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|Title:||Equipment and test procedure for determining multiaxial tensile and combined tensile-compressive strength of concrete|
|Authors:||United States. Army. Office of the Chief of Engineers.|
Saucier, K. L.
|Publisher:||Concrete Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical report (U.S. Army Engineer Waterways Experiment Station) ; C-74-1.|
Abstract: A laboratory investigation was conducted to study the effect on strength of several multiaxial stress combinations related to shrinkage, temperature cracking, gravity, hydraulic loading, and foundation movement in a massive concrete structure. Nine-in. cube were tested in a brush-loading apparatus under biaxial stress, and 2-1/8-in.-diam cores were tested in a pressure vessel in the triaxial phase. Electrical-resistance strain gages affixed to some specimens provided strain data. Results are shown graphically herein and compared with results of similar work. Based on the results of this investigation, the following conclusions appear warranted: (a) the strength of concrete in biaxial compression is at least as great as it is in uniaxial compression: (b) for the purposes of most design and analysis problems, use of an idealized interaction diagram for biaxial stresses appears feasible: (c) most design and analysis conditions involving biaxial compression plus uniaxial tension can be defined by a straight-line relationship between the points of maximum biaxial and compression and uniaxial tension: unusually large induced tensile strains (>2000 millionths) may result from a condition of biaxial compression.
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