8. Considerações finais
8.2 Sugestões para trabalhos futuros
Com base na pesquisa desenvolvida, algumas sugestões são apresentadas para trabalhos futuros:
Desenvolver modelos numéricos de elementos finitos tridimensionais (3D) de edifícios com sistemas de isolamento. Estes modelos possibilitariam a análise sísmica de edifícios considerando terremotos nas três direções.
Estudos paramétricos devem ser conduzidos a fim de encontrar os parâmetros ótimos dos sistemas de isolamento, visando reduzir a resposta dinâmica dos edifícios com a mínima resposta dos deslocamentos da base.
Avaliar o desempenho da nova geração de sistemas de isolamento sísmico, baseados em materiais inteligentes, tais como: suportes de elastômero magneto-reológico e suportes de elastômero com ligas de memória de forma (shape memory alloys).
Analisar as metodologias de isolamento propostas na proteção sísmica de outros tipo de estruturas, como por exemplo: pontes, estruturas offshore, usinas nucleares entre outros.
O sistema de excitação utilizado neste trabalho permite reproduzir apenas sinais aleatórios e sinais harmônicos. Desta forma sugerem-se projetos de pesquisa que busquem dimensionar sistemas de excitação em múltiplas direções, destinados a simular sinais reais de terremotos impostos em modelos laboratoriais de escala reduzida.
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APÊNDICE A
Resultados adicionais do estudo
paramétrico dos Sistemas E+SE e E+SR
Os resultados a seguir foram obtidos através de simulações numéricas das equações de movimento dos sistemas E+S.E e E+S.R. Nestas simulações foram utilizados os seis sinais de terremotos previamente selecionados. As respostas sísmicas máximas do sistema E+S.E e E+S.R foram comparadas com as respostas máximas do sistema do edifício E. Assim, valores menores que um, representam reduções e valores superiores a um indicam amplificações da resposta sísmica.
Tabela A1 - Resposta sísmica do sistema E+S.E, sendo 75.4 / e 1.45 %
Resposta Nível Terremotos
1 2 3 4 5 6
0
1.32 0.57 1.38 0.35 1.45 0.31 1.44 0.68 2.32 0.58 2.61 0.55 0.95 0.42 0.21 0.09 0.42 0.11 1.62 0.77 0.67 0.20 1.05 0.23 1 0.61 0.21 0.18 0.03 0.17 0.04 2 0.39 0.17 0.16 0.01 0.10 0.02 3 0.31 0.13 0.15 0.02 0.07 0.02 4 0.29 0.11 0.14 0.02 0.07 0.02 1 0.80 0.27 0.47 0.04 0.35 0.06 2 0.46 0.19 0.34 0.02 0.19 0.04 3 0.35 0.16 0.28 0.02 0.14 0.03 4 0.31 0.14 0.26 0.02 0.13 0.03 1 1.12 0.47 0.49 0.05 0.28 0.08 2 1.14 0.47 0.52 0.05 0.28 0.08 3 1.41 0.57 0.66 0.07 0.34 0.10 4 2.52 0.98 1.20 0.13 0.61 0.19
1 1.32 0.61 1.00 0.06 0.53 0.11 2 1.30 0.61 1.02 0.06 0.52 0.11 3 1.58 0.73 1.28 0.08 0.64 0.13 4 2.79 1.25 2.29 0.14 1.13 0.23
Tabela A2 - Resposta sísmica do sistema E+S.E, sendo 12979 / e 10 %
Resposta Nível Terremotos
1 2 3 4 5 6
0
0.02 0.01 0.11 0.07 0.04 0.06 0.01 0.01 0.09 0.06 0.04 0.06 1.37 1.20 1.29 1.40 1.05 1.60 1.62 1.27 1.85 1.56 1.46 1.77
1 1.17 0.71 2.01 0.75 0.59 0.92
2 0.99 0.66 2.51 0.51 0.43 0.76
3 0.97 0.63 2.83 0.55 0.41 0.83
4 1.02 0.61 3.13 0.65 0.45 0.95
1 1.02 0.57 2.44 0.57 0.66 0.84
2 0.78 0.53 2.62 0.43 0.48 0.72
3 0.75 0.56 2.75 0.41 0.45 0.74
4 0.80 0.56 2.98 0.43 0.47 0.78
1 3.37 2.19 9.14 1.86 1.43 2.85
2 3.49 2.24 9.95 1.94 1.47 2.97
3 4.42 2.77 13.03 2.50 1.84 3.88 4 7.90 4.77 23.62 4.52 3.29 7.10
1 0.02 0.01 0.11 0.07 0.04 0.06
2 0.01 0.01 0.09 0.06 0.04 0.06
3 1.37 1.20 1.29 1.40 1.05 1.60
4 1.62 1.27 1.85 1.56 1.46 1.77
Tabela A3 - Resposta sísmica do sistema E+S.E, sendo 1x10 /
Resposta Nível Terremotos
1 2 3 4 5 6
0
0.02 0.01 0.06 0.10 0.06 0.06 0.02 0.01 0.05 0.08 0.05 0.09 1.50 1.52 1.31 1.51 2.04 2.28 2.46 1.84 1.77 2.36 2.37 3.82 1 1.21 0.94 1.36 0.97 1.12 1.21 2 0.99 0.82 1.39 0.75 0.75 0.84 3 0.93 0.77 1.39 0.73 0.63 0.85 4 0.90 0.70 1.40 0.74 0.60 0.89 1 1.56 0.81 1.58 0.80 1.07 1.46 2 1.10 0.71 1.38 0.54 0.72 1.08 3 0.96 0.67 1.26 0.47 0.62 0.99 4 0.91 0.61 1.21 0.44 0.59 0.93 1 0.98 0.79 1.39 0.76 0.71 0.89 2 0.94 0.76 1.39 0.74 0.66 0.86 3 0.92 0.74 1.39 0.74 0.62 0.87 4 0.91 0.71 1.40 0.74 0.61 0.89
1 1.05 0.73 1.34 0.51 0.68 1.08 2 0.99 0.70 1.29 0.48 0.64 1.02 3 0.94 0.66 1.24 0.46 0.61 0.97 4 0.93 0.63 1.23 0.45 0.60 0.95
Tabela A4 - Resposta sísmica do sistema E+S.R, sendo 5° e 0.8 /
Resposta Nível Terremotos
1 2 3 4 5 6
0
1.96 0.54 1.14 0.36 1.42 0.31 1.69 0.55 1.32 0.37 1.24 0.28 1.04 0.79 0.60 0.49 1.77 1.32 1.30 1.16 0.96 0.88 2.35 1.64 1 0.45 0.29 0.49 0.22 0.59 0.41 2 0.24 0.29 0.29 0.11 0.31 0.22 3 0.25 0.17 0.34 0.08 0.26 0.28 4 0.38 0.27 0.49 0.11 0.39 0.35 1 0.47 0.34 0.50 0.17 0.61 0.38 2 0.25 0.26 0.34 0.09 0.32 0.21 3 0.24 0.21 0.33 0.07 0.26 0.19 4 0.29 0.27 0.44 0.09 0.35 0.22 1 0.18 0.14 0.25 0.06 0.20 0.18 2 0.20 0.15 0.28 0.07 0.21 0.20 3 0.26 0.20 0.32 0.09 0.27 0.26 4 0.33 0.24 0.43 0.10 0.35 0.32
1 0.20 0.18 0.27 0.06 0.21 0.16 2 0.22 0.19 0.30 0.06 0.23 0.17 3 0.25 0.22 0.35 0.07 0.27 0.19 4 0.27 0.25 0.40 0.08 0.32 0.21