Banca de DEFESA: WINDSON BEZERRA DE AGUIAR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : WINDSON BEZERRA DE AGUIAR
DATE: 26/08/2022
TIME: 14:00
LOCAL: Pos Graduação Engenharia Civil
TITLE:

A  Progressive Methodology for the Analysis of Stresses Produced by Earthquakes in Concrete Dams: Application to the Jucazinho Dam.

KEY WORDS:

Dams. Nonlinear Analysis. Stresses Analysis. Structural dynamics. Earthquake. Finite Elements.

PAGES: 140
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

In Brazil, it is not common to observe the effects of relevant earthquakes, due to the geological formation of the country, which is completely contained in the South American plate. However, the occurrence of small amplitude events, caused by intraplate seismicity, is quite common. The traditional design methods linked to most Brazilian dams ignore these effects or are based on outdated procedures, such as the seismic coefficient method. This work presents a stress study through a progressive methodology for the Jucazinho dam, located in the state of Pernambuco, Brazil, which is currently undergoing structural repair and rehabilitation. Four different levels of analysis are employed. The first level refers to a pseudo-static analysis, through the application of the seismic load through the seismic coefficient methods, in which the dam behaves like a rigid body, and it is not considered the interactions between dam, reservoir and foundation. Then, a pseudo-dynamic analysis is studied, which checks the spectral response of the earthquake in the dam, considering the elasticity of the structure. After that, a new analysis is performed, but verifying how stresses when applying a seismic load as a time series horizontal acceleration. The dam, foundation and the reservoir are modeled using the Finite Element Method, considering an interaction between subsystems. Finally, a last analysis is considered, which has a model similar to the previous one, but now considering the physical non-linearity of the material that makes up a structure. Throughout the studies, it is possible to verify the difference of the analysis in the dam when considering a conservative effect, expanding the analysis to a more sophisticated and more complex model.

BANKING MEMBERS:
Externo à Instituição - MARCUS VINICIUS GIRAO DE MORAIS - UnB
Presidente - 2250444 - RENATO DE SIQUEIRA MOTTA
Interna - 1128124 - ROMILDE ALMEIDA DE OLIVEIRA