Bending Stiffness of Stress‐Laminated Timber Decks with Butt Joints
Publication: Journal of Structural Engineering
Volume 119, Issue 5
Abstract
Stress‐laminated timber bridge decks consist of lumber assemblies transversely posttensioned with high‐strength steel bars. The lumber components contain end‐to‐end butt joints to span the length of the bridge. At any cross section of the bridge, the joints are placed in a regular pattern, with one butt joint in a group of three to five laminae. The presence of butt joints in a bridge deck reduces its longitudinal bending stiffness. Since stress‐laminated timber bridge decks are modeled as orthotropic plates, the actual system stiffness properties are needed in the analysis. This paper presents an analytical‐experimental study to verify existing bending stiffness reduction factors for decks with regular butt‐joint patterns. Forty northern red oak and hickory stress‐laminated beams with three butt joint patterns and subjected to three transverse stress levels are tested in bending, and the experimental responses are correlated with existing theoretical predictions using linear regression analysis. Design recommendations are presented.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 119 • Issue 5 • May 1993
Pages: 1670 - 1676
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Oct 15, 1992
Published online: May 1, 1993
Published in print: May 1993
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