00378783

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http://onlinepubs.trb.org...s/trr/1983/903/903-011.pdf

https://scholar.google.co...rray&publication_year=1983

A study to determine experimentally the effective coefficient of friction of four classes of steel bridge bearings used by the Oklahoma Department of Transportation is reported. As-built, rusted, and in situ (debris at the moving surfaces) conditions were tested by using full-scale bearings under normal loads to 250,000 lb. In addition, the effects of manufacturing tolerances on bearing performance were analyzed. From the tests it was found that unturned pipe rollers exhibit the lowest effective coefficient of friction of the four rolling devices tested. For turned pipe rollers it was found that the equivalent coefficient of friction is a function of the amount of horizontal movement from the centerline. A geometric explanation was devised, and excellent agreement between predicted and measured results was achieved. Tests with a pintle rocker showed that fabrication inaccuracies, especially in the sole plate socket radius, can significantly affect the performance and effective coefficient of friction of the bearing. In all cases, tests with rusted bearing plates or with sand spread over the lower bearing plate showed significant increases in the effective coefficient of friction. (Author)

Publication of this paper sponsored by Committee on General Structures. 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

01418812

pp 79-86

1983

Transportation Research Record

62nd Annual Meeting of the Transportation Research Board

0309035171

Print

Figures (13) ; References (9) ; Tables (1)

Bridge bearings; Coefficient of friction; Engineering tolerance; Metal bridges; Pipe; Rollers; Standards; Steel bridges

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

TRIS, TRB

Nov 30 1983 12:00AM

• ABNORMAL ROTATIONS OF SKEWED AND CURVED BRIDGES
• BEHAVIOR OF ABUTMENT PILES IN AN INTEGRAL ABUTMENT IN RESPONSE TO BRIDGE MOVEMENTS
• CALTRANS PRESTRESSED CONCRETE PIPE CULVERT RESEARCH: DESIGN SUMMARY AND IMPLEMENTATION
• COMPUTER MODELING OF THE CROSS CANYON CULVERT
• Effect of Heavy Loads on Buried Corrugated Polyethylene Pipe
• FIELD TESTING OF THE FREMONT BRIDGE
• FULL-DEPTH MODULAR PRECAST, PRESTRESSED BRIDGE DECKS
• LOAD FACTOR DESIGN APPLIED TO TRUSS MEMBERS IN DESIGN OF GREATER NEW ORLEANS BRIDGE NO. 2
• OBSERVATIONS OF HIGHWAY BRIDGE MOVEMENTS AND THEIR EFFECTS ON JOINTS AND BEARINGS
• PERFORMANCE OF FULL-SPAN PANEL-FORM BRIDGES UNDER REPETITIVE LOADING
• Seismic Design of Curved Box Girders
• SKEWED BRIDGES WITH INTEGRAL ABUTMENTS
• STUDY OF CRACKING OF COMPOSITE DECK BRIDGE ON I-75 OVER PEACE RIVER
• TEST TO FAILURE OF THE HANNACROIX CREEK BRIDGE
• TESTING AND DESIGN OF LONGITUDINAL REINFORCEMENT FOR CANTILEVERED BRIDGE PIERS