Nonlinear analysis of multi-layer steel fiber reinforced concrete beams

Abstract

This paper presents the results of an experimental study involved testing of double-layer reinforced concrete beams in two cases: Steel fiber concrete layer is located below, and is located above of the normal concrete layer. The size of the beams is 15x30x220cm. in which the steel fiber concrete layer is 10cm thick, all the beam samples were tested under two-point loads. ANSYS has simulated experimental beams as load-vertical displacement relationship, load- compression strain relationship, load-tensile strain relationship at the middle of the span of the beams. Experimental results and numerical installation of ANSYS of double-layer steel fiber concrete beams were compared with three-layer steel fiber reinforced concrete beams of the same size. In three-layer steel fiber reinforced concrete beams, the 10cm thick steel fiber concrete layer is located below, and is located above, a middle layer is the normal concrete layer. Concrete of beams is B30 for all layers, all types of beams with steel fiber content in concrete is 2% by volume, with nonlinear material analysis in ANSYS numerical simulation. The data are compared with each other results show that the two-layer Steel fiber reinforced concrete beams are damaged the slowest, the three-layer fiber concrete beams are damaged very early in other beams. Experimental results also show that the vertical displacement, tensile strain and compressive strain values are 30-40% larger than the simulated 2-layer and 3-layer beams.