| Abstract [eng] |
The research of normal crack width of combined (fibre and ordinary reinforcement) reinforced concrete flexural members is performed in the Master’s thesis. The latest crack width calculation methods used in Europe are analysed in the research work, as well as the practical applicability of new theoretical calculation method of residual flexural tensile strength fR,1 of hooked end steel fibre reinforced concrete, proposed by Kelpša and co-authors (2015), is verified. Also, the experimental research with 96 specimens and comparative analysis of the results are performed in the work. The widely used hooked end steel fibre and structural polypropylene macro-fibre were used in the experimental research. Aim of the work. To investigate the crack width calculations of combined (fibre and ordinary reinforcement) reinforced concrete flexural members. Tasks of the work: 1. To analyse the latest crack width calculation methods of combined (fibre and ordinary reinforcement) reinforced concrete flexural members which are used in Europe. 2. To perform the experimental research of combined reinforced concrete flexural beams and to analyse the experimental results. 3. To perform the comparative theoretical calculations of crack widths by using different calculation methods. 4. To compare the experimental and theoretically calculated results. 5. To determine the influence of steel and polypropylene fibre properties on combined reinforced beams crack widths considering the experimental results and the chosen content of fibres. 6. To determine the most reliable crack width calculation method based on the research results. The composition of the work. The Master’s thesis consists of 3 chapters and conclusions. The volume of the work is 87 pages. 43 formulas are used and discussed in the project as well as 34 figures, 6 tables ant 35 literature sources are presented. |
