Title:
Nonlinear Creep, Poisson’s Ratio, and Creep-Damage Interaction of Concrete in Compression
Author(s):
Claudio Mazzotti and Marco Savoia
Publication:
Materials Journal
Volume:
99
Issue:
5
Appears on pages(s):
450-457
Keywords:
compressive strength; concrete; creep; damage; Poisson’s ratio.
DOI:
10.14359/12323
Date:
9/1/2002
Abstract:
The results of a set of short-term uniaxial creep tests at low, medium, high, and very high stress levels are presented. Creep Poisson’s ratio evolution with time, nonlinear creep strain amplification, damage growth, and creep-damage interaction of concrete in compression are investigated. The electronic speckle pattern interferometry (ESPI) technique has been used to measure transverse strain also when, at high stress levels, cracks grow and propagate in concrete specimens. Under high stresses, creep Poisson’s ratio shows variation in time, associated with damage evolution. Moreover, tests showed that for medium to high stress levels, nonlinear creep strain amplification occurs, even if not accompanied by significant concrete damage.