Banca de DEFESA: PEDRO EUGÊNIO SILVA DE OLIVEIRA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : PEDRO EUGÊNIO SILVA DE OLIVEIRA
DATE: 11/04/2023
TIME: 13:30
LOCAL: Pós-Graduação Engenharia Civil
TITLE:

Estimate Of Average Settlement In Foundation: A New Method

KEY WORDS:

Composite Foundation, Deep Foundation, Pile Group

PAGES: 228
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The concept of deep and superficial foundation undergoes an international process of revisitation. Of the various issues raised, the main question is the behavior of composite foundations, such as the piled raft. Which is composed of the junction of superficial and deep foundations, both working concomitantly. However, recently the paradigm has been inverted, meaning that composite foundations are no longer written as presenting two dimensions (superficial and deep), but superficial and deep foundations would be a particular and extreme case of the piled raft that starts to represent the generalization of the foundation concept from this point of view. Therefore, themes are intertwined to weave the background of knowledge about the behavior of foundations. Topics such as group effect, verification of the service limit state and optimization of the arrangement of the piles in the system, assume centrality in the research and development of the articles. From the world to Brazil, from Brazil to Pernambuco, efforts are being made to answer questions regarding this new paradigm. Research carried out in Recife, such as by Oliveira et al (2018), Amorim (2019) and Almeida et al (2020), is moving towards elucidating pertinent issues and advancing issues of systematized knowledge so far. This work is based on the extended concept of foundations and aligns with regional and international efforts, to propose a new methodology to predict the average settlement of buildings, that works as a staked raft or at its end as agroup of piles. As a result, it is possible to demonstrate and find a parameter that relates the rigidity of the system (λ), reducing the typically non-linear analysis to a linear and easier-to-manipulate analysis of Improvement Factor versus Demand for Piles (N). 159 cases were evaluated (throughout the bibliographic review) for the application of the methodology, of which 6 were used. Soon after, parametric analysis, numerical validation with two finite element softwares and application for 9 research/construction cases are carried out, of which 3 studied internationally, 2 studied nationally and 4 locally. All the results of the methodology adjustments have an R² correlation coefficient greater than 0.89. A fact that confirms its great potential for application for practical purposes in foundation engineering. Finally, the possibility of estimating λ based on the methodology of Mandolini (2012) is analyzed, which considers the geometry of the foundation. A modification to the method is suggested, in order to consider the peculiarities of the foundation system associated with improvement columns. As a  conclusion, the hypothesis is confirmed, and it is demonstrated that it is possible to estimate the foundation settlements in rafts from the proposed methodology.

COMMITTEE MEMBERS:
Externa à Instituição - BERNADETE RAGONI DANZIGER - UERJ
Presidente - 1413233 - LEONARDO JOSE DO NASCIMENTO GUIMARAES
Externo à Instituição - MAURÍCIO MARTINES SALES - UFG
Externo à Instituição - OLAVO FRANCISCO DOS SANTOS JUNIOR - UFRN
Externo à Instituição - PAULO JOSE ROCHA DE ALBUQUERQUE - UNICAMP