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Durable Timber Bridges - Final Report and Guidelines

https://research.thinkwood.com/en/permalink/catalogue2133
Year of Publication
2017
Topic
Design and Systems
Moisture
Serviceability
Material
Glulam (Glue-Laminated Timber)
Application
Bridges and Spans

Effect of Moisture Induced Stresses on the Mechanical Performance of Glulam Beams of Vihantasalmi Bridge

https://research.thinkwood.com/en/permalink/catalogue1609
Year of Publication
2016
Topic
Moisture
Serviceability
Material
Glulam (Glue-Laminated Timber)
Application
Bridges and Spans
Author
Hradil, Petr
Fortino, Stefania
Salokangas, Lauri
Musci, Alessandro
Metelli, Giovanni
Year of Publication
2016
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Bridges and Spans
Topic
Moisture
Serviceability
Keywords
Moisture Induced Stresses
Finland
Moisture Gradients
Moisture Content
Hygrothermal
Multi-Fickian Theory
Relative Humidity
Temperature
Eurocode 5
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 2159-2167
Summary
The present paper deals with the effect of moisture induced stresses (MIS) on the mechanical performance of a glulam beam of Vihantasalmi Bridge in Finland. MIS caused by high moisture gradients in a cross section of the glulam beam are calculated by a hygro-thermal multi-Fickian model for evaluation of moisture content, relative humidity and temperature in wood that is sequentially coupled with an orthotropic-viscoelasticmechanosorptive model for calculation of wood stresses. Both models, already developed in Abaqus FEM code by some of the authors in their previous works, had to be modified for the Nordic climate. The obtained levels of MIS are then compared to the Eurocode 5 design resistances. The study aims at providing suggestions to future developments of Eurocode 5 for the correct evaluation of the influence of moisture content on service life in timber bridge elements.
Online Access
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Moisture-Induced Stresses in Large Glulam Beams. Case Study: Vihantasalmi Bridge

https://research.thinkwood.com/en/permalink/catalogue2468
Year of Publication
2019
Topic
Moisture
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Bridges and Spans

Numerical Modelling of the Hygro-Thermal Response of Timber Bridges During their Service Life: A Monitoring Case-Study

https://research.thinkwood.com/en/permalink/catalogue2167
Year of Publication
2013
Topic
Serviceability
Moisture
Application
Bridges and Spans
Author
Fortino, Stefania
Genoese, Alessandra
Genoese, Andrea
Nunes, Lina
Palma, Pedro
Organization
VTT Technical Research Centre of Finland
University of Calabria
Universidade dos Açores
Publisher
Elsevier
Year of Publication
2013
Format
Journal Article
Application
Bridges and Spans
Topic
Serviceability
Moisture
Keywords
Bridge
Variable Environment
Monitoring Techniques
Moisture Induced Stress
Multi-Fickian Theory
Finite Element Method
Abaqus Code
Research Status
Complete
Series
Construction and Building Materials
Summary
The monitoring of timber bridges during their service life is important for the maintenance plans of these structures. Numerical modelling can integrate the monitoring techniques by reducing the needed inspections and the maintenance costs. In this paper a 3D computational model based on a well assessed multi-Fickian theory is implemented in Abaqus FEM code. The hygro-thermal response of a timber pedestrian bridge is simulated during a period of its service life. The numerical results are in agreement with measurements taken by a sensor-based technique. Conclusions are given on the moisture gradients which could generate the so-called moisture induced stresses (MIS).
Online Access
Payment Required
Resource Link
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