Stress-Laminated Timber Decks Subjected to Eccentric Loads in the Ultimate Limit State
Journal article, 2013

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.

Eccentric plate loads

Ultimate limit state modeling

bridges

Timber bridges

behavior

Stress-laminated timber deck

Author

Kristoffer K J Ekholm

Chalmers, Civil and Environmental Engineering, Structural Engineering

R. Crocetti

Lund University

Robert Kliger

Chalmers, Civil and Environmental Engineering, Structural Engineering

Journal of Bridge Engineering

1084-0702 (ISSN)

Vol. 18 5 409-416

Subject Categories

Mechanical Engineering

Materials Engineering

DOI

10.1061/(ASCE)BE.1943-5592.0000375