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A Hysteresis model for timber joints with dowel-type fasteners

Izzi, Matteo and Rinaldin, Giovanni and Polastri, Andrea and Fragiacomo, Massimo (2018) A Hysteresis model for timber joints with dowel-type fasteners. Engineering Structures, Vol. 157 , p. 170-178. ISSN 0141-0296. Article.

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DOI: 10.1016/j.engstruct.2017.12.011

Abstract

Predicting the mechanical behaviour and the failure mechanism of timber joints with dowel-type fasteners requires consideration of several factors, including the geometrical and mechanical properties of the metal fastener, the physical properties of timber and the interaction between such elements. This paper proposes a numerical model where a joint is schematized as an elasto-plastic beam in a non-linear medium with a compression-only behaviour. Unlike the differential approach adopted by most of the hysteresis models published in literature, this model predicts the load-displacement response using simple mechanical relationships and basic input parameters. Furthermore, the model is capable of reproducing the effect of the cavity formed around the fastener by timber crushing, and simulates the hysteretic behaviour and the energy dissipation under cyclic conditions. Shear tests are reproduced on nailed steel-to-timber joints in Cross-Laminated Timber and results are compared to the experimental test data obtained on similar single fastener joints. Simulations lead to accurate predictions of both the mechanical behaviour (initial stiffness, maximum load-carrying capacity, global shape of the loading curve and of the hysteresis cycles) and the total energy dissipation observed in the tests.

Item Type:Article
ID Code:11925
Status:Published
Refereed:Yes
Uncontrolled Keywords:Cross-laminated timber, annular-ringed shank nail, steel-to-timber joint, non-linear modelling, hysteretic behaviour
Subjects:Area 08 - Ingegneria civile e Architettura > ICAR/09 Tecnica delle costruzioni
Area 08 - Ingegneria civile e Architettura > ICAR/09 Tecnica delle costruzioni
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Architettura, Design e Urbanistica
Publisher:Pergamon / Elsevier
ISSN:0141-0296
Deposited On:07 Feb 2018 10:29

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