Avaliação de propriedades mecânicas da madeira de Pinustaeda provenientes de placas de cross laminated timber

Vilela, Ramon; Mascia, Nilson Tadeu

doi:10.1590/s1678-86212021000400560

Cited by 3 publications

(1 citation statement)

References 17 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, as a result of their fast growth, the wood originating from these forests exhibits natural flaws. As a result, grading the lumber is crucial before its application in structures [5]. According to [6], visual defects influence the wood's mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Performance of Doweled Connections Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) in Wood Pinus spp.

Camargo

Christofóro

Barcarolo

et al. 2023

Forests

View full text Add to dashboard Cite

In line with technological advancements, the construction industry worldwide has sought more efficient building systems in relation to aspects such as increased productivity, reduced material waste and meeting the growing demand. The objective of this research was to use structural joints composed of composite dowels in laminated wood beams as an alternative to connect pieces of wood. Composite materials are composed of a matrix phase and a reinforcement phase and, in civil engineering, are generally applied as reinforcements in concrete structures. This article presents the structural performance of laminated pine timber with composite dowels made of fiber-reinforced polymeric resin (epoxy resin, hardener and glass fiber) (glass-fiber-reinforced polymer, GFRP) with a diameter of 12.5 mm, which was subjected to tensile force in the direction of the connection. For this, an experimental program was carried out that included characterization of the GFRP dowel, characterization of the woods used to make the connection and a tensile test of the connections with the dowels reinforced with fiberglass through a prototype designed specifically for the test. Subsequently, the results were compared with those observed in the literature. In the comparisons, it was possible to conclude that the joints with FRP pins exhibited better performance in terms of shear strength per section than those such as common nails, helical nails (Ardox) and composite structural pins (half-lap, 90°), which were 3.8 mm, 3.4 mm and 6 mm in diameter, respectively. This indicates that this composite material has potential for application in these types of connections. As an original contribution, it proves the feasibility of using this material in dowel joints for wooden structures.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Performance of Doweled Connections Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) in Wood Pinus spp.

Camargo

Christofóro

Barcarolo

et al. 2023

Forests

View full text Add to dashboard Cite

show abstract

Determination of the Elastic Modulus of Brazilian Tropical Wood at High Temperatures Using the Impulse Excitation Technique (IET)

Alves,

Júnior,

Carrasco

et al. 2024

Preprint

View full text Add to dashboard Cite

Wood, as a renewable and highly abundant material, has been receiving increasing attention for use in high-performance applications, such as a structural element subjected to high temperatures. For its successful implementation in the construction or timber industry sector, it is crucial to understand its behavior during and after exposure to high temperatures. In this study, the red angelim wood, Dinizia excelsa, is subjected to high temperatures, up to a temperature of 508 K, using the dynamic excitation wave propagation test. For the study, the samples tested in the furnace were dimensioned in six distinct directions: the three main ones (radial, tangential, and longitudinal) and three intermediate ones (longitudinal-radial, longitudinal-tangential, and radial-tangential). The static test used only the main directions of wood orientation. The values of elasticity modulus exhibited a reduction after the heat treatment, resulting in significant decreases of up to 45%. The results obtained demonstrated that the excitation wave propagation method was effective in estimating the elasticity modulus at room temperature up to 508 K. Therefore, this study contributed to the construction of a database that can be expanded by future research focused on Brazilian woods.

show abstract

Numerical Evaluation of the Influence of Using Carbon-Fiber-Reinforced Polymer Rebars as Shear Connectors for Cross-Laminated Timber–Concrete Panels

Alves,

Pessôa,

Jardim

et al. 2024

Buildings

View full text Add to dashboard Cite

Carbon fiber-reinforced polymer (CFRP) sheets have been used to reinforce cross-laminated timber (CLT)–concrete systems in recent years. The existing studies have indicated that the use of CFRP rebars as shear connectors in CLT–concrete panels can improve the structural performance of these elements. However, the application and understanding of CFRP rebars as shear connectors still need to be improved, since comprehensive studies on the subject are not available. Therefore, this research aimed to evaluate the structural performance of CLT–concrete panels with CFRP rebars as shear connectors through finite element (FE) numerical simulation. A parametric study was conducted, varying the connector material, the number of CLT layers, the connector insertion angle, and the connector embedment length. According to the results, panels with CFRP connectors showed a higher maximum load, bending strength, and maximum bending moment than panels with steel connectors. The regression models revealed that the parameters analyzed explained between 80.2% and 99.9% of the variability in the mechanical properties under investigation. The high explanatory power (R2) of some regression models in this study underscores the robustness of the models. The number of CLT layers and the connector material were the most significant parameters for the panels’ maximum load, displacement at the maximum load, ductility, bending strength, and maximum bending moment. The number of CLT layers and the connector insertion angle were the most significant parameters for the panels’ effective bending stiffness. This research highlights the importance of studies on CLT–concrete composites and the need to develop equations to estimate their behavior accurately. Moreover, numerical simulations have proven very valuable, providing results comparable to laboratory results.

show abstract

Avaliação de propriedades mecânicas da madeira de Pinustaeda provenientes de placas de cross laminated timber

Cited by 3 publications

References 17 publications

Experimental Analysis of the Performance of Doweled Connections Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) in Wood Pinus spp.

Experimental Analysis of the Performance of Doweled Connections Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) in Wood Pinus spp.

Determination of the Elastic Modulus of Brazilian Tropical Wood at High Temperatures Using the Impulse Excitation Technique (IET)

Numerical Evaluation of the Influence of Using Carbon-Fiber-Reinforced Polymer Rebars as Shear Connectors for Cross-Laminated Timber–Concrete Panels

Contact Info

Product

Resources

About