Structural stability of a rectangular, simply-supported beam subject to a sudden air temperature change next to one surface

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For a simply-supported, rectangular beam suddenly heated on one of its surfaces by surrounding air, both elongational and flexural thermal distortions occur. For steel beams of order 10 to 30 cm thick and about 3 m long, flexural displacements, developing in minutes, occur much faster than elongational displacements which occur in hours. The rapid response of the flexural modes is caused by the early-time surface heating of the side of the beam exposed to the suddenly-heated, warmer air. The slower response of the elongation modes is a consequence of a much slower change in the average temperature of the beam. ... continued below

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16 p.

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Landram, C. S. July 3, 1997.

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Description

For a simply-supported, rectangular beam suddenly heated on one of its surfaces by surrounding air, both elongational and flexural thermal distortions occur. For steel beams of order 10 to 30 cm thick and about 3 m long, flexural displacements, developing in minutes, occur much faster than elongational displacements which occur in hours. The rapid response of the flexural modes is caused by the early-time surface heating of the side of the beam exposed to the suddenly-heated, warmer air. The slower response of the elongation modes is a consequence of a much slower change in the average temperature of the beam. At a span of 3.05 m, the maximum steady state flexural distortions in micrometers were 0.22, 0.78 and 1.56 for respective one-sided air temperature changes in degrees C of 0.28, 1 and 2.

Physical Description

16 p.

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OSTI as DE98051344

Other: FDE: PDF; PL:

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  • Other Information: PBD: 3 Jul 1997

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  • Other: DE98051344
  • Report No.: UCRL-ID--127766
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/605169 | External Link
  • Office of Scientific & Technical Information Report Number: 605169
  • Archival Resource Key: ark:/67531/metadc695782

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  • July 3, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 10, 2017, 2:02 p.m.

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Landram, C. S. Structural stability of a rectangular, simply-supported beam subject to a sudden air temperature change next to one surface, report, July 3, 1997; California. (digital.library.unt.edu/ark:/67531/metadc695782/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.