CONSTITUTIVE MODEL OF STEEL FIBRE REINFORCED CONCRETE SUBJECTED TO HIGH TEMPERATURES

Authors

  • Lukas Blesak Czech Technical University in Prague
  • Vadims Goremikins Riga Technical University
  • Frantisek Wald Czech Technical University in Prague
  • Tereza Sajdlova Czech Technical University in Prague

DOI:

https://doi.org/10.14311/AP.2016.56.0417

Keywords:

SFRC material behaviour, four-point bending test, finite element modelling

Abstract

Research on structural load-bearing systems exposed to elevated temperatures is an active topic in civil engineering. Carrying out a full-size experiment of a specimen exposed to fire is a challenging task considering not only the preparation labour but also the necessary costs. Therefore, such experiments are simulated using various software and computational models in order to predict the structural behaviour as exactly as possible. In this paper such a procedure, focusing on software simulation, is described in detail. The proposed constitutive model is based on the stress-strain curve and allows predicting SFRC material behaviour in bending at ambient and elevated temperature. SFRC material is represented by the initial linear behaviour, an instantaneous drop of stress after the initial crack occurs and its consequent specific ductility, which influences the overall modelled specimen behaviour under subjected loading. The model is calibrated with ATENA FEM software using experimental results.

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Author Biographies

  • Lukas Blesak, Czech Technical University in Prague
    Lecturer, Department of Steel and Timber Structures
  • Vadims Goremikins, Riga Technical University
    Senior researcher, Institute of Structural Engineering and Reconstruction
  • Frantisek Wald, Czech Technical University in Prague
    Professor, Department of Steel and Timber Structures
  • Tereza Sajdlova, Czech Technical University in Prague
    Student, Department of Mechanics

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Published

2016-12-31

Issue

Vol. 56 No. 6 (2016)

Section

Articles

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How to Cite

Blesak, L., Goremikins, V., Wald, F., & Sajdlova, T. (2016). CONSTITUTIVE MODEL OF STEEL FIBRE REINFORCED CONCRETE SUBJECTED TO HIGH TEMPERATURES. Acta Polytechnica, 56(6), 417-424. https://doi.org/10.14311/AP.2016.56.0417