Weakened zones in wood – based composite beams and their strengthening by CFRP: experimental, theoretical, and numerical analysis

• Autorzy: Kula Krzysztof , Socha Tomasz , Denisiewicz Arkadiusz

Identyfikatory

DOI

10.24423/EngTrans.874.20190712

• Języki publikacji: EN

Abstrakty

EN

This paper looks at the mechanical behaviour of wood-based beams. Laboratory tests of an I-beam show a considerable decrease of capacity in the weakened zones, e.g., at the connection between two pieces of pine wood used as a flange. We propose strengthening of the zones using fibre composite tapes based on CFRP. This article demonstrates the way for protection of the I-beam with defects in the bottom flange against the loss of load-carrying capacity. The required anchor length is determined by an analytical method formulated in the paper. The numerical results are presented. The full adhesion between CRFP and wood is assumed in the numerical simulations.

Słowa kluczowe

EN

wood based composite beam; strengthening; CFRP; FEM; laboratory tests

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2019
• Tom: Vol. 67, iss. 4
• Strony: 461--474
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr.

Twórcy

autor

Kula Krzysztof

• Division of Structural Mechanics University of Zielona Góra prof. Z. Szafrana 1, 65-246 Zielona Góra, Poland

autor

Socha Tomasz

• Division of Structural Mechanics University of Zielona Góra prof. Z. Szafrana 1, 65-246 Zielona Góra, Poland

autor

Denisiewicz Arkadiusz

Bibliografia

• 1. Burawska I., Zbieć M., Tomusiak A., Beer P., Local reinforcement of timber with composite and lignocellulosic materials, BioResources, 10(1): 457–468, 2015.
• 2. Documentation of the program ABAQUS v.6.14-5.
• 3. European Organisation for Technical Approvals, Test methods for light composite woodbased beams and columns, TR 002 Ed., October, 2000.
• 4. Godzimirski J., Strength of structural adhesive joints [in Polish: Wytrzymałość doraźna konstrukcyjnych połączeń klejowych], WNT, Warszawa, 2002.
• 5. Jasieńko J., Glue and engineering connections in the repair, maintenance and reinforcement of historic wooden structures [in Polish: Połączenia klejowe i inżynierskie w naprawie, konserwacji i wzmacnianiu zabytkowych konstrukcji drewnianych], DWE, Wrocław, 2003.
• 6. de Jesus A.M.P., Pinto J.M.T., Morais J.J.L., Analysis of solid wood beams strengthened with CFRP laminates of distinct lengths, Construction and Building Materials, 35: 817–828, 2012, doi: 10.1016/j.conbuildmat.2012.04.124.
• 7. Khelifa M., Celzard A., Numerical analysis of flexural strengthening of timber beams reinforced with CFRP strips, Composite Structures, 111: 393–400, 2014, doi: 10.1016/j.compstruct.2014.01.011.
• 8. Khelifa M., Celzard A., Oudjene M., Ruelle J., Experimental and numerical analysis of CFRP-strengthened finger-jointed timber beams, International Journal of Adhesion and Adhesives, 68: 283–297, 2016, doi: 10.1016/j.ijadhadh.2016.04.007.
• 9. Kula K., Schlebusch R., Kuczma M., Zastrau B., On the delamination problem in fiber reinforced shells, [in:] Cz. Woźniak, M. Kuczma, R. Świtka, K. Wilmański [Eds], Advances in the mechanics of inhomogeneous media, University of Zielona Góra, pp. 311– 321, 2010.
• 10. Lis Z., Rapp P., Restoration of the load-bearing capacity of the weakened tensile zone in wooden beams with the use of carbon fiber tapes [in Polish:Odtworzenie nośności osłabionej strefy rozciąganej w belkach drewnianych za pomocą taśm z włókien węglowych], [in:] 5th Scientific Conference Wood and Timber Derived Materials in Building Constructions – Papers, Szczecin, May 17–18, 2002, University Publisher of the Szczecin University of Technology, pp. 221–228, 2002.
• 11. Łagoda M., Strengthening of bridge structures with composite materials [in Polish: Wzmacnianie konstrukcji mostowych materiałami kompozytowymi], PAN, Warszawa, 2012.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).