Banca de DEFESA: Danilo Vítor dos Santos Mützenberg

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Danilo Vítor dos Santos Mützenberg
DATE: 15/07/2022
TIME: 14:00
LOCAL: TEAMS
TITLE:

NUMERICAL-EXPERIMENTAL STUDY OF THE LOAD TRANSFER MECHANISM IN THE DISTRIBUTION LAYER OF FOUNDATIONS REINFORCED WITH RIGID INCLUSIONS

KEY WORDS:

 numerical modeling, foundations, rigid inclusion, soft soil, rupture mechanism, design procedure.

PAGES: 158
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SUMMARY:

The technique of rigid inclusions has been commonly used to reinforce soft soils of road and railway embankments. However, nowadays it has been used to reduce costs of building foundations. A numerical study developed by Chevalier et. al. (2011) shows that the load transfer mechanism is different when a rigid slab is used instead of an embankment and its efficiency is considerably higher. This paper presents the results of a numerical-experimental study of the load transfer mechanism between the head of an inclusion and the distribution layer under a rigid slab, considering a cohesive-granular soil formed by a tropical soil characteristic of the Federal District. The numerical models were calibrated and validated using data from simplified, full-scale physical models. The development of the numerical model with discrete elements method (DEM) aimed to simulate and validate the development of the load transfer mechanism observed in the physical model. From the definition of this mechanism, a finite element method (FEM) model was developed, and it allowed simulating the load-transfer platform´s (LTP) behavior observed in the physical and DEM models. After calibration and adjustment of the strength and compressibility parameters of the materials used in the LTP from laboratory tests and the physical models to the Hardening Soil (HSM) constitutive model, probable rupture mechanisms in the LTP were studied using the models based on the FEM and the calibrated and adjusted parameters for the HSM, observing the influence of the shear strength parameters of the LTP and the geometry of the load transfer cone on the rupture mechanism. With the results observed, a methodology was developed for obtaining the load capacity of the inclusion head that allows the definition of the maximum load that can be transferred by the load-transfer cone, which allows obtaining the maximum CDC thickness and the minimum spacing between inclusions.

BANKING MEMBERS:
Presidente - 2161425 - JUAN FELIX RODRIGUEZ REBOLLEDO
Interno - 404375 - ENNIO MARQUES PALMEIRA
Externo à Instituição - JULIAN ASDRUBAL BURITICA GARCIA - UFSC