Análise comparativa dos métodos determinísticos e probabilísticos na segurança de fundações superficiais.

Abstract

This research analyses the safety of foot foundations by comparing deterministic and probabilistic methods. There is a big difficulty in predicting soil behaviour with deterministic methods, but they are the most used in Brazil, because the need for more knowledge development that covers the interaction between soil and foundations is well known. One of the most used probabilistic methods is the Point Estimation Method (PE). In this way, this work analyses and compares the use of probabilistic and deterministic methods in the analysis of the safety of foot foundations in a built in the district of Manaíra in the city of João Pessoa. The following methodology was used to develop this work: literature review about the probability of ruin and safety factor in foot foundations, obtaining geotechnical data from the site, and deterministic and probabilistic analysis of the selected foundation. With the work, it was concluded that the deterministic method may not be the best way to guarantees the security of the foundation and that the probabilistic methods give to the designer a much greater capacity to predict the behaviour of the soil, allowing the conception of a more efficient project with economy and security.