CONSTITUTIVE LAWS OF SOFTENED CONCRETE IN BIAXIAL TENSION-COMPRESSION

A softened truss model was developed over the last 10 years at the University of Houston for predicting the behavior of reinforced concrete subjected to shear and torsion. The model, based on the conditions of equilibrium and compatibility, employs realistic constitutive laws for concrete and reinforcement. The required constitutive laws for concrete and reinforcement were examined by testing 22 full-size reinforced concrete panels. These large test panels were subjected to tension in one direction and compression in the perpendicular direction. Testing showed that the strength and stiffness of concrete in compression were softened primarily by the presence of tensile strains in the perpendicular direction. The effect of other parameters, e.g., load path, percentage of steel, and spacing of reinforcing bars, was assessed. Based on these tests, improved softened stress-strain relationships of concrete in compression were developed.

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  • English

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  • Accession Number: 00712790
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 29 1995 12:00AM