Journals: Recent submissions
Now showing items 1-20 of 1744
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Hygro-mechanical model for concrete pavement with long-term drying analysis
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Concrete pavements are subjected to the combination of moisture transport, heat transport and traffic loading. A hygro-mechanical 3D finite element model was created in OOFEM software in order to analyse the stress field ... -
Extracting general knowledge of model parameters for clays out of numerous laboratory tests
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)This paper is concerned with the process of determining the material parameters of advanced constitutive models for clays. Provided results are applicable already in the early stages of geotechnical survey when no detailed ... -
Neural network based patient recovery estimation of a PAM-based rehabilitation robot
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Rehabilitation robots have shown a promise in aiding patient recovery by supporting them in repetitive, systematic training sessions. A critical factor in the success of such training is the patient’s recovery progress, ... -
Improving the energy efficiency of a tram’s running gear
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)This research analyses the influence of some design features of an undercarriage of a tram on the energy efficiency in terms of mechanical energy losses during its operation. The work includes the comparison of results of ... -
Dependence of mechanical and thermal properties on the composition of lightweight gypsum composites
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)One of the ways to use the treated gypsum waste is in gypsum mixtures for the production of gypsum blocks. Gypsum blocks can be used in standard interior as well as exterior applications and are made of gypsum, water, PP ... -
Analysis of tunnel excavation based on linear DFN-FEM modelling
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Simulations of tunnel excavations have to take into account the natural occurrence of joints and faults in the surrounding rock mass, which dominantly control its mechanical response. In this paper, we present work in ... -
The effects of potassium permanganate on the geotechnical properties of soils
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)In Nigeria, potassium permanganate (KMnO4) is used as a chemical oxidant in the removal of hydrocarbons from polluted soils and groundwater, but there is no information on the effects of KMnO4 on the geotechnical properties ... -
Return mapping scheme for the Hoek-Brown model with tension cut-off
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)The present paper revisits a stress update procedure for the Hoek-Brown plasticity model enhanced by a Rankine type of tension cut-off failure criterion. Limiting tensile stresses not only supports the behavior of weak ... -
From positional representation of numbers to positional representation of vectors
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)To represent real m-dimensional vectors, a positional vector system given by a non-singular matrix M ∈ ℤm×m and a digit set Ɗ ⊂ ℤm is used. If m = 1, the system coincides with the well known numeration system used to ... -
Qualitative sign stability of linear time invariant descriptor systems
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)This article discusses assessing the instability of a continuous linear homogeneous timeinvariant descriptor system. Some necessary conditions and sufficient conditions are derived to establish the stability of a matrix ... -
Bacterially induced calcite formation at the surface of recycled concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)The construction industry is one of the main sources of greenhouse gas emissions, and portland cement production is responsible for approximately 8 % of anthropogenic CO2 emissions. Microbially induced calcium precipitation ... -
Modelling of laminated glass interlayer by fractional viscoelasticity
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Fractional calculus, i.e. the theory of derivatives and integrals of non-integer order, can be efficiently used for the theoretical modelling of viscoelastic materials. Our research is focused on the polyvinyl butyral which ... -
Bar-supported and unsupported dental implants: a QCT-FEA study in human maxilla
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Two variants of implant-supported overdentures (IODs) were investigated by quantitative computed tomography-assisted finite element method (QCT-FEA) on a patient-specific CTreconstructed model of human maxilla. The analyzed ... -
The experimental evaluation of tensile forces in stays of a cable-stayed footbridge
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)The topic of this paper is an experimental analysis of the dynamic behaviour of stays of an existing footbridge focusing on determination of the tensile forces in stays. The examined structure was the footbridge across the ... -
The influence of lithium water glass on the durability of concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)The aim of the research is to verify the effect of lithium water glass on the durability and reduction of concrete absorption. For this purpose, the absorption test was made and the influence of the impregnation agent on ... -
Generation of LDPM structure formed by Voronoi cells
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)A preliminary study of an approach to internal structure generation used in lattice discrete particle models (LDPMs) [1]. The presented method used for particle generation and placement is intended to help realistically ... -
Treatment of polypropylene microfibers by atmospheric and low-pressure plasma – application to a reinforced cement composite containing recycled concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)The effect of atmospheric and low-pressure plasma modification on polypropylene (PP) microfibers was examined. Mechanical changes on the microfiber surfaces were observed using scanning electron microscopy (SEM). Next, ... -
Comparison of behaviour of burnt beams models with effective and actual residual cross-sections in three point bending test
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Glued laminated timber beams exposed to fire of a variable duration were tested in three point bending. Three types of model geometries taking into account the effect of burning were created. Each model was examined for ... -
The footbridge Jesípek – application of radar interferometry for dynamic response evaluation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Recent advances in radar systems have led to the development of radar interferometry (RI) methods for contactless vibration monitoring of large-scale structures, i.e. bridges, water tower reservoirs, and factory chimneys. ... -
Fractional multi-loop active disturbance rejection control for a lower knee exoskeleton system
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Rehabilitation Exoskeleton is becoming more and more important in physiotherapists’ routine work. To improve the treatment performance, such as reducing the recovery period and/or monitoring and reacting to unpredictable ...