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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: Phoenix Airport Terminal Building-A Prestressed Challenge
Author(s): Walter E. Riley
Publication: Journal Proceedings
Appears on pages(s): 137-150
Abstract:The new Phoenix Municipal Airport Terminal roof consists of twenty-two 8 ft wide prestressed T-beams 152 ft long supported on cast-in-place concrete girders. The T-beams have a clear span of 84 ft and cantilever at each end, 34 ft. It was desired to expose the end of the T-beams and to limit the depth to 3 ft. This results in a shallow beam having a depth to span ratio of l/28. A combination pretensioned and post-tensioned design was approved for the building, subject to testing for deflection control. Prestressed tees with long overhangs may be safely analyzed for strength using theoretical mechanics; however, only instantaneous deflections can be calculated accurately. Long-time deflections should be predicted by load testing. Deflection analysis, load tests, and field deflections are discussed.
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