Fire Response of Prestressed Concrete Members


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Title: Fire Response of Prestressed Concrete Members

Author(s): Boris Bresler and Robert H. Iding

Publication: Special Publication

Volume: 80


Appears on pages(s): 69-114

Keywords: beams (supports); computer programs; concrete slabs; fire resistance; fire tests; prestressed concrete; structural analysis; thermal gradient; thermal stresses.

Date: 7/1/1983

The thermal and structural responses of prestressed concrete elements under ASTM E-119 fire test exposure were studied analytically. Comparisons of analytical results with experimentally recorded local temperatures and deflections for specimens tested by the Portland Cement Association showed good agreement. In addition, stress histories in concrete and in steel tendons and extent of cracking in concrete during the fire test exposures were determined analytically. Sensitivities in material characterization at elevated temperatures and other modeling uncertainties are discussed.