Giovana de Brito Silva

Idiomas

Projetos de pesquisa

• 2016 - 2016

  Seismic Behavior of Buildings with Tanks Containing Various Liquids, Descrição: The idea of damping is defined as the improvement on the structural performance if a portion of the input energy can be absorbed, not by the structure itself, but by some type of supplemental device. An energy dissipation mechanism is an important part of a Tuned Mass Damper System (TMDs), since it reduces the earthquake effect of a building to a manageable level. The goal of this experiment is to better understand and also to compare the direct consequence of installing a relatively massive tank filled with either air, water or oil, on top of a structure subjected to seismic loads. The properties that will be taken into consideration will include the acceleration with respect to height, as well as the maximum displacement at the top of the structure, both before and after installing the liquid tank. The results of these parameters will determine whether such water/oil/air masses aid in the seismic safety of a building or reduce its dynamic responses. For the experiment, a 3-story scaled model with potentiometers (for measurement of story displacements) and accelerometers (for measurement of story acceleration) was used. A sweep test was performed to find out the natural frequency for each case (air, water and oil); A pulse test was performed to find out the damping ratio for each case and seismic shaking tests were performed to figure out the seismic response of a model building for each case. For seismic shaking tests, two earthquake ground motions were applied. One of them is the Northridge Earthquake (1994) and the other one is Chile Earthquake (2010). From the sweep test, we were able to conclude that the natural frequencies have been decreased, and the pulse test showed that the damping ratios have been increased due to the liquid effect. From the seismic shaking tests, the maximum roof displacements have been decreased with addition of a liquid tank. In conclusion, a building with a liquid tank ? water or oil, can provide more damping effect to a building and this may improve the seismic safety of building structures.. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (2) / Mestrado acadêmico: (1) . , Integrantes: Giovana de Brito Silva - Coordenador / Asish Adhikari - Integrante / Yuri Henrique Ferreira Coelho - Integrante / Uksun Kim - Integrante.

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