Bending properties of mechanically jointed solid timber beams

• Autorzy: Supe P. , Iejavs J.

Identyfikatory

DOI

10.12841/wood.1644-3985.152.11

• Języki publikacji: EN

Abstrakty

EN

The aim of this work is the study of the load bearing capacity of two solid timber beams mechanically jointed by fully threaded timber screws. The obtained results are compared with the load bearing capacity of a glulam beam with the same dimensions. A four-point bending test according to LVS EN 408+A1:2012 points 9, 10 and 19 is performed to determine the modulus of elasticity and the bending strength. The test results are compared to analytical calculations according to Eurocode 5 requirements. The aim is achieved by comparing the characteristics of both beams. The main difference between mechanically jointed solid timber beam and a glulam beam is that joint of the beams reduces the modulus of elasticity while still providing good bending strength.

Słowa kluczowe

EN

mechanically jointed beams; solid timber; bending properties

• Wydawca: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
• Czasopismo: Drewno : prace naukowe, doniesienia, komunikaty
• Rocznik: 2017
• Tom: vol. 60, nr 199
• Strony: 151--159
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Supe P.

• Riga Technical University, Riga, Latvia

autor

Iejavs J.

• Forest and Wood Products Research and Development Institute, Jelgava, Latvia

Bibliografia

• Bejtka I., Blaß H.J. [2002]: Joints with inclined screws. Proceedings of: meeting thirty-five of the international council for building research studies and documentation, CIB, Working Commission W18 – Timber Structure, September 2002. Kyoto, Japan
• Blaß H.J., Bejtka I. [2001]: Screws with continuous threads in timber connections. RILEM, Proceedings PRO 22, Stuttgart: 163-172
• Branco J., Kekeliak M., Lourenço P. [2014]: In-plane stiffness of traditional timber floors strengthened with CLT. In: Materials and Joints in Timber Structures: Recent Developments of Technology. S. Aicher, H.-W. Reinhardt, H. Garrecht (ed.). Dordrecht, Heidelberg, New York, London: Springer: 725-737
• ETA-Danmark A/S. [2011, May 4]. European Technical Approval ETA-11/0030. 8
• Forest Products Laboratory [2010]. R.J. Ross (ed.). Wood handbook – Wood as an engineering material. Forest Products Laboratory, Centennial Edition, Madison, p. 509
• Kevarinmäki A. [2002]: Joints with inclined screws. Proceedings of: meeting thirty-five of the international council for building research studies and documentation, CIB, Working Commission W18 – Timber Structure, September 2002. Kyoto, Japan
• O’Loinsigh C., Oudjene M., Ait-Aider H., Fanning P., Pizzi A., Shotton E., Meghlat E. [2012]: Experimental study of timber-to-timber composite beam using welded – through wood dowels. Construction and Building Materials 36: 245-250
• Puettmann M., Wilson J. [2005]: Gate-to-gate life-cycle inventory of glued-laminated timber production. Wood and Fiber Science 37: 99-113
• Ridley-Ellis D., Moore J., Khokhar A. [2009]: Random acts of elasticity: MoE, G and EN408. WG meetings COST Action E53 “Quality Control for Wood and Wood Products” and Wood Drying Seminar in Bled, Slovenia, [online] [accessed on 07.08.2014.]. Available: http://researchrepository.napier.ac.uk/2520/1/Cost_e53_ridleyellis_et_al_updated.pdf
• Tomasi R., Crosatti A., Piazza M. [2010]: Theoretical and experimental analysis of timber-to-timber joints connected with inclined screws. Construction and Building Materials 24: 1560-1571
• List of standards
• LVS EN 14358:2007. Koka būvkonstrukcijas. 5 procentīļu raksturvērtību aprēķins un paraugkopas pieņemamības kritēriji (Timber structures – Calculation of characteristic 5-percentile values and acceptance criteria for a sample)
• LVS EN 408+A1:2012. Koka konstrukcijas. Konstrukciju kokmateriāli un kārtām salīmēti kokmateriāli. Dažu fizikālo un mehānisko īpašību noteikšana (Timber structures – Structural timber and glued laminated timber – Determination of some physical and mechanical properties)
• LVS EN 1995-1-1+AC+A1:2012. 5. Eirokodekss. Koka konstrukciju projektēšana. 1-1. daļa: Vispārīgi. Vispārīgie noteikumi un noteikumi būvēm (Eurocode 5 – Design of timber structures - Part 1-1: General – Common rules and rules for buildings)
• LVS EN 14080:2013. Koka konstrukcijas. Līmēti kokmateriāli. Prasības (Timber structures – Glued laminated timber and glued solid timber – Requirements)
• LVS EN 338:2014. Konstrukciju kokmateriāli. Stiprības klases (Structural timber – Strength classes)