identify the variability in the structural design of excavated piles against the variation of geotechnical parameters, for which the geotechnical and structural design of piles subjected to static loads, both vertical and lateral from a 5-story building will be carried out tall. Regarding the soil deposit to be studied, this corresponds to a stratified clay soil according to the degree of consolidation that it presents, a condition that will allow two cases of analysis to be established, where the second case is associated with a higher degree of preconsolidation. The vertical response will be analyzed according to the requirements of (AASTHO, 2014), regarding excavated piles, while the lateral response will be analyzed using the p-y curve methodology, using the SoilWorks Foundation Module software, developed by Midas Information Technology. According to the analysis performed, the most influential variables in the variability of the structural design of piles are the OCR and the spacing between piles, which modify in some way the flexion-compression behavior that the element has, however they are the requirements of minimum armor those that control the structural design of the pile
The structural design of piles represents one of the last stages of the design process of deep foundations, which begins at the stage of estimating the loads transmitted by the superstructure, which can be done in conjunction with the characterization of the deposit and the definition of geotechnical parameters (Hannigan, 2006); to later determine the lengths and spacings that the piles must have within the group, and thus obtain the internal efforts that the section must support given its geometry and conditions in which it is located. The present investigation seeks to identify the variability in the structural design of excavated piles against the variation of geotechnical parameters, for which the geotechnical and structural design of piles subjected to static loads, both vertical and lateral from a 5-story building will be carried out tall. Regarding the soil deposit to be studied, this corresponds to a stratified clay soil according to the degree of consolidation that it presents, a condition that will allow two cases of analysis to be established, where the second case is associated with a higher degree of preconsolidation. The vertical response will be analyzed according to the requirements of (AASTHO, 2014), regarding excavated piles, while the lateral response will be analyzed using the p-y curve methodology, using the SoilWorks Foundation Module software, developed by Midas Information Technology. According to the analysis performed, the most influential variables in the variability of the structural design of piles are the OCR and the spacing between piles, which modify in some way the flexion-compression behavior that the element has, however they are the requirements of minimum armor those that control the structural design of the pile
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Tesis (Ingeniero Civil)
Keywords
Pilotes (Ingeniería Civil), Diseño Estructural