RESEARCH ON THE STRESS-STRAIN CURVE OF SFRC BEAMS UNDER 4-POINT BENDING

摘要

A method is introduced in this article by which we can successfully transform the experimental load-deflection curve of a 4-point bending beam to the corresponding stress-strain curve. In addition, according to the Weibull statistical distribution and phenomenological method, and starting from the study of damage, a damage constitutive model of SFRC under single direction loading is proposed. The model depends only on the elastic modulus and the peak stress and peak strain of specimens, and then the constitutive equation and damage evolution equation are obtained.