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Multiaxial strain-softening of concrete

Multiaxial strain-softening of concrete Abstract The present paper deals with an experimental investigation of the strain-softening behaviour of concrete subjected to multiaxial loading conditions. A multiaxial apparatus for testing cubical specimens was developed and built at Eindhoven University of Technology. Servocontrols in combination with stiff loading frames allowed for measuring stable post-peak response. Loading was applied to the specimens using brush bearing platens. The failure modes of uni- and triaxially loaded specimens are discussed in the first part of this paper. Important in this context were the results of uniaxial compression tests on prisms with varying height. The experiments revealed a localised fracture mode in uniaxial compression. A constant fracture energy was measured, irrespective of the specimen’s size. Furthermore, from the multiaxial tests it was found that the slope of the descending branch is dependent on the applied symmetric or non-symmetric confinement. It was concluded that strain-softening is the response of the structure formed by the specimen and the complete loading system. In Part II [15] attention will be paid to the behaviour of this “structure” subjected to multiaxial load histories. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Materials and Structures Springer Journals

Multiaxial strain-softening of concrete

Materials and Structures , Volume 19 (3): 12 – May 1, 1986

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References (47)

Publisher
Springer Journals
Copyright
1986 Bordas-Gauthier-Villars
ISSN
1359-5997
eISSN
1871-6873
DOI
10.1007/BF02472034
Publisher site
See Article on Publisher Site

Abstract

Abstract The present paper deals with an experimental investigation of the strain-softening behaviour of concrete subjected to multiaxial loading conditions. A multiaxial apparatus for testing cubical specimens was developed and built at Eindhoven University of Technology. Servocontrols in combination with stiff loading frames allowed for measuring stable post-peak response. Loading was applied to the specimens using brush bearing platens. The failure modes of uni- and triaxially loaded specimens are discussed in the first part of this paper. Important in this context were the results of uniaxial compression tests on prisms with varying height. The experiments revealed a localised fracture mode in uniaxial compression. A constant fracture energy was measured, irrespective of the specimen’s size. Furthermore, from the multiaxial tests it was found that the slope of the descending branch is dependent on the applied symmetric or non-symmetric confinement. It was concluded that strain-softening is the response of the structure formed by the specimen and the complete loading system. In Part II [15] attention will be paid to the behaviour of this “structure” subjected to multiaxial load histories.

Journal

Materials and StructuresSpringer Journals

Published: May 1, 1986

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