Behavior of Concrete under Multiaxial Stress States

by Kurt Berlin Gerstle, (F.ASCE), Prof.; Dept. of Civ., Environmental & Architectural Engrg., Univ. of Colorado, Boulder, Colo.,
Roger M. Zimmerman, (M.ASCE), Dept. of Civ. Engrg., New Mexico State Univ., Las Cruces, N.M.,
Helmut Winkler, Bundesanstalt fuer Materialpruefung, Berlin. Germany,
Leonard A. Traina, (M.ASCE), Dept. of Civ. Engrg., New Mexico State Univ., Las Cruces, N.M.,
Michael A. Taylor, (M.ASCE), Dept. of Civ. Engrg., Univ. of California, Davis, Calif.,
Gerald Schickert, Bundesanstalt fuer Materialpruefung, Berlin, Germany,
Pio Rossi, Ente Nazionale per 1'Energia Eletrica, Milan, Italy,
John B. Newman, Dept. of Civ. Engrg., Imperial College, London, England,
Diethelm Linse, Ingenieuerbuero, Dr. Kupfer, Munich, Germany; formerly, Technical Univ., Munich, Germany,
Hon-Yim Ko, (M.ASCE), Dept. of Civ., Environmental & Architectural Engrg., Univ. of Colorado, Boulder, Colo.,
Michael D. Kotsovos, Dept. of Civ. Engrg., Imperial College, London, England,
Paolo Bertacchi, Ente Nazionale per 1'Energia Eletrica, Milan, Italy,
Roberto Bellotti, Ente Nazionale per 1'Energia Eletrica, Milan, Italy,
Helmut Aschl, ASCHLCONSULT, Munich, Germany; formerly, Technical Univ., Munich, Germany,


Serial Information: Journal of the Engineering Mechanics Division, 1980, Vol. 106, Issue 6, Pg. 1383-1403


Document Type: Journal Paper

Abstract: Differences in the observed behavior of concrete under multiaxial stress states can be ascribed to either different materials or different test methods. In order to isolate the effects of these two variables, seven institutions cooperated in a test program in which specimens of indentical material were subjected to variety of biaxial and triaxial stress states common to all participants. Specimen loading conditions ranged from flexible, uniformly-stressed membranes through various intermediate conditions to rigid, rough steel plates providing uniform surface displacements. Stress-strain relations obtained are presented and examined. They indicate that there are some systematic differences in results which depend on the test method used. The principal stress-strain relations from the tests are transformed into octahedral space, and the material response is expressed in terms of variable bulk and shear moduli. A coupling effect relating volume change to stress deviation was also observed. Moduli from the biaxial and triaxial tests are compared to explore the range of validity of a inified formulation.

Subject Headings: Material tests | Triaxial tests | Stress strain relations | Triaxial loads | Biaxial strength | Steel plates | Team building

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