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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: Moving Load Tests on Three Precast Pretensioned Concrete Railway Bridges
Author(s): V. Sharma, W. L. Gamble, J. Choros, and A. J. Reinschmidt
Publication: Special Publication
Appears on pages(s): 25-46
Keywords: bridges (structures); girders; impact strength; slabs; tests; load tests (structural); precast concrete; prestressed concrete; pretensioning; railroad bridges; Structural Research
Abstract:Load tests were conducted on three recently constructed precast pretensioned concrete railroad bridges. The three bridges tested were instrumented at their centerline of span with concrete strain gages applied to appropriate locations to quantify the bridge behavior and to obtain impact factors. A dedicated test train was used to apply the loading for all the measurements. This train consisted of two locomotives followed by 10 freight cars representative of most common types of cars used in modern freight trains. The test trains had a total gross weight of 1250 tons and a length of 1400 ft and included five platform-type intermodal cars, 89-ft flat cars (TOFC/COFC), and also hopper and box cars. The test train was operated at speeds of up to 70 mph. Paper describes the bridges tested, with special emphasis on field testing techniques and the personal computer-based data acquisition system.
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