Comparative Evaluation of Mechanical Properties of Fibre-Reinforced Concrete and Approach to Modelling of Bearing Capacity Ground Slab

Abstract

IntroductionThe use of steel fibre-reinforced concrete for foundations or industrial floors is a typical example. In these cases, the design encompasses many input parameters that significantly influence the results. The basic requirements to optimize the design include in particular a detailed understanding of the properties of the materials used. This is especially important in the case of complex design situations and the use of advanced numerical simulations. In these cases, it is necessary to describe the material properties in a comprehensive manner. A typical case is fibre-reinforced concrete. Fibre-reinforced concrete exists in a number of variants which differ in the materials used and the shape of fibres [20]. Common problems include the fact that experimental programmes and testing focus on the properties and testing of the selected material [21]. This hinders the creation of advanced material models for the numerical simulation of the actual behaviour. This is especially the case of nonlinear analysis and the finite element method which requires a detailed computing model and a more comprehensive description of the actual material behaviour. During plane and space problems, a general state of stress emerges. It is also necessary to describe and model the damaged material. This is used to describe concrete fracture mechanics [22]. The juxtaposition of specialized tests often creates questions, thus comprising the research space for a more comprehensive description of the material properties.With regard to the research project and the goal of a comprehensive description of the material properties of steel

Measurement and Utilization of Acoustic Emission for the Analysis and Monitoring of Concrete Slabs on the Subsoil

“…These allowed sufficient description of the behaviour of FRC for the subsequently selected model of concrete. Details concerning the laboratory tests and results are summarized in [3]. C25/30 XC2 S3 had been selected as the initial matrix for the composite in conformity with classification [4].…”

“…These include cases of advanced and innovative designs or detailed analyses of non-linear structural behaviour. This field is also included in a research task consisting in the development of advanced analysis methods and design optimization of concrete slabs [1,2] with small thickness for the cases of high load [3]. The research program also comprises an extensive experimental program including laboratory tests and on-site testing.…”

“…The research itself then consists of an experimental program and measurement [3] and advanced computer modelling. The modelling is based on the use of a nonlinear analysis in combination with finite element method (FEM).…”

Parametric Study for Influence of Input Parameters for Analysis of Fibre Reinforced Concrete Slab-Soil Interaction

“…For the already implemented experimental program, computational models and analyses are created that appropriately respect the actual behaviour. Concrete slabs also contain from 0 to 75 kg/m 3 of fibre [21]. For this series of fibre concrete slabs, the total bearing capacity of the slabs was in the range of 300 to 700 kN.…”

“…For this series of fibre concrete slabs, the total bearing capacity of the slabs was in the range of 300 to 700 kN. Details of the experimental program with fibre concrete slabs are given [21]. The fibre concrete slab G02 is selected for a parametric study.…”