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Numerical Analysis of the Bending Properties of Cathay Poplar Glulam

https://research.thinkwood.com/en/permalink/catalogue1222
Year of Publication
2015
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Author
Gao, Ying
Wu, Yuxuan
Zhu, Xudong
Zhu, Lei
Yu, Zhiming
Wu, Yong
Publisher
MDPI
Year of Publication
2015
Country of Publication
Switzerland
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Topic
Mechanical Properties
Keywords
Finite Element Analysis
Modulus of Rupture
Modulus of Elasticity
Poplar
Cathay
China
Language
English
Research Status
Complete
Series
Materials
ISSN
1996-1944
Summary
This paper presents the formulae and finite element analysis models for predicting the Modulus of Elastic (MOE) and Modulus of Rupture (MOR) of Cathay poplar finger-jointed glulam. The formula of the MOE predicts the MOE of Cathay poplar glulam glued with one-component polyurethane precisely. Three formulae are used to predict the MOR, and Equation (12) predicts the MOR of Cathay poplar glulam precisely. The finite element analysis simulation results of both the MOE and MOR are similar to the experimental results. The predicted results of the finite element analysis are shown to be more accurate than those of the formulae, because the finite element analysis considers the glue layers, but the formulae do not. Three types of typical failure modes due to bending were summarized. The bending properties of Cathay poplar glulam were compared to those of Douglas fir glulam. The results show that Cathay poplar glulam has a lower stiffness, but a marginally higher strength. One-component polyurethane adhesive is shown to be more effective than resorcinol formaldehyde resin adhesive for Cathay poplar glulam. This study shows that Cathay poplar has the potential to be a glulam material in China.
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The Applicability of I-214 Hybrid Poplar as Cross-Laminated Timber Raw Material

https://research.thinkwood.com/en/permalink/catalogue1132
Year of Publication
2015
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Markó, Gábor
Bejó, László
Takáts, Péter
Year of Publication
2015
Country of Publication
Hungary
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Poplar
Bending Test
Polyurethane
MOE
Low-Grade
Language
Hungarian
Research Status
Complete
Series
Faipar
ISSN
2064-9231
Summary
Cross-Laminated Timber (CLT) is a relatively new construction material that has not gained popularity in Hungary yet. Producing such building elements using Hungarian raw materials may help to establish this technique. The purpose of our research was to examine the possibility of producing CLT using Hungarian I-214 hybrid poplar. One three-layer panel was produced using Hungarian hybrid polar and polyurethane resin, and tested in bending. The MOR of the poplar CLT was found to be comparable to low-grade softwood CLT, but the MOE was lower than the requirement. Poplar raw material may be suitable for CLT production by selecting higher grade raw material using nondestructive testing, or as a secondary raw material mixed in with softwood.
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Structural Reliability Analysis of Cross Laminated Timber Plates Subjected to Bending

https://research.thinkwood.com/en/permalink/catalogue2713
Year of Publication
2020
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Vilela, Ramon
Mascia, Nilson
Santos, Luciano
Year of Publication
2020
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Bending
Structural Reliability
Monte Carlo Simulation
Failure Mode
Probability of Failure
Load Capacity
Four Point Bending Test
Language
English
Conference
Society of Wood Science and Technology International Convention
Research Status
Complete
Summary
Failure modes of Cross Laminated Timber (CLT) plates reach by an excess of tensile stress on finger joints, shear stress on transverse layer due to rolling shear effect and by natural vibration. The Probability of Failure (POF) of CLT plates can be estimated from the probability distribution of their ruptures and stiffnesses, as well as their correlation coefficients. In this context, the aim of this paper is to estimate the load capacity of Cross Laminated Timber plates from a specific probability of failure and the experimental results of mechanical and physical properties. For this purpose, CLT plates were manufactured with wood species of Pinus taeda L., from Brazilian reforestation plantations. Four-point bending tests were conducted to investigate the failure behavior of the CLT plates. Density and moisture content were obtained from small specimens extracted from these plates. Monte Carlo simulation was carried out to predict the probabilistic loads that produce the failure of CLT plates, considering the failure occasioned by natural vibration as well. Experimental and numerical results of the failure modes were compared and the maximum loads to an acceptable probability of failure of the several CLT lengths were estimated too.
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Numerical Analysis and Its Laboratory Verification in Bending Test of Glue Laminated Timber Pre-Cracked Beam

