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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: From Past Achievements to New Challenges for Joints and Bearings
Author(s): Fritz Leonhardt
Publication: Special Publication
Appears on pages(s): 735-760
Keywords: bearings; bridge decks; bridges (structures); control joints; costs; durability; hinges (structural ); history; joints (junctions); maintenance; neoprene; performance; reviews; rubber; structural design; structures; tetrafluoroethylene resins.
Abstract:The history of the first use of neoprene and teflon for sealed expansion joints and pot bearings is given. Experience teaches that joints and bearings are often causes for the need for maintenance. Therefore, the challenge for the further development must be to improve durability and facilitate inspection and maintenance. For expansion joints, the first rule is to reduce their number by continuity of bridge decks and other structures over large lengths. The second rule is to improve materials and all structural details towards more durability and to apply sufficient safety factors for all dimensions. The influence of temperature effects, differential settlement and imperfections must be given greater consideration. Suitable design details must be provided to permit the replacement of bearings. The presentation includes some recent European examples of joints and bearings which attempt to satisfy these requirements.
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