NED University Journal of Research
An International Journal
ISSN 2304-716X




ELASTO-DAMAGE MODEL FOR HIGH STRENGTH CONCRETE SUBJECTED TO MULTIAXIAL LOADING

Author(s): A.R. Khan, A.H. Al-Gadhib, M. H. Baluch.

Volume: V

No: 1

Pages: 82-114

Date: June 2008

Abstract:
An effective compliance matrix is proposed to model the behaviour of concrete based on phenomenological evidences and physical insight. Three parameters a, and ? were introduced in the effective compliance matrix . a and are introduced to model the different behavior of concrete in tension and compression while the third parameter ? was introduced to account for volumetric change. The predictive capability of the proposed elasto-damage model for uniaxial and multiaxial stress path was investigated for uniaxial compression, biaxial compression, triaxial compression, uniaxial tension and tension-compression-compression. The simulative capability of the model to capture the phenomenological behavior of concrete such as strain softening, stiffness degradation, biaxial strength envelope, volumetric dilatation, different behavior in tension and compression, and gain in strength under increasing confinement is reflected. The predicted results correlate well with the available experimental data

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