Banca de DEFESA: Igor Breno Silva Faria

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Igor Breno Silva Faria
DATE: 24/08/2021
TIME: 10:00
LOCAL: Remoto
TITLE:

Earth dam monitoring by ambient vibrations

KEY WORDS:

Earth dams, Natural frequencies, Modal Operational Analysis, Monitoring

PAGES: 142
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SPECIALTY: Obras de Terra e Enrocamento
SUMMARY:

The monitoring of mining tailings dams is of fundamental importance, especially so that cases such as the recent ruptures in Brazil do not become recurrent. In situations of failure of these big works, the social, environmental, and economic consequences are enormous. Thus, the present study aims to identify the natural frequencies of a tailings dam, as a way of structural monitoring from the Operational Modal Analysis. The natural frequency is a modal parameter that is related to the stiffness and mass of the structure, that is, a dynamic structural characteristic on which it is intended to establish a continuous monitoring. The operational vibrations of the tailings dam were recorded using two seismographs containing triaxial acceleration sensors. The data will be processed based on the Frequency Domain Decomposition technique to obtain the values related to the natural frequencies of the structure. It is intended to carry out the Modal Operational Analysis monthly to confirm and verify some kind of variation in the values of natural frequencies. It is hoped that it will be possible to identify natural frequencies and that the technique can be applied as a way of monitoring tailings dams.

BANKING MEMBERS:
Presidente - CLAUDIO JOSE MARTINS
Interna - HERSILIA DE ANDRADE E SANTOS
Externo à Instituição - MANOEL PORFIRIO CORDÃO - UnB