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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: Design Values for the Thermal Loading of Concrete Roofs
Author(s): Malcolm J.S. Hirst
Publication: Journal Proceedings
Appears on pages(s): 594-600
Keywords: buildings; concrete slabs; loads (forces); reinforced concrete; roofs;
solar heating; structural design; temperature measuring instruments; thermal
Abstract:An experimental investigation temperature measurements with described which links short-term long-term meteorological record to provide design values for the thermal loading of a concrete roof slab heated by solar radiation. The temperature profile of a 150 mm roof slab was monitored hourly for a year. Then daily extreme values of effective temperature and thermal moment were computed from the experimental slab. Finally, record to characterize these measured loading the structural response of the parameters were correlated with standard daily meteorological data. The resulting regression equations were than used to compute loading parameters from a 24-year weather record. Statistical analysis of this data gives a set of design values for thermal loading with defined return periods. Such values permit the code writer to select appropriate characteristic values of known probability of occurrence for the different limit states.
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