O artigo trata de um estudo desenvolvido no Parque Mãe Bonifácia, grande área verde na região central de Cuiabá, MT, entre novembro de 2007 e outubro de 2008, com o objetivo de avaliar a influência das diferentes intervenções urbanísticas sobre o ambiente térmico do lugar e os possíveis impactos destas nos níveis de estresse térmico a que estão submetidos os organismos dos usuários do espaço. A investigação dos diferentes microclimas foi realizada mediante medições fixas, na praça principal do Parque, e móveis, ao longo das trilhas. A aplicação da metodologia permitiu registrar atenuações da temperatura do ar de até 3,0 °C nas trilhas mais estreitas, onde foi preservada a vegetação do lugar, enquanto outros espaços construídos no interior do Parque apresentaram elevações máximas de até 3,2 °C, revelando a necessidade de precauções especiais para a prática de atividades físicas, especialmente na estação seca. Esses resultados sugerem que existe uma relação direta entre os padrões de ocupação do solo, topografia e características da vegetação de cada microespaço e o ambiente térmico do lugar, e que as intervenções do projeto, em alguns de seus espaços, não foram compatíveis com os rigores climáticos da região, acentuando as sensações de desconforto térmico.
This study involved the study of physical and mechanical properties of Eucalyptus umbra wood for its use in timber structures. Two physical and fourteen mechanical properties tests were performed according to Brazilian code ABNT NBR 7190:1997. Two moisture contents were considered: above the Fiber Saturation Point (30%) and standardized point 12%. Decreasing the moisture content, this study presented an increase in eight mechanical properties. Oppositely, five mechanical properties presented decreasing of values, and one single variable persisted stable. But statistical perspective supported by the t-test, only three mechanical properties (f t90 , f H0 and W) increased significantly. According to results obtained in this study, it is possible to use Eucalyptus umbra wood as raw material for structures.
Eucalypt wood is an important raw material with multiple uses applied for furniture, pulp and paper, charcoal, biomass, and construction. Sixteen tests were performed to evaluate physical and mechanical properties of Eucalyptus triantha, which could estimate the possibility of utilization of this woody material in construction. In all, about 267 repeats were realized. Two moisture contents were regarded according to the Brazilian and American standard documents: fiber saturation point (30%) and standard dried point (12%). Results were statistically treated with t-test and demonstrated increases in six mechanical properties from Eucalyptus triantha wood species: rupture moduli in perpendicular and parallel compressions and static bending; elasticity moduli in parallel tensile, perpendicular compression, and static bending. Volumetric mass and bulk densities were practically stable. Physical and mechanical properties estimation evinced that Eucalyptus triantha wood can be used in structural elements.
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