Mechanical properties of concrete with small fibre for numerical modelling

[摘要] The study specializes in the area of mechanical properties of select fibre reinforcement concrete. For the research fibre concrete reinforced with short steel fibres was used without bending. Fibre concrete is produced in the dosing 40 and 75 kg/m3. Laboratory program includes a complete group of tests, i.e. concrete compressive strength in cubes, three-point bending test, and split tension strength perpendicular and parallel to filling direction. Results are processed in summary, and they also include fracture-mechanical parameters needed for structural modelling. The research carried out found the positive influence of fibre on tensile strength and fracture energy. However, with more fibre, only fracture energy increases. It has also been found that the effect on compressive strength is small. For numerical modelling, the suitability of using a 3D computational model in combination with the fracture-plastic material model for fibre reinforcement concrete was verified.

[发布机构] Department of Structures, Faculty of Civil Engineering, VSB-Technical University of Ostrava, Ludvíka Podét 1875/17, Ostrava-Poruba; 708 33, Czech Republic^1;Department of Building Materials and Diagnostics of Structures, VSB-Technical University of Ostrava, Ludvíka Podét 1875/17, Ostrava-Poruba; 708 33, Czech Republic^2

[学科分类] 土木及结构工程学

[关键词] Computational model;Concrete compressive strength;Fibre reinforcements;Mechanical parameters;Plastic materials;Properties of concretes;Structural modelling;Three-point bending test