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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: Development of a Precast Prestressed Concrete Railway Bridge Tie
Author(s): T. I. Campbell and M. S. Mirza
Publication: Special Publication
Appears on pages(s): 313-328
Keywords: loads (forces); mathematical models; precast concrete;
prestressed concrete; railroad bridges; railroad ties; research;
static loads; tests
Abstract:A research and development program on prestressed concrete ties for use on open deck railway bridge systems is described. This program involved the design and fabrication of prototype ties, studies of load distribution of a static wheel load among the ties, both by mathematical modelling and laboratory tests on a full-scale bridge system, determination of the strength of individual ties under static and repeated loadings, field testing of bridge systems in service, and a laboratory study of dynamic load distribution in the bridge system. It is shown that three parameters have a significant influence on the distribution of static wheel loads among the ties and that a linear relationship exists between the load taken by a tie and the tie spacing. Laboratory testing for static load distribution showed good correlation with an analyical model, while tests on individual ties indicated adequate strength under static and repeated loadings. Field tests, which are being conducted to determine the loading on individual ties and the behaviour of the ties under railroad traffic, are described and preliminary data are presented.
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