Short Column of Fiber-Reinforced Concrete Under Axial Loading: Experimental and Theoretical Modeling
摘要
Extensive studies on short discrete steel fibers show better performance in diverse parameters like strength in compression, tension, flexure, and increase in modulus of elasticity and more currently researched. The reinforced concrete short column takes predominantly axial load than the flexure but still, minimum reinforcements are provided even when concrete alone can take the compression force due to the axial load. The minimum reinforcement is required to resist the temperature stresses, avoid brittle failure, to take tension developed due to the minimum eccentricity, and to increase the ductility of the column. This paper investigates the effect of short discrete fibers experimentally and analytically on short concrete column behavior. The experimental program consists of ten 600 mm-long, 150 mm diameter specimens with circular cross-section specimens. It includes six concrete specimens with fiber in different percentages (0.5, 1, and 1.5% of the volume of the fraction), two concrete specimens with reinforcement, and two-plain cement concrete specimens. The specimens were tested under compression and loaded up to failure. The analytical program consists of model creation and to validate the experimental test results. The finite element model was created using the FEM code, ABAQUS. FE model. All of the specimens were compared after an experimental and analytical analysis of the failure pattern and load-carrying ability was conducted. It can be found that plain cement short column demands minimum reinforcement from the failure pattern and that can be satisfied with the randomly dispersed steel fibers as an alternate to reinforcement cost-effectively.