Research Article
Jul 1980
Random Thermal Stress in Concrete Containments
Authors: Mahendra P. Singh, M.ASCE, and Robert A. HellerAuthor Affiliations
Publication: Journal of the Structural Division
Volume 106, Issue 7
Abstract
Currently, the overly conservative thermal design forces are obtained on the basis of simplified assumptions made about the temperature gradient across the containment wall. Using the method presented in this paper, a more rational and better estimate of the design forces can be obtained. Herein, the outside temperature is considered to consist of a constant mean on which yearly and daily harmonic changes plus a randomly varying part are superimposed. The random part is modeled as a stationary random process. To obtain the stresses due to random and harmonic temperatures, the complex frequency response function approach has been used. Numerical results obtained for a typical containment show that the higher frequency temperature variations, though of large magnitude, induce relatively small forces in a containment. Therefore, in a containment design, a rational separation of more effective, slowly varying temperatures, such as seasonal cycle from less effective but more frequently occuring daily and hourly changes, is desirable to obtain rational design forces.
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Published In
Journal of the Structural Division
Volume 106 • Issue 7 • July 1980
Pages: 1481 - 1496
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© 1980 American Society of Civil Engineers.
History
Published in print: Jul 1980
Published online: Feb 1, 2021
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Mahendra P. Singh, M.ASCE
Assoc. Prof., Dept. of Engrg. Sci. and Mech., Virginia Polytechnic Inst. and State Univ., Blacksburg, Va.
Robert A. Heller
Prof., Dept. of Engrg. Sci. and Mechanics, Virginia Polytechnic Inst. and State Univ., Blacksburg, Va.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.