The Model of Brittle Matrix Composites for Distribution of Steel Fibres / Plieninių Fibrų Pasiskirstymo Kompozituose Su Trapiomis Matricomis Modelis

Abstract

Abstract. The paper deals with the distribution of steel fibres in the mineral composite of fine aggregate. The authors have proposed the distribution of steel fibres in a composite space model based on statistical grounds. The model provides for the randomness of fibre distribution in composite space in accordance with the adopted probability distribution. The developed model has been experimentally verified. The results concerning the distribution of steel fibres in mineral composite have been obtained from the statistical model and compared with those of the model frequently applied by other authors on the basis of geometric grounds. Good compatibility of steel fibre distribution for a description of both models has been ascertained. As the amount of fibres influences the strength of composite tensile, the relationship between the above introduced feature and the quantity of fibres in the cross-section located nearby tensile failure surface has been developed with reference to the experimental tests.

Estimating the Properties of a Fine Aggregate Fibre Reinforced Cementitious Composite Using Non-Destructive Methods

“…An important element in the diagnosis of construction elements made of FRCC is to determine the distribution of fibres in the volume of the composite which are randomly arranged. Some of the non-destructive methods allow for such evaluation as electrical resistivity measurements (Lataste et al 2008), computed tomography (Pinter et al 2018), analysis of the image of cross-sections of the diagnosed element which the authors presented in the paper (Głodkowska, Kobaka 2012). The distribution of fibres in the FRCC space affects its properties to a large extent (Lusis et al 2017).…”

“…During the mixing and forming phase, the fibres tend to disperse in the composite space and they are given a spatial orientation. During the compaction of the FRCC mixture the fibres partially settle (Głodkowska, Kobaka 2012).…”

Probability Based Design of Punching Shear Resistance of Column to Slab Connections

“…Besides, most of different design codes, additionally to the methodology of partial factors (PF), also allows probability-based structural design which is very actual in recent research (Gardner 2011;soubra et al 2010;He et al 2012;Głodkowska, kobaka 2012;kong et al 2013). This is a design method which directly calculates the reliability of structure (or the index β of reliability corresponding to it), which is compared to the regulated standardized value (usually β n ).…”