Avaliação das estruturas de cobertura em madeira de um galpão de estoque de produtos químicos

Andrade, Jairo Ribas de; Almeida, Diego Henrique de; Almeida, Tiago Hendrigo de; Christofóro, André Luis; Stamato, Guilherme Corrêa; Lahr, Francisco Antônio Rocco

doi:10.1590/s1678-86212014000300006

Cited by 19 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The degradation of wood in use may occur due to the attack of xylophagous organisms or their exposure to weather conditions of high humidity and temperature contents (Andrade Junior et al, 2014;Barcík et al, 2015;Brito et al, 2016;Matos & Molina, 2016;Teodorescu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Influence of Exposure Time to Operating Temperature on Shear Strength of Wood Used in Roof Structures

Christofóro

Almeida

et al. 2019

Eng. Agríc.

View full text Add to dashboard Cite

Wood is one of the main materials used in the constructing of covering structures (roofs) because of its versatility. Under this situation, due to solar radiation incidence, the temperature can exceed 60 °C and, such as other environmental conditions, influence the mechanical properties of the wood in use. The aim of this research was to study the influence of exposure time of the wood of four different hardwood species at a temperature of 60 °C on the shear strength parallel to fibers. The wood of the following species was used: Cupiúba (Goupia glabra), Eucalyptus (Eucalyptus saligna), Garapeira (Apuleia leiocarpa), and Jatobá Tamarindo (Hymenaea sp.). In order to investigate the effect of exposure time (0, 168, 456, 720, and 2160 hours) of the wood species in an oven (60 °C) on the values of shear strength in the direction parallel to fibers, an analysis of variance (ANOVA) was carried out at 5% significance level. According to the results, the time the wood was exposed to the operating temperature significantly influenced the shear strength in the direction parallel to fibers. In addition, all species showed a decrease in shear strength after 456 hours of exposure at a constant temperature of 60 °C.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Exposure Time to Operating Temperature on Shear Strength of Wood Used in Roof Structures

Christofóro

Almeida

et al. 2019

Eng. Agríc.

View full text Add to dashboard Cite

show abstract

“…Wood is a renewable source material with important role in the furniture, paper and pulp, and construction industries [1][2][3][4]. In this last segment, wood can be used in frames, building components and structural elements such as pillars, trusses and beams [6,7].…”

Section: Introductionmentioning

confidence: 99%

Static Bending Loading Diagram in Wood

Almeida¹,

Almeida²,

Christofóro³

et al. 2018

ijme

View full text Add to dashboard Cite

Three-point static bending test according to the code NBR 7190/1997 allows to determine two wood properties: modulus of elasticity and conventional value of Strength. According to this code, determination of the modulus of elasticity must be through loading cycle occurring between 10% and 50% of the rupture of an estimation sample. However, it is usual to perform these cycles using L/200 and L/1000 deflection parameters, where L is the value of the length. Given this, it becomes necessary to evaluate the loading diagrams in the bending tests to find out the existence of patterns on it. This work aimed to analyze the loading curves in the three-point static bending tests in eighteen free of defect samples, of square section and L/h equal to fourteen, made with Simarouba amara Aubl. wood at 12% moisture content. Analysis was focused on the force percentages applied (in relation to the rupture) for these samples present L/1000, L/200 and L/100 deflection values, and the elastic limit (LE) (in relation to the rupture) was determined. Results of the mean percentages were 4.11%, 22.51%, 44.63% and 78.51% for L/1000, L/200, L/100 and LE, respectively. According to results, it was possible to conclude that there is a pattern of samples behaviors subjected to three-points static bending, making possible to use deflection parameters in the loading cycles.

show abstract

“…Wood can be used as structural material such in bridges, roofs, footbridges, among others, since their physical and mechanical properties are known, aiming development a design according to Standard Codes, as example Brazilian Standard Code ABNT NBR 7190:1997 [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Embedment Parallel to the Grain Strength of the Schizolobium amazonicum Herb Wood Specie

Almeida¹,

Almeida²,

Pinheiro³

et al. 2017

ijme

View full text Add to dashboard Cite

Wood is one of the main raw materials used by man in several uses. It can be used in furniture and package industries, and also in components for building construction. For all these purposes, it is necessary to know the physical and mechanical properties of wood specie being used. Brazilian Code ABNT NBR 7190:1997, in its Annex B, presents methods for determining wood mechanical properties, among them the embedment parallel to grain. This property is important because it relates to the design of bolted and nailed joints in timber structures. This research aims to the experimental determination of embedment strength parallel to grain strength for Schizolobium amazonicum Herb, a wood specie recently used for structural purposes. Results showed that embedment strength for Schizolobium amazonicum Herb wood specie is lower when compared with traditional tropical essences, but sufficient for some structural applications.

show abstract

Avaliação das estruturas de cobertura em madeira de um galpão de estoque de produtos químicos

Cited by 19 publications

References 6 publications

Influence of Exposure Time to Operating Temperature on Shear Strength of Wood Used in Roof Structures

Influence of Exposure Time to Operating Temperature on Shear Strength of Wood Used in Roof Structures

Static Bending Loading Diagram in Wood

Embedment Parallel to the Grain Strength of the Schizolobium amazonicum Herb Wood Specie

Contact Info

Product

Resources

About