DEVELOPMENT OF CONCRETE CONSTITUTIVE LAWS BASED ON 3D LATTICE EQUIVALENT CONTINUUM

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  • 3次元格子等価連続体に基づくコンクリート構成則の構築

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Abstract

Robust and engineering oriented three-dimensional concrete constitutive laws are formulated from equivalent continuum of lattice system. Two approaches are taken to develop these constitutive laws: one from known strain field i. e. kinematic constraint and other from known stress field i. e. static constraint; later one to incorporate poisson's ratio in the rigidity matrix. Methods are also proposed to establish the stress-strain behavior of individual concrete lattices. Finally, the developed constitutive laws are applied to analyze biaxial and triaxial test results of various researchers. Analysis results show close approximation of test data, which indicates the effectiveness of these proposed constitutive laws.

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