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Stress-Laminated Timber Decks Subjected to Eccentric Loads in the Ultimate Limit State

Kristoffer Ekholm (Institutionen för bygg- och miljöteknik, Konstruktionsteknik) ; R. Crocetti ; Robert Kliger (Institutionen för bygg- och miljöteknik, Konstruktionsteknik)
Journal of Bridge Engineering (1084-0702). Vol. 18 (2013), 5, p. 409-416.
[Artikel, refereegranskad vetenskaplig]

Stress-laminated timber (SLT) bridge decks are generally designed using either linear hand calculation methods or linear finite-element models. Several studies have shown, however, that the behavior of SLT decks is nonlinear when loaded until failure. In this paper, several linear design methods are compared with one another and with an ultimate load test of a full-scale SLT deck subjected to an eccentric load. Some of the linear hand calculation methods show significant discrepancies in results, depending on the load position. There are also variations in the results from finite-element models, depending on the material properties assigned to the deck. All the design methods failed to predict the deflection of the tested deck when loaded to failure. A larger deflection was observed in the full-scale test than that predicted by the design methods. As a result, the linear design method could underestimate the bending stresses in the deck. Several hand calculation methods are also unable to calculate the transverse forces and moments necessary for design according to Eurocode 5.

Nyckelord: Stress-laminated timber deck, Ultimate limit state modeling, Timber bridges, Eccentric plate loads, behavior, bridges

Denna post skapades 2013-05-16.
CPL Pubid: 177003


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Institutioner (Chalmers)

Institutionen för bygg- och miljöteknik, Konstruktionsteknik



Chalmers infrastruktur

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Performance of Stress-Laminated-Timber Bridge Decks