Stage model of stress-strain relationship for concrete under short-term load: Part 2: Nature of concrete atrophy

✍ Scribed by I. Blechman

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 440 KB
• Volume: 19
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(89)90060-4

✦ Synopsis

The existence of microcracks prior to loading indicates that contraction of the cement matrix is accompanied by its tensioning and rupture. In parallel, the contraction creates tensioned "granules" in the mortar as well. It is shown that the elastic modulus of concrete does not vary during loading, but remains constant. During loading, under the action of the transverse tensile strains, the tensioned granules rupture first, microcracking appears and leads to atrophy and accordingly to non-linear behavior of the conrete. At the same time, because of the constancy of the elastic modulus, the specific stresses related to the live cross-section remain linearly proportional to the strains as well.