DETERMINATION OF TENSION SOFTENING DIAGRAM OF CONCRETE BY POLY-LINEAR APPROXIMATION ANALYSIS AND FLEXURAL FAILURE BEHAVIOR OF FIBER REINFORCED CONCRETE

Abstract

In this paper, the method based on the poly-linear approximation analysis is investigated to determine tension softening diagrams of concrete. This method belongs to the back analysis through the finite element method using the fictitious crack model and needs only load-displacement curves of concrete from experiments. By this method, complicated poly-linear tension softening diagrams can be determined from test results on load-displacement curves. The tension softening diagrams of three kinds of fiber reinforced concretes (fiber: aramid, vinylon and steel) are determined by this method. The flexural failure behavior of these fiber reinforced concretes is discussed.