Strengthening of timber structures with glued-in rods

Published Date
30 October 2015, Vol.97:90–105, doi:10.1016/j.conbuildmat.2015.03.097
Special Issue: Reinforcement of Timber Structures

Author 

René Steiger ^a,,,www 

Erik Serrano ^b,1,,www 

Mislav Stepinac ^c,2,,www 

Vlatka Rajčić ^c,3,,www 

Caoimhe O’Neill ^d,4,,www 

Daniel McPolin ^d,5,,www 

Robert Widmann ^a,6,,www

• aEmpa, Swiss Federal Laboratories for Materials Science and Technology, Structural Engineering Research Laboratory, Ueberlandstrasse 129, CH-8600 Dübendorf, Switzerland
• bDivision of Structural Mechanics, Faculty of Engineering LTH, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden
• cDepartment of Structures, Faculty of Civil Engineering, University of Zagreb, Kaciceva 26, 10 000 Zagreb, Croatia
• dCivil Engineering Research Centre, Queen’s University, Belfast University Road, Belfast BT9 5AG, Northern Ireland, United Kingdom

Received 28 January 2015. Revised 17 March 2015. Accepted 23 March 2015. Available online 20 April 2015.

Highlights

• Glued-in rods (GiR) connections/reinforcement to be regarded as systems.
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  System parts: timber, rod, adhesive, geometry, setting procedure, quality control.
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  Ductile failure modes in GiR to be preferred.
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  Few technical approvals for specific products available.
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  Limited number of design rules in actual and former design codes available.

Abstract 

The research and development of connecting and strengthening timber structural elements with glued-in rods (GiR) has been ongoing since the 1980s. Despite many successful applications in practice, agreement regarding design criteria has not been reached. This state-of-the-art review summarises results from both research and practical applications regarding connections and reinforcement with GiR. The review considers manufacturing methods, mechanisms and parameters governing the performance and strength of GiR, theoretical approaches to estimate their load-bearing capacity and existing design recommendations.

Keywords

Reinforcement

Steel rod

FRP rod

Design

Application

Adhesive

Eurocode 5

Quality control

Linear elastic fracture mechanics

Non-linear elastic fracture mechanics

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  Corresponding author. Tel.: +41 58 765 42 15.
  
  

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