STRUCTURAL BEHAVIOR ANALYSIS OF MONTICELLO DAM FOR THE PERIOD SEPTEMBER 1955 TO SEPTEMBER 1963.
BUREAU OF RECLAMATION DENVER COLO
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Strain meter clusters, no-stress strain meter pairs and resistance thermometers were embedded in the concrete of Monticello Dam during construction. At about the time of completion of the dam, three plumblines were suspended from approximately the crest to the foundation of the dam in 10-inch diameter wells formed in the concrete. Twenty-three triangulation targets were mounted in a grid pattern on the downstream face of the dam and two piers for mounting a theodolite to measure movements of the targets were provided on the canyon walls downstream from the dam. Periodic readings of the three systems of measurement were continued from Septeember 1955 to September 1963 and the readings reduced to stresses and deflections which are significant in the analysis of the structural behavior of the dam. Results show a maximum compressive stress of 500 psi. Small, transient tensile stresses occurred only during early ages of the concrete. Deflections of the crest of the dam show a close relationship to climatic temperature variations. A small, continued increase in downstream deflections is evident and has been attributed to permanent deformation of the foundation rock. Author