Prohlížení Acta Polytechnica CTU Proceedings. 2022, vol. 34 dle názvu
Zobrazují se záznamy 1-20 z 24
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A modular extension of a finite element contact implementation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The structural mechanics module of the OOFEM finite element software has been developed to include various algorithms for solving contact mechanics problems. After developing small strain contact algorithms in the 2D domain ... -
Adhesion test – testing of selected adhesives on fired clay
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The following paper deals with the comparison of adhesion of specimens made of fired clay and selected adhesives. The adhesion was tested on specimens at the age of one, two and three days in order to determine the parameters ... -
Automatic extraction of 3d building meshes from LiDAR data
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Terrestrial laser scanning and drone-based scanning are often combined to gain a complete picture of the external envelopes of buildings. While the resulting data sets are easy to understand for humans, extracting any ... -
Behavior of predried mature concrete beams subject to partial wetting and drying cycles
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The presented research focuses on the behavior of predried concrete beams with 2.5 m span subjected to cycles of nonsymmetric wetting and drying. Wetting is induced by partially immersing the specimens in a water basin. ... -
Benchmark VERCORS 2022: mechanical response of the prestressed concrete containment wall to ambient conditions
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The VERCORS benchmark was developed to provide a solid experimental basis for numerical modeling of concrete containment buildings (CCBs) to extend their lifespan. The goal of the first phase of the third benchmark is to ... -
Comparison of FETI-based domain decomposition methods for topology optimization problems
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)We critically assess the performance of several variants of dual and dual-primal domain decomposition strategies in problems with fixed subdomain partitioning and high heterogeneity in stiffness coefficients typically ... -
Detection of the presence of microorganisms during production of plasterboard
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The article introduces possibility how to use special material from plasterboard back to the production of plasterboards. The recycled material was prepared from standard plasterboards KNAUF WHITE (it means plasterboard ... -
Determination of water absorption coefficient of unfired earth materials different in used clay and ratio of components
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The paper is focused on unfired rammed earth and its water absorption properties. Increasing the utilization of raw natural materials can be one of the approaches towards sustainable development. Different prescriptions ... -
Environmental perspectives of fine grounded concrete powder: LCA case study of light-weight concrete block
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The construction elements produced with low demand for primary resources are being developed in the building industry. However, not only consumption of primary resources but also environmental impacts of such products ... -
Finite element simulation of shear and compact tension tests on timber
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The non-linear finite element simulation of the ASTM shear and pre-stressed compact tension tests was conducted. Tested specimens were cut from the glued laminated timber made of European spruce (Picea abies) with the ... -
Generation of mesostructure for lattice discrete particle model
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A preliminary study of two approaches for the internal structure generation utilized in the lattice discrete particle models (LDPM) [1] is presented. The presented methods used for particle generation and placement are ... -
Heat transfer model verification for thermal monitoring system of integral bridges
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Thermal actions considered on abutments of integral bridges by the European standard (Eurocode 1) might be in variety of certain situations underestimated. Based on this assumption, thermal monitoring system has been ... -
Influence of microstructure on rate-dependent response of unidirectional fibrous composites
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This paper outlines prediction of the macroscopic response of unidirectional fibrous composites made either from basalt or carbon fibers impregnated by a polymeric epoxy matrix. The viscoelastic response of the matrix phase ... -
Influence of oxygen and argon plasma treatment on wettability and surface morphology of polypropylene microfibers
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The surface treatment of polypropylene microfibers by plasma processing in oxygen and argon was studied with the motivation to increase their cohesion with the cement matrix. By plasma treatment, it is possible to modify ... -
Mesh generation and mechanical tests of basic element cells of porous structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Advanced porous structures are novel, emerging materials with a broad range of applicability but a rather difficult means of design and manufacturing. The advent and availability of the additive manufacturing industry in ... -
Methylene blue test and adsorption capacity of clays
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article presents results of experimental measurements focused on an ability of clay to adsorb Methylene Blue dye. This adsorption capacity is determined by a methylene blue test. Adsorption capacity could be a specific ... -
Microstructure modification of cement pastes using nanosilica
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The paper describes modifications of cement paste mixtures using nanosilica to affect their physical and chemical properties. Cement pastes from Portland cement CEM I 42.5R with three different substitution ratios of ... -
Microstructure reconstruction via artificial neural networks: a combination of causal and non-causal approach
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)We investigate the applicability of artificial neural networks (ANNs) in reconstructing a sample image of a sponge-like microstructure. We propose to reconstruct the image by predicting the phase of the current pixel based ... -
New possibilities for recycling of mineral wool separated from thermal insulation waste
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)It has become increasingly clear, that the recent consumption of mineral resources is unsustainable. The Czech Republic produces more than 217,000 tones of mineral wool annually, while its recycling stays unacceptably ... -
Phase-field damage of laminated glass in explicit dynamics
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Laminated glass is aesthetic but also functional modern material, which has spread from the automotive industry to the civil engineering in the form of design as well as structural elements. Proper design of this material ...