Prohlížení Acta Polytechnica CTU Proceedings. 2021, vol. 30 dle názvu

Zobrazují se záznamy 13-24 z 24

    • MECHANICAL AND CHEMICAL ACTIVATION OF BLAST FURNACE SLAG AND ITS INFLUENCE ON THE MECHANICAL PROPERTIES OF THE RESULTING CEMENT PASTE 

      Autor: Horych, Jan; Tesárek, Pavel; Prošek, Zdeněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The usage of waste materials is a very important global topic. The large amount of waste everywhere in the world needs to be processed or disposed. Landfilling is not an option anymore, because of European legislation and ...

    • MICRONIZED CONCRETE POWDER AS MIRCOFILLER IN CEMENT PASTE: INFLUENCE ON HYDRATION AND STRUCTURE 

      Autor: Topič, Jaroslav; Prošek, Zdeněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The reuse of old concrete as a coarse and fine recycled aggregate in cement composites is relatively well researched, and therefore a very fine fraction of recycled concrete was used in this paper. When using a very fine ...

    • MODELING TIME-DEPENDENT DEFORMATIONS OF CONCRETE MEMBERS SUBJECTED TO SYMMETRIC AND ASYMMETRIC DRYING 

      Autor: Horák, Pavel; Havlásek, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The time-dependent behavior of concrete members with uniform cross-section subjected to symmetric drying can be predicted with one of many models anchored in the design codes. Since these models use the cross-sectional ...

    • MODELLING OF TIME-DEPENDENT BEHAVIOUR OF PARTICULATE THERMOSET POLYMERS 

      Autor: Vozáb, Jan; Vorel, Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      A preliminary study of a numerical model describing the behaviour of polymer-based composites is presented. The numerical model consists of three main parts. The first is the microplane M4 model, which is the main part of ...

    • NUMERICAL COMPARISON OF TRANSGINGIVAL AND SUBGINGIVAL DENTAL IMPLANTS IN REGARD TO THEIR STRESS DISTRIBUTIONS 

      Autor: Řehounek, Luboš; Jíra, Aleš; Javorská, Gabriela; Bodlák, Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      Most modern dental implants differentiate in regard to the fixation of the abutment into two main categories - the external or internal hexagon or octagon. We performed mechanical tests according to the ČSN EN ISO 14801 ...

    • NUMERICAL SIMULATION OF SLUMP FLOW TEST OF CEMENT PASTE COMPOSITES 

      Autor: Němeček, Jiří; Němeček, Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      This study presents a numerical simulation of the mini-slump flow test performed on the Haegerman table, according to EN 1015-3. The two-dimensional axisymmetrical Volume of fluid (VOF) model is used for the calculation. ...

    • ON COMPARISON OF 3D ISOGEOMETRIC TIMOSHENKO AND BERNOULLI BEAM FORMULATIONS 

      Autor: Dvořáková, Edita; Patzák, Bořek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      Application of isogeometric analysis (IGA) for curved beams is very convenient for its ability of exact representation of curved geometries. Several beam formulation has been presented since the introduction of IGA. In ...

    • OPTIMIZATION OF TUNED MASS DAMPERS ATTACHED TO DAMPED STRUCTURES - MINIMIZATION OF MAXIMUM DISPLACEMENT AND ACCELERATION 

      Autor: Štěpánek, Jan; Máca, Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      A tuned mass damper is a device, which can be highly helpful while dealing with dynamic behaviour of structures. Its proper design is conditioned by knowledge of both loading and the structure properties. In many cases, ...

    • PLASMA MODIFICATION OF MICROFIBERS - APPLICATION TO LIGHTWEIGHT CEMENT COMPOSITE CONTAINING RECYCLED CONCRETE 

      Autor: Ďureje, Jakub; Prošek, Zdeněk; Trejbal, Jan; Tesárek, Pavel; Potocký, Štěpán
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The article deals with the optimalization of composition for reinforced lightweight cement composite containing micronized recycled concrete, which will be used to produce masonry blocks. The composite material is reinforced ...

    • SIMULATION OF T-JOINTS BETWEEN RHS STEEL MEMBERS WITH OFFSET IN ABAQUS CAE 

      Autor: Kalmykova, Svitlana
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The current paper focuses on numerical simulation peculiarities of offset welded rectangular hollow section joints. Understanding the modelling techniques can result in easier and faster and above all correct outcomes from ...

    • SIZE EFFECT ON THE ULTIMATE DRYING SHRINKAGE OF CEMENT MORTAR: 1-YEAR EXPERIMENT AND NUMERICAL MODELING 

      Autor: Dohnalová, Lenka; Havlásek, Petr; Šmilauer, Vít; Reiterman, Pavel; Davidová, Vendula
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The magnitude and time evolution of shrinkage are influenced by numerous factors which are implemented in the design codes often in a different way. The time-dependent behavior of concrete in structures sensitive to creep ...

    • THERMO-MECHANICAL MODEL FOR CONCRETE PAVEMENT 

      Autor: Veselý, Jakub; Šmilauer, Vít
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      This paper describes a numerical thermo-mechanical model for concrete pavement, implemented in OOFEM software. The thermal part is a heat transfer problem with appropriate initial and boundary conditions (sun irradiation, ...