Banca de DEFESA: Philipe Queiroz Rodrigues

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Philipe Queiroz Rodrigues
DATE: 22/01/2024
TIME: 14:30
LOCAL: Videoconferência - http://ppgfau.unb.br/component/agenda/agendas
TITLE:

Probabilistic Seismic Vulnerability Index of Culturally Significant Buildings in Brasília

KEY WORDS:

Safety Level, reliability, Brasília palaces, structural engineering, reinforced concrete

PAGES: 300
BIG AREA: Ciências Sociais Aplicadas
AREA: Arquitetura e Urbanismo
SUMMARY:

In 2023, two major earthquakes occurred in Turkey and Morocco, burying thousands of lives and destroying entire cities. The absence of similar natural disasters in Brazil has led to two misconceptions: the widespread belief that the country is aseismic, and that disasters are events that transcend human will and control, therefore, little can be done to prevent or mitigate them. The fact is that only in the year 2022, 398 seismic events were recorded in Brazil, and it is illusory to believe that a strong earthquake will never hit historical sites in Brazil. Moreover, a large part of buildings with cultural significance were not built with earthquake-resistant techniques and prescriptions. It is essential to understand that the impact of a single disaster on historical heritage far exceeds, in a large proportion, the progressive deterioration of the property and, sometimes, can result in the total collapse of the property. Although heritage plays an important role in social cohesion and sustainable development, few studies have evaluated the seismic vulnerability of cultural heritage. In the same way as nuclear power plants, which are necessarily verified for a minimum level of seismicity, it is necessary to verify buildings with cultural significance, as the loss of historical heritage due to disasters is just as catastrophic. This work aims to assess the seismic vulnerability of cultural heritage buildings in Brasília and their respective seismic safety levels. Initially, six buildings were defined for case study: Itamaraty Palace, Alvorada Palace, Justice Palace, Supreme Federal Court Palace, Planalto Palace, and Brasília Metropolitan Cathedral. It began with the collection of the original structural plans for three-dimensional modeling of the structural elements that make up these buildings. After this, the Japanese method adapted to the Brazilian reality based on the quantities extracted from the parametric modeling was applied. Among the analyses developed, the impact of a possible change in the seismic zone of Brasília on the reserve of resistant capacity of the Heritages was studied. Simultaneously, the Japanese method was implemented computationally to optimize the analyses. In the second part of the work, the Japanese method was adapted to a probabilistic model by considering uncertainties through the random sampling of resistance and demand variables. In this stage, reliability analyses were carried out using the Monte Carlo simulation technique to determine the seismic safety level of each structure. Here, two scenarios were chosen: possible and probable. The first scenario sought to know the seismic safety level of each heritage in any design seismic accelerations, soil class, importance factor, structural configuration, structural deterioration, while in the second scenario (probable), the random sampling of the variables is restricted to the boundary conditions of each historical heritage. Finally, a global sensitivity analysis was carried out to identify the contribution of each variable in the seismic vulnerability assessment using the Morris Method.

COMMITTEE MEMBERS:
Externo à Instituição - HUMBERTO SALAZAR AMORIM VARUM - UNIPORTO
Presidente - 2352146 - JOAO DA COSTA PANTOJA
Interno - 2212892 - MARCIO AUGUSTO ROMA BUZAR
Externo à Instituição - PAULO DE SOUZA TAVARES MIRANDA - IFCE