Skip header and navigation

3 records – page 1 of 1.

Evaluation of Brazilian Reforestation Species in Glulam Beams Before and After Preservative Chemical Treatments

https://research.thinkwood.com/en/permalink/catalogue511
Year of Publication
2014
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
de Alcântara Segundinho, Pedro
Calil Neto, Carlito
Dias, Antonio
Calil Junior, Carlito
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Mechanical Properties
Keywords
Brazil
Static Bending Test
Chemical Treatment
Copper Chrome Arsenic
Copper Chrome Boron
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
Although the glulam is a product of the nineteenth century, there are few industries in Brazil. The high cost of the structural elements of glulam is committed at the time, its competitiveness with full tropical sawn timber and reforestation. Being a tropical country, we recommend the use of wood treated to prevent termites attack. This study aims to evaluate the resistance of glulam beams before and after being subjected to chemical treatments with pressure using CCA (Copper Chrome Arsenic) and CCB (Copper Chrome Boron). To that end, we tested 54 glulam beams with nominal dimensions of 9 cm x 9 cm x 200 cm, with wood harvested from forest plantations. These beams were subjected to static bending tests, according to Brazilian standard NBR 8458:1984. After analyzing the experimental data it was concluded that the glulam beams produced from wood of Pinus oocarpa had the best results, taking into account the combination wood-adhesive-treatment, because the physical properties remained the same before and after chemical treatment in fullcell method.
Online Access
Free
Resource Link
Less detail

Evaluation of the Moisture Content in Stiffness Properties of Structural Glulam Beams

https://research.thinkwood.com/en/permalink/catalogue282
Year of Publication
2015
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Lahr, Francisco
Christoforo, André
de Campos, Cristiane
Morales, Elen
Barbosa, Juliana
Panzera, Túlio
Publisher
Scientific.net
Year of Publication
2015
Country of Publication
Switzerland
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Mechanical Properties
Keywords
Modulus of Elasticity
Storage Time
Static Bending Test
Language
English
Research Status
Complete
Series
Advanced Materials Research
Summary
This research aimed to evaluate the influence of storage time (0, 96 hours) of Pinus elliottii pieces and the tests to obtaining modulus of elasticity (static bending and transversal vibration) in glued laminated timber beams, produced with resorcinol based adhesive and 0.8 MPa compaction pressure. After pieces were properly prepared, part of them was used in immediate three manufacturing glulam beams, tested after adhesive cure, and part stored for 96 hours under a roof with a temperature of 25oC and relative humidity of 60% for subsequent manufacturing and testing three other glulam beams. Results of analysis of variance (ANOVA) revealed that the storage period was significant influence in modulus of elasticity obtained in static bending test (8% reduction from 0 to 96 hours). This not occurred with modulus of elasticity obtained by transversal vibration test (no significant influence). ANOVA results showed equivalence of means in both test procedures.
Online Access
Free
Resource Link
Less detail

Experimental Testing of Steel-Wood-Steel Glulam Frame Bolted Connections

https://research.thinkwood.com/en/permalink/catalogue1757
Year of Publication
2016
Topic
Connections
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Author
Salem, Sam
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Topic
Connections
Mechanical Properties
Keywords
Strength
Stiffness
Static Bending
Bolts
Moment Capacity
Beam-to-Column
Failure Modes
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 5041-5048
Summary
The performance of structural members made of engineered-wood products such as glue-laminated timber (Glulam) is greatly influenced by the capacity of their connections. Outcomes of an experimental study undertaken to evaluate the strength and stiffness of steel-wood-steel glulam frame connections are analysed and presented in this paper...
Online Access
Free
Resource Link
Less detail