Prohlížení Publikační činnost ČVUT dle autora "Štefan R."
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Air-entrainment as an alternative to polypropylene fibers and its effect on the compressive strength of concrete at high temperatures
Autor: Holan J.; Novák J.; Štefan R.
(IOP Publishing Ltd, 2019)Although much research has been done in the area of the fire response of concrete in the past decades, only few studies are focused on the mechanical properties of air-entrained concrete at high temperatures. This paper ... -
Experimental Investigation of the Compressive Strength of Normal-strength Air-entrained Concrete at High Temperatures
Autor: Holan J.; Novák J.; Müller P.; Štefan R.
(Elsevier Science, 2020)Over the past decades, the mechanical properties of concrete during fire have been extensively investigated; however, not many studies were aimed at the properties of air-entrained concrete (AEC), and even fewer were aimed ... -
Flexural stiffness of the composite steel and fibre-reinforced concrete circular hollow section column
Autor: Tretyakov A.; Tkalenko I.; Wald F.; Novák J.; Štefan R.; Kohoutková A.
(IOP Publishing Ltd, 2017)The recent development in technology of production and transportation of steel fibre-reinforced concrete enables its utilization in composite steel-concrete structures. This work is a part of a project which focuses on ... -
Heat transfer in hybrid fibre reinforced concrete-steel composite column exposed to a gas-fired radiant heater
Autor: Štefan R.; Procházka J.; Novák J.; Fládr J.; Wald F.; Kohoutková A.; Scheinherrová L.; Čáchová M.
(IOP Publishing Ltd, 2017)In the paper, a gas-fired radiant heater system for testing of structural elements and materials at elevated temperatures is described. The applicability of the system is illustrated on an example of the heat transfer ... -
Provzdušnění betonu jako alternativa k polypropylenovým vláknům a jeho vliv na pevnost v tlaku běžného betonu vystaveného působení vysokých teplot
Autor: Holan J.; Novák J.; Štefan R.
(BETON TKS, 2020)Ačkoliv již bylo provedeno mnoho studií zabývajících se mechanickými vlastnostmi betonu vystaveného působení vysokých teplot, pouze několik z nich se věnovalo betonu provzdušněnému. V tomto článku jsou prezentovány výsledky ... -
Regarding the Interaction Diagram of Reinforced Concrete Cross-Section
Autor: Holan J.; Štefan R.
(Trans Tech Publications, 2019)The paper deals with the problems and ambiguities that were solved while developing a computer program capable of constructing accurate interaction diagrams. These problems are not satisfactorily described in available ... -
THE STEEL AND FIBRE-REINFORCED CONCRETE CIRCULAR HOLLOW SECTION COMPOSITE COLUMN EXPOSED TO FIRE
Autor: Tkalenko I.; Tretyakov A.; Wald F.; Novák J.; Štefan R.; Kohoutková A.
(Ernst & Sohn, 2017)The recent development in technology of production and transport of the steel fibre-reinforced concrete enables its utilization in composite steel-concrete structures. This work is focused on development of mechanical ... -
To fire resistance of the steel and fibre-reinforced concrete circular hollow section column
Autor: Tretyakov A.; Tkalenko I.; Wald F.; Novák J.; Štefan R.; Kohoutková A.
(CRC Press/Balkema, 2017)Technology of production and transport of the steel fibre-reinforced concrete enables its utilization in composite steel-concrete structures. This research is focused on development of mechanical behaviour and design model ... -
To shear failure of steel and fibre-reinforced concrete circular hollow section composite column at elevated temperature
Autor: Arha T.; Křístek V.; Tretyakov A.; Blesák L.; Tkalenko I.; Wald F.; Štefan R.; Novák J.; Kohoutková A.
(Editorial Universitat Politècnica de València, 2018)This study predicts the shear strength of steel fibre reinforced concrete (SFRC) members at elevated temperature using numerical modelling. The authors derived the stress-strain relation in the pure shear mode at ambient ...