Título: | HYBRID CONTROL FOR REDUCING BUILDING VIBRATIONS | ||||||||||||||||||||
Autor: |
SUZANA MOREIRA AVILA BENEVELI |
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Colaborador(es): |
PAULO BATISTA GONCALVES - Orientador |
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Catalogação: | 01/NOV/2002 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3124&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3124&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.3124 | ||||||||||||||||||||
Resumo: | |||||||||||||||||||||
In this work the use of structural control is studied to
protect dynamically loaded building structures against
undesirable vibration levels, which can cause human
discomfort and, even more, compromise the building safety
and integrity. The three types of structural control,
passive, ative and hybrid, are analysed to show the
advantages of hybrid control in reducing undesirable
vibration levels. The chosen control mechanism is the so
called tuned mass damper (TMD), due to its large
application in Civil Engineering, having a great number of
these devices been installed in buildings, bridges and
industrial chimneys to control structural vibrations
induced by wind loads. It is also verified the influence of
TMD non linear stiffness on the main system behaviour. The
use of multiple tuned mass dampers is studied as a possible
way of improving the TMD robustness and performance. The
hybrid mass damper (HMD) behaviour and efficiency
comparing to the passive mass damper is analysed in detail.
To calculate the control force the following control
algorithms are used: classical optimum linear control,
instantaneous optimum control and non-linear optimum
control. A strategy to define the weighting matrices used
in the instantaneous optimum control algorithm that
minimizes the harmonic response amplitude is presented.
Several numerical examples are presented aalong the work.
The results show that the hybrid control is more efficient
that the passive or active control used separately,
requiring smaller forces reducing in this way the cost of
the control system. The hybrid control system showed to be
more efficient in reducing vibrations caused by loadings
which had different frequencies from that considered on the
passive control design. Moreover it was shown that hybrid
control has a satisfactory perfomance when discrepancies in
natural frequency occur.
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