Prohlížení Acta Polytechnica CTU Proceedings. 2021 ( vol. 29-31) dle názvu
Zobrazují se záznamy 29-42 z 42
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ON COMPARISON OF 3D ISOGEOMETRIC TIMOSHENKO AND BERNOULLI BEAM FORMULATIONS
(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
(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
(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 ... -
Possibilities of high-speed railway turnout data description
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)This paper aims to summarize possibilities how to create data models of high-speed railway turnouts. The turnouts designed for high-speed operation require specific geometric solution. As the UIC RailTopoModel is considered ... -
Possible changes in transport conception of international and long-distance railway connections relating the construction of new high-speed railway lines in the Czech Republic
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The aim of this article is to deal with the issue of high-speed railway lines (HSL) in the Czech Republic in response to the Fast connections conception ("Rychlá spojení" in Czech, abbreviation "RS"). Currently the RS1, ... -
Railway superstructure for high-speed rails
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The construction of the track is solved as a conventional (with track ballast) or as a ballastless track (without track ballast). When deciding on the choice of the most suitable track design for high-speed rail, it is ... -
RECENT ADVANCES IN SIMULATING LANDSLIDE AND DEBRIS FLOW
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)This paper summarizes the outcome of a research project funded by the European Commission on the simulation of landslide and debris flow. The numerical techniques adopted include the mesh-based method (FEM), the point-based ... -
Research tools aplicable in designing of high-speed and high-power rail vehicles
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The importance of the railway transport of both goods and passengers continuously grows as it is in many points of view more ecological and economical solution in comparison with road transport. Just the importance has ... -
SIMULATION OF T-JOINTS BETWEEN RHS STEEL MEMBERS WITH OFFSET IN ABAQUS CAE
(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
(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 ... -
The assessment of priorities in the construction of new high-speed railway lines in Czech Republic by using the stem method
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The aim of the paper is to set priority of The Fast Connection sections ("Rychlá spojení" in Czech, abbreviation "RS") building mentioned above by using the STEM method. The method is used to select projects with the maximum ... -
THE OLDEST UNDERGROUND RAILWAYS IN THE WORLD AND THEIR ANNIVERSARIES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The five oldest underground railways started to be operational in the 19th century. These were the metros in London, Athens, Istanbul, Budapest and Glasgow. Undoubtedly, world primacy of status in terms of age belongs to ... -
THERMO-MECHANICAL MODEL FOR CONCRETE PAVEMENT
(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, ... -
Vehicle/track interaction under the conditions of high speed railway operation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)This paper deals with the issue of dynamic effects of a high-speed railway vehicle on the track. Some aspects of vehicle/track interaction at higher speeds are described. In this context, a multi-body model of high-speed ...