Research Article
Mar 1971
Determination of In Situ Stresses in Concrete Dams
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The in situ stresses within three concrete dams on the Salt River above Phoenix were determined by application of a three-directional borehole deformation gage. Two of the dams showed some signs of deterioration and structural cracking due to alkali aggregate reaction, thus requiring stress determinations for safety evaluation. Information on in situ stresses in the other dam was needed for design of expanded power facilities. The stress relief method, its verification tests and applications are examined. Best results for three-dimensional stress analyses are obtained if the drill holes are orthogonal, however, a technique is presented for evaluating reliability of results obtained from having various orientations. The resulting stresses from the stress relief tests are compared with those computed by the trial load method. Maximum water surface and minimum concrete temperatures were the loading criteria for both methods. The 6-in. overcores were tested in the laboratory to determine the ability of the concrete to resist the in situ stresses.
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Information
Published In
Journal of the Power Division
Volume 97 • Issue 2 • March 1971
Pages: 455 - 473
Copyright
© 1971 American Society of Civil Engineers.
History
Published in print: Mar 1971
Published online: Feb 11, 2021
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Authors
Affiliations
Merlin D. Copen, F.ASCE
Head, Concrete Dams Section, Div. of Design, U.S. Bureau of Reclamation, Denver, Colo.
George B. Wallace, M.ASCE
Head, Structural and Rock Mechanics Section, Div. of Research, U.S. Bureau of Reclamation, Denver, Colo.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
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.
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.