Friction in Bridge Bearings with Contaminated TFE Slide Surface
Publication: Journal of Structural Engineering
Volume 119, Issue 11
Abstract
Tetrafluoroethylene (TFE) is commonly used as a slide surface mating with polished stainless steel in bridge bearings that accommodate translation and rotation of the superstructure relative to the substructure. The primary requirement of the slide surface is a low coefficient of friction that is maintained throughout the service life of the bearing. The paper reports on a laboratory investigation comprising 14 tests undertaken at room temperature under simulated field conditions that was performed to determine the effect of contamination on the coefficient of friction in a lubricated TFE/stainless steel interface. It is shown that the friction of a lubricated surface increases significantly with a relatively low amount of contamination in the form of unhydrated portland cement in the interface, emphasizing the need for assembling bearings in a dust‐free environment and avoiding disassembling of bearings on site. The influences of the degree of contamination on the coefficient of friction at initial movement and after 200 cycles of movement, as well as on the peak value of the coefficient of friction recorded during a test, are discussed.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 119 • Issue 11 • November 1993
Pages: 3169 - 3177
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Sep 14, 1992
Published online: Nov 1, 1993
Published in print: Nov 1993
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