Abstract
ABSTRACT The use of new wood species in construction requires knowledge of their properties for safer and more economical structural sizing. In Brazil, structural projects are carried out according to the standard document ABNT NBR 7190:1997. Tests required by this standard for the complete characterization of species require large machines with high costs, which are present only in large research centers. Considering the lack of experimental determination, this study aimed, with the help of analysis of variance of regression models, to investigate the possibility of estimating, through apparent density, wood properties obtained in tests where failure is considered fragile, allowing the estimation of properties of species still little used. Ten wood species belonging to the hardwood group (cambara, cedro, cedrorana, copaiba, angelim-araroba, castelo, oiticica-amarela, guarucaia, guaicara, and garapa), covering all strength classes established in the standard ABNT NBR 7190:1997, were used. The results showed that shear strength parallel to the grain (fv0) was the only property that could be estimated by apparent density (ρ12), with an R2 above 50%. Tensile strength normal to the grain (ft90) and splitting strength (fs0) showed poor fit quality.
Highlights
Wood has been widely used since the dawn of humanity, present in usual human activities, such as overcoming natural obstacles, transportation, agriculture, among others
Building with wood results in waste reduction, as steel and concrete buildings produce 6 to 16% more solid waste than wood, both in manufacturing and construction (Wang et al, 2014)
This study aimed to evaluate, based on the Brazilian Standard ABNT NBR 7190 and regression models based on analysis of variance (ANOVA), the possibility of estimating wood strength properties obtained in tests where failure is fragile, from apparent density
Summary
Wood has been widely used since the dawn of humanity, present in usual human activities, such as overcoming natural obstacles, transportation, agriculture, among others. Wood has high strength in relation to its weight, being this ratio three times higher than for steel and ten times higher than for concrete (Calil Júnior & Dias, 1997). It is a biodegradable, reusable, and recyclable material. Steel and concrete buildings incorporate and consume from 12 to 20% more energy than wood buildings. Building with wood results in waste reduction, as steel and concrete buildings produce 6 to 16% more solid waste than wood, both in manufacturing and construction (Wang et al, 2014)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
