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Isoladores Sísmicos em Edifícios
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Civil engineering seeks to protect buildings against seismic action. Traditional design is based on material
ductility, allowing controlled structural damage to occur in order to prevent building collapse. However, this
approach results in inoperable structures and requires costly repairs after an earthquake.
Base isolation emerges as a technological alternative that decouples the structure from ground motion and
preserves its integrity. This dissertation aims to analyze the different available seismic protection technologies,
their regulatory framework, and their practical insertion in the construction industry. The study classifies and
evaluates the mechanical operation of passive, active, and semi-active systems.
The research uses a qualitative and bibliographic review methodology. The work details the technical
specifications, constitutive models, and qualification tests of commercial passive devices, such as high damping
rubber bearings (HDRB), lead rubber bearings (LRB), and friction pendulum systems (FPS). In addition, the
document addresses the design requirements and analysis methods stipulated by European regulations, especially
Eurocode 8.
The implementation of these technologies increases direct construction costs, with an initial rise ranging
from 10.3% to 23.6%. Nevertheless, the building’s life cycle analysis demonstrates the economic viability of the
solution. The total cost over the useful life becomes 2.5% to 4.8% lower than that of fixed-base structures. This
savings is justified by an 82% to 84% reduction in costs associated with post-earthquake losses and by ensuring
the operational continuity of the infrastructure
Descrição
Palavras-chave
Eurocódigo 8 Isolamento de base Sistemas de proteção sísmica Dinâmica de estruturas Baseisolation Seismic protection systems Structural dynamics