Experimental and numerical investigations of laminated veneer lumber panels

• Autorzy: Chybiński Marcin , Polus Łukasz

Identyfikatory

DOI

10.24425/ace.2021.138060

Warianty tytułu

PL

Badania eksperymentalne i numeryczne paneli z drewna klejonego warstwowo z fornirów

• Języki publikacji: EN

Abstrakty

EN

This paper presents a study of laminated veneer lumber panels subjected to bending. Laminated veneer lumber (LVL) is a sustainable building material manufactured by laminating 3-4-mm-thick wood veneers, using adhesives. The authors of this article studied the behaviour of type R laminated veneer lumber (LVL R), in which all veneers are glued together longitudinally - along the grain. Tensile, compressive and bending tests of LVL R were conducted. The short-term behaviour, load carrying-capacity, mode of failure and load-deflection of the LVL R panels were investigated. The authors observed failure modes at the collapse load, associated with the delamination and cracking of veneer layers in the tensile zone. What is more, two non-linear finite element models of the tested LVL R panel were developed and verified against the experimental results. In the 3D finite element model, LVL R was described as an elastic-perfectly plastic material. In the 2D finite element model, on the other hand, it was described as an orthotropic material and its failure was captured using the Hashin damage model. The comparison of the numerical and experimental analyses demonstrated that the adopted numerical models yielded the results similar to the experimental results.

PL

W pracy przedstawiono wyniki badań zginanych paneli wykonanych z drewna klejonego warstwowo z fornirów (LVL). Materiał zgodny z ideą zrównoważonego budownictwa powstaje przez połączenie 3-4 mm fornirów za pomocą kleju. Autorzy badali zachowanie drewna klejonego warstwowo z fornirów, w którym wszystkie forniry są sklejone wzdłużnie - wzdłuż włókien (LVL R). Wyznaczono wytrzymałość materiału LVL R na rozciąganie, ściskanie i zginanie. Określono zachowanie, nośność, formę zniszczenia paneli LVL R oraz zależność siła-przemieszczenie. Autorzy zaobserwowali formę zniszczenia paneli związaną z rozwarstwianiem warstw materiału oraz z pękaniem fornirów w rozciąganej strefie panelu. Przygotowano dwa modele numeryczne panelu LVL R i porównano ich zachowanie z laboratoryjną próbą zginania. W trójwymiarowym modelu numerycznym, zachowanie LVL R opisano za pomocą modelu sprężysto-idealnie plastycznego. W dwuwymiarowym modelu numerycznym materiał LVL R opisano, wykorzystując model ortotropowy a jego zniszczenie uwzględniono, biorąc po uwagę kryterium Hashin’a. Wyniki otrzymane z analiz numerycznych były zbliżone do rezultatów badań.

Słowa kluczowe

EN

glued laminated timber; laminated veneer lumber; LVL; finite element analysis; FEM; wood product; timber structure; composite structure; Hashin damage model

PL

drewno klejone warstwowo; fornir; LVL; metoda elementów skończonych; MES; wyrób drewniany; konstrukcja drewniana; konstrukcja zespolona; kryterium Hashina

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2021
• Tom: Vol. 67, nr 3
• Strony: 351--372
• Opis fizyczny: Bibliogr. 74 poz., il., tab.

Twórcy

autor

Chybiński Marcin

• University of Technology, Faculty of Civil and Transport Engineering, Poznan, Poland

• https://orcid.org/0000-0003-2539-7764

autor

Polus Łukasz

• Poznan University of Technology, Faculty of Civil and Transport Engineering, Poznan, Poland

• https://orcid.org/0000-0002-1005-9239

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