00459588

Component

http://onlinepubs.trb.org...trr/1986/1053/1053-005.pdf

https://scholar.google.co...ders&publication_year=1986

In recent years, changes in the load distribution criteria for highway bridges have been limited primarily to steel and concrete bridges, and only a few changes have occurred in timber bridge criteria. Several years ago, the AASHTO Bridge Committee approved the inclusion of criteria for glued-laminated stringer bridges. However, the glued-laminated, longitudinal, timber-deck bridge developed in recent years has been subject to code specifications that do not reflect the favorable load distribution characteristics of the bridge. Sufficient test data now exist to verify the distribution behavior. The purpose of this study was to develop criteria that more accurately represent the bridge behavior. The study was conducted in three phases. Phase One was a literature review of both analytical and experimental investigations of load distribution in timber-deck bridges. Phase Two analytically investigated the distribution characteristics of a broad range of glued-laminated, longitudinal, timber-deck bridges. The analytical procedure used was verified by comparison of theoretical results with results from actual field tests. In Phase Three, criteria for inclusion in the appropriate sections of the AASHTO Bridge Specifications were developed and have been approved by the AASHTO Bridge Committee. The new criteria more adequately reflect the load distribution of the longitudinal deck bridge.

Publication of this paper sponsored by Committee on Low-Volume Roads. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01419458

pp 31-40

1986

Transportation Research Record

030903969X

Print

Figures (7) ; References (11) ; Tables (7)

Bridge decks; Gluing; Laminated wood; Load transfer; Specifications; Timber construction; Wooden bridges

Criteria; Longitudinal

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls

TRIS, TRB

Nov 30 1986 12:00AM

• A PREFABRICATED MODULAR TIMBER BRIDGE
• AN OVERVIEW OF TIMBER BRIDGES
• DESIGNING TIMBER BRIDGES FOR LONG LIFE
• LATERAL STABILITY CONSIDERATIONS OF TIMBER BEAMS IN OLD BRIDGES
• NEW IDEAS FOR TIMBER BRIDGES
• OHIO'S EXPERIENCES WITH TREATED TIMBER FOR BRIDGE CONSTRUCTION
• PERFORMANCE AND REHABILITATION OF TIMBER BRIDGES
• PROBABILISTIC ASSESSMENT OF THE FAILURE OF LAMINATED TIMBER BRIDGES
• REPAIR OF TIMBER BRIDGE PILING BY POSTING AND EPOXY GROUTING
• ULTIMATE STRENGTH OF TIMBER-DECK BRIDGES