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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: Concrete Bridge Articulation
Author(s): H. B. Day
Publication: Special Publication
Appears on pages(s): 55-76
Keywords: bridge bearings; bridge piers; bridges (structures); elastic analysis; loads (forces); plastics, polymers and resins; stiffness; structural analysis; structural design; substructures; superstructures.
Abstract:This paper demonstrates to bridge designers the advantages of matching bearing stiffness to pier stiffness to achieve economic load sharing of longitudinal loads on concrete bridges. The paper discusses the types of bearings and their limitations for articulation, bridge movements and horizontal loads, and sets out the design process for a bridge supported and restrained by elastomeric bearings only -- an elastically restrained structure. An example of the calculations at a typical pier is given. The following articulation systems for a continuous bridge example are analysed, the results tabulated and compared: pinned and sliding, tmnolithic and elastomeric, pinned and elastomeric, all elastomeric bearings The following articulation systems for a simply supported bridge example are analysed, the results tabulated and compared: pinned and sliding, pinned and elastomeric, all elastomeric bearings. The paper concludes that matching bearing stiffness to pier stiffness produces cost savings; that elastomeric bearings are superior for this purpose, that elastically restrained bridges give the best load sharing amongst piers and that load sharing can be improved with sliding bearings by varying the coefficient of friction.
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