Acta Polytechnica CTU Proceedings. 2017 ( vol. 7-13): Poslední příspěvky

Zobrazují se záznamy 41-60 z 115

    • REMOVAL OF DIQUATERNARY AMMONIUM CATIONS FROM AS-SYNTHESIZED SSZ-16 ZEOLITE 

      Autor: Supinkova, Tatana; Jirka, Ivan; Drahokoupil, Jan; Langmaier, Jan; Fila, Vlastimil; Brabec, Libor; Kocirik, Milan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Zeolites are stable microporous aluminosilicates with numerous applications in chemical technology such as separation of species and catalytic transformations. Our study is focused on a weakly explored zeolite SSZ-16 with ...

    • DEVELOPMENT OF THE MUNICIPAL NOISE-ABSORBING SCREEN AND TEST SECTION CONSTRUCTION TECHNOLOGY 

      Autor: Bret, Ondřej; Čížková, Petra
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The article presents the development and construction technology of the Municipal noise-absorbing screen (MNAS) – in Czech "Mestská protihluková clona" (MPHC). The Municipal noise-absorbing screen is a new acoustical element ...

    • COMPARISON OF LANGUAGE SUBSET AND LANGUAGE EXTENSION BY SAFE RELATED INFORMATION APPROACH TO SAFE SYSTEM DEVELOPMENT 

      Autor: Brandejský, Tomáš; Fábera, Vít
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Presented contribution is dedicated to discussion of two different approaches into increase of programming language safety. They are language subset and extension of original safety mechanisms. As examples we used MISRA ...

    • STABILIZATION AND SPECIFICATION OF CHARACTERISTIC VALUE OF GEOTECHNICAL PARAMETERS 

      Autor: Vaníček, Ivan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Soil stabilization, process, by which the soil properties are improved, is getting growing attention during last periods. Paper is focused on application for earth structures. Methods of soil stabilization together with ...

    • TESTING METHODS FOR MECHANICALLY IMPROVED SOILS: RELIABILITY AND VALIDITY 

      Autor: Petkovšek, Ana; Maček, Matej; Smolar, Jasna
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      A possibility of in-situ mechanical improvement for reducing the liquefaction potential of silty sands was investigated by using three different techniques: Vibratory Roller Compaction, Rapid Impact Compaction (RIC) and ...

    • FRICTION BUFFER STOP DESIGN 

      Autor: Guziur, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Friction buffer stops are the favoured construction of buffer stop, mainly due to its high resistance and variety of layout. Last but not least is its manner of deceleration induced upon impact and during the braking what ...

    • LANDSLIDE RECLAMATION IN ŠÁRKA VALLEY 

      Autor: Vaníček, Martin
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Housing development in Šárka’s valley is situated in former brickworks – borrow pit for brick-clay. On its north side the borrow pit cutting is up to 8m high with main road on top. This slope was suffering from progressive ...

    • DESIGN OF SUBSOIL IMPROVEMENT BELOW HALL FLOORS 

      Autor: Turček, Peter; Súlovská, Monika
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The construction of an industrial park is now being prepared near the town of Nitra. The investor fixed very strict conditions for the bearing capacity and, above all, the settlement of halls and their floors. The geological ...

    • TEMPERATURE OF SOIL MONITORED AT EXPERIMENTAL SITES IN PERM REGION (RUSSIA) 

      Autor: Ponomaryov, Andrey; Zakharov, Aleksandr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      of the city of Perm (Russia). The monitoring results are presented for two experimental sites. Site 1 is characterized by dense urban development and related to type I soil conditions in Perm (the left-bank area of Perm). ...

    • VARIATIONALLY-BASED EFFECTIVE DYNAMIC THICKNESS FOR LAMINATED GLASS BEAMS 

      Autor: Schmidt, Jaroslav; Zemanová, Alena; Janda, Tomáš; Zeman, Jan; Šejnoha, Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Laminated glass, consisting of glass layers connected with transparent foils, has found its applications in civil, automotive, or marine engineering. Due to a high contrast in layer properties, mechanical response of ...

