| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 8.94 MB | Adobe PDF |
Advisor(s)
Abstract(s)
Este trabalho tem como objetivo realizar uma retroanálise de um muro de suporte de
grande dimensão, construído em concreto armado e localizado na cidade de Seia, em
Portugal, buscando entender os fatores que ocasionaram a deformação central de atualmente
mensurada em 24 cm.
Nesta perspectiva, inicialmente foi realizada uma análise crítica dos projetos de
estabilidade do muro e uma inspeção in loco, com o objetivo de diagnosticar as patologias,
realizar ensaios não destrutivos na estrutura e coletar amostras deformadas do solo de aterro
para a posterior caracterização. A partir disso, realizou-se uma análise do grau de risco da
estrutura pelo Método Failure Mode and Effect Analysis (FMEA), com o intuito de
quantificar a criticidade para diferentes classificações de acordo com o tipo de falha e o grupo
de origem das patologias do muro de suporte.
Paralelamente à análise FMEA, a partir da amostra de solo de aterro coletada in loco,
foram realizados ensaios em laboratório para a caracterização do material, os quais serviram
como referência para a obtenção dos parâmetros necessários para análise com base no Método
dos Elementos Finitos (MEF), com o propósito de examinar, principalmente, a deformação da
estrutura e do aterro. Para isso, foi utilizado o software PLAXIS 2D V22.01, uma ferramenta
de análise bidimensional adequada a problemas axissimétricos e estados plano de deformação.
Deste modo, procedeu-se aos cálculos para estimar os parâmetros de resistência que
foram retroanálisados, buscando alcançar uma deformada mais próxima possível da realidade.
Assim, com a obtenção dos parâmetros retroanalisados, realizou-se uma análise de forma a
entender quais fatores e ações influenciaram esses parâmetros na realidade, ocasionando a
deformação no muro de suporte.
ABSTRACT: This study aims to perform a retroanalysis of a large retaining wall, built in reinforced concrete and located in the city of Seia, Portugal, seeking to understand the factors that caused the central deformation of 24 cm. In this perspective, a critical analysis of the stability design of the wall and an in situ inspection were initially performed in order to diagnose the pathologies, to perform nondestructive tests on the structure and to collect deformed samples of the backfill soil for further characterisation. From this, an analysis of the risk level of the structure was performed using the Failure Mode and Effect Analysis Method (FMEA), in order to quantify the criticality for different classifications according to the type of failure and the group of origin of the pathologies of the retaining wall. In parallel to the FMEA analysis, laboratory tests were performed on the backfill soil sample collected in loco, for the characterisation of the material, which served as a reference to obtain the necessary parameters for analysis based on the Finite Element Method (FEM), with the purpose of examining, mainly, the deformation of the structure and the surrounding backfill. For this, the software PLAXIS 2D V22.01, a two-dimensional analysis tool suitable for axis-symmetric problems and plane strain states, was used. Thus, calculations were made to estimate the strength parameters that were retroanalyzed, seeking to achieve a deformation as close as possible to reality. Therefore, after obtaining the retroanalyzed parameters, an analysis was performed in order to understand which factors and actions influenced these parameters in reality, causing the deformation in the retaining wall.
ABSTRACT: This study aims to perform a retroanalysis of a large retaining wall, built in reinforced concrete and located in the city of Seia, Portugal, seeking to understand the factors that caused the central deformation of 24 cm. In this perspective, a critical analysis of the stability design of the wall and an in situ inspection were initially performed in order to diagnose the pathologies, to perform nondestructive tests on the structure and to collect deformed samples of the backfill soil for further characterisation. From this, an analysis of the risk level of the structure was performed using the Failure Mode and Effect Analysis Method (FMEA), in order to quantify the criticality for different classifications according to the type of failure and the group of origin of the pathologies of the retaining wall. In parallel to the FMEA analysis, laboratory tests were performed on the backfill soil sample collected in loco, for the characterisation of the material, which served as a reference to obtain the necessary parameters for analysis based on the Finite Element Method (FEM), with the purpose of examining, mainly, the deformation of the structure and the surrounding backfill. For this, the software PLAXIS 2D V22.01, a two-dimensional analysis tool suitable for axis-symmetric problems and plane strain states, was used. Thus, calculations were made to estimate the strength parameters that were retroanalyzed, seeking to achieve a deformation as close as possible to reality. Therefore, after obtaining the retroanalyzed parameters, an analysis was performed in order to understand which factors and actions influenced these parameters in reality, causing the deformation in the retaining wall.
Description
Keywords
Muros de suporte Patologias em concreto armado Failure Mode and Effect Analysis (FMEA) Método dos Elementos Finitos