https://research.thinkwood.com/en/permalink/catalogue2426
Year of Publication
2019
Topic
Mechanical Properties
Design and Systems
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Kawecki, Bartosz
Podgórski, Jerzy
Publisher
MDPI
Year of Publication
2019
Country of Publication
Switzerland
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Mechanical Properties
Design and Systems
Keywords
Laboratory Tests
Damage
Finite Element Model
Pine
Softwood
Bonding
Language
English
Research Status
Complete
Series
Materials
Online Access
Free
Resource Link
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Numerical Analysis of Damage Evolution of 3D Timber-Steel Hybrid Beams in Bending

https://research.thinkwood.com/en/permalink/catalogue1695
Year of Publication
2016
Topic
Mechanical Properties
Material
Steel-Timber Composite
Application
Beams
Author
Khelifa, Mourad
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Steel-Timber Composite
Application
Beams
Topic
Mechanical Properties
Keywords
Damage
Bending Test
Finite Element
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4291-4298
Summary
The behaviour of timber-steel hybrid beams for buildings is very complex because of the combination of the two very different materials that are wood and steel. Numerical simulation of such behaviour requires an accurate description of orthotropic material’s behaviour with damage. This paper describes 3D-Finite Element (FE) simulation results obtained using an elasto-plastic model coupled with an isotropic ductile damage, and implemented into ABAQUS/Explicit FE software. After a short presentation of the constitutive equations and their related numerical aspects, the validation of the model was carried out by simulating timber-steel hybrid beams. Good agreement was found between FE and experimental results, showing the good capability of the model to predict the ductile damage evolution in bending test of timber-steel hybrid structures.
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Fire Resistance Tests on Cross-Laminated Timber Floor Panels: An Experimental and Numerical Analysis

https://research.thinkwood.com/en/permalink/catalogue153
Year of Publication
2013
Topic
Fire
Material
CLT (Cross-Laminated Timber)
Application
Floors

Strength and Stiffness of Cross Laminated Timber (CLT) Panels Produced with Pinus and Eucalyptus: Experimental and Analytical Comparisons

https://research.thinkwood.com/en/permalink/catalogue2453
Year of Publication
2019
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Pereira, Marcos Cesar de Moraes
Calil Junior, Carlito
Publisher
SciELO
Year of Publication
2019
Country of Publication
Brazil
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Strength
Stiffness
Language
English
Research Status
Complete
Series
Matéria (Rio J.)
ISSN
1517-7076
Online Access
Free
Resource Link
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Experimental and Numerical Analysis of Flexible Polymer Connections for CLT Buildings

https://research.thinkwood.com/en/permalink/catalogue2057
Year of Publication
2018
Topic
Connections
Mechanical Properties
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems

Bending and Bonding Properties of Mixed-Species Glued Laminated Timber from Merpauh, Jelutong and Sesendok

https://research.thinkwood.com/en/permalink/catalogue2434
Year of Publication
2019
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Wood Building Systems

An Innovative Connection System for CLT Structures: Experimental - Numerical Analysis

https://research.thinkwood.com/en/permalink/catalogue460
Year of Publication
2014
Topic
Connections
Material
CLT (Cross-Laminated Timber)
Author
Polastri, Andrea
Angeli, Albino
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Connections
Keywords
Prefabrication
Self-Tapping Screws
X-RAD
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The paper describes experimental and numerical analyses on a completely new connection system developed for CLT (Cross Laminated Timber) constructions. The innovative solution herein proposed, named X-RAD, consists of a point-to-point mechanical connection system, fixed to the corners of the CLT panels. This connection, that is designed to be prefabricated, is made of a metal wrapping and an inner hard wood element which are fastened to the panel by means of allthreaded self-tapping screws. Such system permits to reduce significantly the number of bolts/fasteners required to assemble two or more panels together or to connect them to the foundation. This results in the enhancement of the installation process in terms of speed, quality and safety. One of the reasons that fuelled the development of the presented system, is the desire of offering a solution to those issues (e.g. to satisfy ductility and energetic dissipation requirements) commonly related to the seismic safety of timber structures. In other words there was the will of defining a system able to guarantee an adequate level of ductility and energetic dissipation.
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Free
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10 records – page 1 of 1.