Post-Tensioned LVL Beams: Experimental Results and Numerical Modelling

https://research.thinkwood.com/en/permalink/catalogue1713
Year of Publication
2016
Topic
Serviceability
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)
Application
Beams
Author
Granello, Gabriele
Giorgini, Simona
Palermo, Alessandro
Pampanin, Stefano
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Application
Beams
Topic
Serviceability
Mechanical Properties
Keywords
Post-Tensioned
Monitoring
Creep
Deflection
Finite Element
Numerical Modelling
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4520-4528
Summary
The benefits of longitudinally post-tensioning in timber beams has been highlighted in several laboratory tests carried out at the University of Canterbury. However, there is still some concern about the long-term behaviour of post-tensioned engineered wood, which relates in particular to the amount of possible post-tensioning loss due to creep effects inside compressed members. For this reason, research has been conducted at the University of Canterbury including both experimental and numerical work on post-tensioned members. In the first part of this paper, the experimental results relative to four years of monitoring of post-tensioned LVL beam specimens with different tendon profiles are presented. In the second part, a coupled finite difference-finite element procedure is proposed to numerically simulate the beams behaviour. Results are then critically discussed, in particular concerning the amount of post-tensioning losses as well as creep deformations on the beams deflection.
Online Access
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Resource Link
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