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Non-linear analysis of two-layer timber beams considering interlayer slip and uplift
Kroflič, Aleš (Avtor), Planinc, Igor (Avtor), Saje, Miran (Avtor), Turk, Goran (Avtor), Čas, Bojan (Avtor)

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Izvleček
A new mathematical model and its finite element formulation for the non-linear analysis of mechanical behaviour of a two-layer timber planar beam is presented. A modified principle of virtual work is employed in formulating the finite element method. The basic unknowns are strains. The following assumptions are adopted in the mathematical model: materials are taken to be non-linear and can differ from layer to layer; interacting shear and normal contact tractions between layers are derived from the non-linear shear contact traction-slip and the non-linear normal contact traction-uplift characteristics of the connectors; the geometrically linear and materially non-linear Bernoulli's beam theory is assumed for each layer. The formulation is found to be accurate, reliable and computationally effective. The suitability of the theory is validated by the comparison of the numerical solution and the experimental results of full-scale laboratory tests on a simply supported beam. An excellent agreement between measured and calculated results is observed for all load levels. The further objective of the paper is the analysis of the effect of different normal contact traction-uplift constitutive relationships on the kinematic and static quantities in a statically determined and undetermined structure. While the shear contact traction-slip constitutive relationship dictates the deformability of the composite beam and has a substantial influence on most of the static and kinematic quantities of the composite beam, a variable normal contact traction-uplift constitutive relationship is in most cases negligible.

Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FGG - Fakulteta za gradbeništvo in geodezijo
Leto izida:2010
Založnik:Elsevier
Št. strani:str. 1617-1630
Številčenje:Letn. 32, št. 6
UDK:624.011.1:624.072.2
ISSN pri članku:0141-0296
DOI:10.1016/j.engstruct.2010.02.009 Povezava se odpre v novem oknu
COBISS.SI-ID:4917089 Povezava se odpre v novem oknu
Število ogledov:400
Število prenosov:88
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Gradivo je del revije

Naslov:Engineering structures
Skrajšan naslov:Eng. struct.
Založnik:Elsevier Science
ISSN:0141-0296
COBISS.SI-ID:7750666 Novo okno

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:gradbeništvo, lesene konstrukcije

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