Creep Poisson's Ratio of Concrete Under Multiaxial Compression


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Title: Creep Poisson's Ratio of Concrete Under Multiaxial Compression

Author(s): K. S. Gopalakrishnan, Adam M. Neville, and Amin Ghali

Publication: Journal Proceedings

Volume: 66

Issue: 12

Appears on pages(s): 1008-1019

Keywords: biaxial stresses; combined stress:compressive strength; concretes; creep properties;creep recovery; Poisson‘s ratio; strains; stresses;triaxial stresses.

Date: 12/1/1969

Creep data are presented for concrete under different states of stress, with each stress component independently controlled. Creep in all three principal directions is reported. Under multiaxial stress, cree is somewhat smaller than under uniaxial stress. Effective creep Poisson’s ratio under multiaxial stress is lower (0.09 to 0.17) than uniaxial creep Poisson’s ratio (0. I7 to 0.20) and depends on the relative magnitude of principal stresses. Empirical expressions for creep Poisson’s ratio are derived. Data on creep recovery show the dependence of creep recovery on preceding creep as well as on stress removed. Under multiaxial compression the recoverable proportion of creep is larger than under uniaxial stress.