Prohlížení Publikační činnost ČVUT dle autora "Novák J."
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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 ... -
The Application of Building Physics in the Design of Roof Windows
Autor: Tywoniak J.; Calta V.; Staněk K.; Novák J.; Maierová L.
(Multidisciplinary Digital Publishing Institute (MDPI AG), 2019)This paper deals with a small but important component in a building envelope, namely roof windows in pitched roofs. Building physics methods were used to support the search for new solutions which correspond to the maximum ... -
B-bar FEMs for anisotropic elasticity
Autor: Oberrecht S.P.; Novák J.; Krysl P.
(John Wiley & Sons, Inc., 2014)Anisotropic elastic materials, such as homogenized model of fiber-reinforced matrix, can display near rigidity under certain applied stress– the resulting strains are small compared to the strains that would occur for other ... -
Chování vláknobetonu za vyšších teplot
Autor: Kohoutková A.; Novák J.
(Slovenská technická univerzita v Bratislave, 2016)Projektování nosných konstrukcí obsahuje povinný návrh požární odolnosti. Beton jako nejrozšířenější stavební materiál má řadu předností, ale zároveň některé nedostatky, které ovlivňují chování betonu za vysokých teplot. ... -
Časově závislé vlastnosti a chování cementových kompozitů v povýrobní fázi
Autor: Novák J.; Kohoutková A.
(Česká betonářská společnost ČSSI, 2020)Nezadržitelný vývoj v betonovém stavitelství v podobě implementace nových materiálů a výrobních technologií vyžaduje výrazně hlubší znalosti o chování kompozitů na cementové bázi. Typickým příkladem je technologie 3D tisku, ... -
Destructive and non-destructive experimental investigation of polypropylene fibre reinforced concrete subjected to high temperature
Autor: Müller P.; Novák J.; Holan J.
(Elsevier, 2019)Long-term exposure to high temperature results in the change in both strength properties and mechanical behaviour of concrete. The aim of this paper was to focus on the performance of selected concrete composites, particularly ... -
Development of Urban Electric Bus Drivetrain
Autor: Sivkov O.; Musálek L.; Novák J.; Novák M.; Chyský J.; Novák L.
(ERGO NOMEN, 2019)The development of the drivetrain for a new series of urban electric buses is presented in the paper. The traction and design properties of several drive variants are compared. The efficiency of the drive was tested using ... -
Duktilita plastbetonu s příměsí ocelových vláken
Autor: Tipka M.; Novák J.; Horáková A.; Chylík R.; Trtík T.
(ČBS - Česká betonářská společnost ČSSI, 2018)Prezentovaný článek se zabývá analýzou plastbetonu s příměsí ocelových vláken s cílem ověřit synergii vláken s polymerovou matricí za účelem zvýšení duktility materiálu. Chování materiálu bylo ověřeno na referenčních ... -
Energy consumption optimization for thermal energy harvester applications
Autor: Teplý T.; Janíček V.; Novák J.; Husák M.; Bouřa A.
(Západočeská univerzita v Plzni, 2020)This paper demonstrates the concept of node consumption reduction for IoT applications. The main emphasis is placed on the autonomy of the whole device, which must be independent of external power supply. That is why energy ... -
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 ... -
Experimental Investigation on SFRC behaviour under elevated temperature
Autor: Goremikins V.; Blesák L.; Novák J.; Wald F.
(Multi-Science Publishing Co Ltd, 2017)Steel fibres being added to a concrete mixture lead to an overall improvement of such a mixture considering several factors, such as mechanical resistance, fire resistance, creep stability and other. Besides steel fibres, ... -
Feasibility Study of Material-modified Precast Element Used in the Railway Industry
Autor: Novák J.; Kohoutková A.
(ČVUT v Praze, Fakulta stavební, 2016)Fiber reinforced concrete (FRC) is a material whose utilization in the concrete industry has been rapidly increasing recently. The use of this specific material over conventional forms of concrete can lead to many benefits ... -
Fibre reinforced concrete exposed to elevated temperature
Autor: Novák J.; Kohoutková A.
(IOP Publishing Ltd, 2017)Although concrete when subject to fire performs very well, its behaviour and properties change dramatically under high temperature due to damaged microstructure and mesostructure. As fibre reinforced concrete (FRC) represents ... -
Fire response of Hybrid Fiber Reinforced Concrete to High Temperature
Autor: Novák J.; Kohoutková A.
(Elsevier, 2017)The building industry offers a wide range of materials whose structural behavior is more or less affected by temperature. While the knowledge and experience with concrete behavior under ambient temperature are well-known, ... -
FlexRay ECU mission critical parameters measurement
Autor: Sobotka J.; Novák J.
(Elsevier, 2017)Network operation of FlexRay Electronic Control Unit (ECU) in passenger cars is influenced by the significant number of parameters that have to be written into the ECU FlexRay controller. To keep the FlexRay network robust, ... -
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 ... -
Interface Behavior and Interface Tensile Strength of a Hardened Concrete Mixture with a Coarse Aggregate for Additive Manufacturing
Autor: Novák J.; Kohoutková A.; Vespalec A.; Vosynek P.; Podroužek J.; Škaroupka D.; Zikmund T.; Kaiser J.; Paloušek D.
(MDPI AG, 2020)3D concrete printing technology (3DCP) is a relatively new technology that was first established in the 1990s. The main weakness of the technology is the interface strength between the extruded layers, which are deposited ... -
IoT applications utilizing excess heat in electrical lighting fixtures
Autor: Novák J.; Janíček V.; Husák M.; Teplý T.; Foit J.; Bouřa A.
(Západočeská univerzita v Plzni, 2020)The development of IoT instrumentation will always be strongly influenced by the properties of the power supply system. A large number of IoT nodes creates a danger of extra expenditures when changing the battery. For this ... -
Konstrukční prvky s aplikací vláknobetonu
Autor: Novák J.; Kohoutková A.; Vladimír Brejcha V
(ČBS - Česká betonářská společnost ČSSI, 2016)Stavební průmysl nabízí mnoho materiálů, které je možné využít pro výrobu různých konstrukčních prvků. Vláknobeton je materiál, který stále častěji nachází uplatnění v reálných betonových konstrukcích. Důvodem jsou jeho ...