    • PERFORMANCE OF CEMENT COMPOSITES REINFORCED WITH SURFACE-MODIFIED POLYPROPYLENE MICRO- AND MACRO-FIBERS 

      Autor: Antoš, Jakub; Dejdar, Lukáš; Trejbal, Jan; Prošek, Zdeněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      This paper focuses on the mechanical properties investigation of cement pastes reinforced with surface treated polymer fibers. The cement matrix was composed of Portland cement (CEM I 42.5 R, w/c ratio equal to 0.4). Two ...

    • COUPLED SIMULATION FOR FIRE-EXPOSED STRUCTURES USING CFD AND THERMO-MECHANICAL MODELS 

      Autor: Šulc, Stanislav; Šmilauer, Vít; Wald, František
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Fire resistance of buildings is based on fire tests in furnaces with gas burners. However, the tests are very expensive and time consuming. This article presents a coupled simulation of an element loaded by a force and a ...

    • PULLOUT BEHAVIOR OF OXYGEN PLASMA TREATED POLYMER FIBERS FROM CEMENT MATRIX 

      Autor: Trejbal, Jan; Horová, Tereza; Prošek, Zdeněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The aim of this work is to describe bonding properties between surface treated polymer fibers and a cement matrix. In order to increase an interaction between the matrix and fiber surfaces, two fiber types having approx. ...

    • EVALUATION OF EFFECTIVE PROPERTIES OF BASALT TEXTILE REINFORCED CERAMIC MATRIX COMPOSITES 

      Autor: Valentová, Soňa; Hrbek, Vladimír; Šejnoha, Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The present paper is concerned with the analysis of a ceramic matrix composite, more specifically the plain weave textile fabric composite made of basalt fibers embedded into the pyrolyzed polysiloxane matrix. Attention ...

    • HYDRATION PROCESS AND MECHANICAL PROPERTIES OF CEMENT PASTE WITH RECYCLED CONCRETE POWDER AND SILICA SAND POWDER 

      Autor: Topič, Jaroslav; Prošek, Zdeněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Recycled concrete powder (RCP) mostly consisting of cement paste could be reused as partial cement replacement. The aim of this paper is to compare hydration and mechanical properties of RCP and two types of silica sand ...

    • OPTIMIZATION-BASED APPROACH TO TILING OF FINITE AREAS WITH ARBITRARY SETS OF WANG TILES 

      Autor: Tyburec, Marek; Zeman, Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Wang tiles proved to be a convenient tool for the design of aperiodic tilings in computer graphics and in materials engineering. While there are several algorithms for generation of finite-sized tilings, they exploit the ...

    • COMPARISON OF FAILURE CRITERIA FOR WOOD IN TENSILE-SHEAR STRESS STATE 

      Autor: Šmídová, Eliška; Kabele, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      An orthotropic failure criterion enhancing the Lourenco's criterion by a shear strength multiplier and a maximum shear strength upper bound has been recently proposed and validated for timber under tensile and shear loading ...

    • MODAL ANALYSIS FOR REVISION OF A FEM MODEL OF A STEEL TRUSS BEAM 

      Autor: Venglar, Michal; Sokol, Milan; Marfoldi, Monika
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The paper deals with a preparation of a complex FEM model for a local damage detection. The initial verified and validated three-dimensional FEM model of a steel truss bridge in laboratory is revised step-by-step to achieve ...

    • PREPARING OF THE CHAMELEON COATING BY THE ION JET DEPOSITION METHOD 

      Autor: Skocdopole, Jakub; Aversa, Lucrezia; Golan, Martin; Schenk, Antonin; Baldi, Giacomo; Kratochvilova, Irena; Kalvoda, Ladislav; Nozar, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Preparation of chameleon coatings using an Ionized Jet Deposition (IJD) technique is reported in the present paper. IJD is a new flexible method for thin film deposition developed by Noivion, Srl. The chameleon coatings ...

    • INFLUENCE OF MACHINING TECHNOLOGIES ON VALUES OF RESIDUAL STRESSES OF OXIDE CUTTING CERAMICS 

      Autor: Němeček, Jakub; Kolařík, Kamil; Čapek, Jiří; Ganev, Nikolaj
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Currently, the intensive development of engineering ceramic and effort to replace sintered carbides as cutting materials are in progress. With the development of the sintering technology it is now possible to produce compact ...