Procházení Acta Polytechnica CTU Proceedings. 2021 ( vol. 29-31) dle data publikování
Zobrazují se záznamy 21-40 z 42
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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 ... -
BIM – AN APPLICATION IN GEOTECHNICAL ENGINEERING
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)BIM model represents a significant step forward within the frame of the overall process of construction. This new approach goes from the assumption that up to date praxis, which is represented by different sets of 2D or ... -
CHANGE OF A HIGHWAY ROUTE CAUSED BY A ROCKSLIDE
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)During the spring of 2013, a relatively large rockslide with a total area of 96,952 m2 occurred in the eastern part of the Malá Fatra mountains. The anticipated depth of the slip surfaces was from 30 to 40 metres and the ... -
LANDSLIDE MONITORING IN A BUILT-UP AREA
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The article deals with the evaluation and comparison of measured data from geotechnical monitoring of a gabion wall and an adjacent slope. In 2015, new anomalous phenomena related to deformations and a shift in the area ... -
FINITE ELEMENT IMPLEMENTATION OF GEOMETRICALLY NONLINEAR CONTACT
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The OOFEM finite element software has been recently updated to include contact algorithms for small strain applications. In this work, we attempt to extend the contact algorithms to large strain problems. Reviewing the ... -
FOUNDATION OF THE NEW RAILWAY BRIDGE OVER THE NOSICKÁ DAM ON THE RIVER VÁH
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The new railway bridge over the Nosická dam is a part of the complex modernization of the railway corridor from Púchov to Žilina. Our company participated on the project using a wide variety of special foundation techniques ... -
GEOTECHNICAL ANALYSIS OF TRANSFORMING A WATER MANAGEMENT STRUCTURE TO A TRANSPORTATION STRUCTURE
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)This paper analyzes the transformation of the culvert channel under the supply channel of the Gabcíkovo Waterworks into a road tunnel structure and the impact this had on the surrounding rock environment. It presents the ... -
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 ... -
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 ... -
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 ... -
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 ... -
High-speed rail – highway 2.0?
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)High-speed rail lines should make it possible to fully replace air transport over the medium distances of Europe (about 500 km). In the Czech Republic, they are beginning to design. Estimates suggest that in five years, ... -
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 ... -
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 ... -
Maintaining the competitiveness of the czech railway industry
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The development of foreign trade plays an important role in the Czech economy. The important foreign trade commodity item is Machinery and transport equipment (SITC 7). Railway vehicles is a part of this category, other ... -
Calculation of the minimal length of the high-speed line
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)This paper explores the minimum length of continuous sections of the high-speed line. The minimum length is examined in terms of the maximum speed of high-speed vehicles. Both traditional trainsets consisting of traction ... -
Energy saving in rail transport
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)Aim of this article is to introduce and present advantages and possibilities of using simulation tools to calculate energy flows of tractive vehicle in all phases of its ride. The focus is on the braking phase, especially ... -
APPLICATION OF THE MORI-TANAKA METHOD TO DESCRIBE THE RATE-DEPENDENT BEHAVIOR OF UNIDIRECTIONAL FIBROUS COMPOSITES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)This paper examines the possibility of using the Mori-Tanaka micromechanical model describe the rate dependent behavior of the polymer matrix based fibrous composites. The generalized Leonov model is adopted to capture the ... -
High-speed rail network and periodic timetable: a comparative analysis of operational concepts
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)This paper compares chosen European high-speed railway (HS) networks in terms of their offer of HS passenger service. The criteria chosen for comparison are network topology, degree of service periodicity and degree of ...