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ON THE EXPRESSION OF COMPLETE STRESS-STRAIN CURVE FOR UNIAXIAL COMPRESSION OF CONCRETE : Analysis of the complete stress-strain curve of concrete applied element model Part 1

1986; Architectural Institute of Japan; Volume: 365; Linguagem: Inglês

10.3130/aijsx.365.0_1

2433-0000

Suenori Arinaga,

Dam Engineering and Safety

In this paper, the distributed element model, which is consisting of a elastic-plastic elements with different yield and breaking strain, is applied to the expression of complete stress-strain curve for uniaxial compression of concrete. Brief of the result of this investigation was follows. (1) The following equation can be derived to express the complete stress-strain curve for uniaxial compression of concrete. S=E(x + x_y・αx^β)e^ …(1) where, S=relative stress x=relative strain xy=relative yield strain E=Young's Modulus=[numerical formula] a=[numerical formula] Paramete β and relative yield strain xy is defined by experiment. (2) Parameter β is varied by mechanical and geometrical homogeneity, relative yield strain xy is defined by the first kink point of stress -strain curve of concrete. The complete stress-strain curve of concrete is sensitive to para-meter β and insensitive to rerative yield stra in xy. (3) The following equation is applied to the practical expression of complete stress-strain curve of concrete. S=Exe^ …(2) (4) When parameter β=1, equation (1) and (2) is equal to Smith & Young's eouation.