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Evaluation of environmental load by polybrominated diphenyl ethers
Roček, Richard ; Stoupalová, Michaela (referee) ; Vávrová, Milada (advisor)
The target of my diploma thesis is evaluation of soil load by polybrominated diphenylethers. This is the soils, which were affected by fire and comparsion with load by soils, which were not affected by fire. In teoretical part available informations about BDE from various sources are processed. Target of practical part is find the optimal method for determination BDE, verification of her yield a determination of reals samples with using this method. In the end this thesis contains measured results, its interpetation in tables, graphes and evaluation of load by individual congeners. Key is comparsion load of soils, which were affected and which were not affected by fire. BDE are released during the fire and we can decide that soils which were caused by fire should be contaminated more, than soils, which were not caused by fire.
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ASSESSMENT OF REINFORCED CONCRETE STRUCTURES EXPOSED TO ELEVATED TEMPERATURES
Rozsypalová, Iva ; Kolář,, Karel (referee) ; Vítek,, Jan (referee) ; Daněk, Petr (advisor)
Doctoral thesis is focused on the assessment of concrete structures after fire exposure and extends the knowledge in view of the main aims of the research defined in the objectives of his work. Thanks to the performed fire tests of full-scale concrete specimens, material characteristics corresponding to actual fire load have been assessed for different temperature levels. Resulting from presented research, main steps of assessment procedure have been recommended for both destructive and non-destructive tests of concrete after exposure to fire. Furthermore, behaviour of FRP reinforcement at elevated temperatures have been investigated. Aiming to determine the effects of fire exposure on reinforced concrete structures, experimental program have been defined and performed, including concrete beams reinforced with either steel, or composite reinforcement with glass or carbon fibres and subjected to experimentally simulated fire load. After cooling, bending test have been executed. Above mentioned experimental program was further complemented by extensive numerical analysis. Finally, presented work provides guidelines regarding further investigations required in this field of research.
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Volumetric Efects Accelerated on GPU
Kubovčík, Tomáš ; Tóth, Michal (referee) ; Starka, Tomáš (advisor)
This thesis deals with simulation and rendering of fluid based volumetric effects, especially effect of fire and smoke. Computations are accelerated on graphics card using modern graphics API with motivation to achieve realistic visual results as well as physically correct calculations. Implemented volumetric effects are distributed as dynamic library which allows addition of these effects to existing applications.
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Smoke and Fire Detection in Video Sequences
Tomek, Peter ; Štancl, Vít (referee) ; Švub, Miroslav (advisor)
This thesis aims to analyse a videosignal given in input and find segments that contains fire or smoke. The problem is divided into two cases-detection of fire and detection of smoke. The first and main step of analysation is detection of segments by Gaussian mixture model that is trained by Expectation-Maximization algorithm, or shortly EM algorithm. For smoke detection is than used method of optical flow. The final segments are than processed by some morphological methods and determination of their position is made. Finally, the output of algorithm is again a videosignal in which segments that probably contains fire or smoke are highlighted.
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Study of the properties of fillers to the composites requiring high temperature resistance
Vovesný, Václav ; Gross,, Tomáš (referee) ; Bydžovský, Jiří (advisor)
The diploma thesis is focused on the behaviour of natural and synthetic aggregates and their behaviour in polymer – cement composites, while being exposed to high temperature. The processes, happening in aggregates and mortar under the thermal load, were described in the theoretical part of the thesis same as the testing of heat effects on the aggregates and mortar. Further, the influence of high temperature on each component of concrete was described, followed by the suggestion of the appropriate components for concrete exposed to high temperature. Various aggregates were tested in the experimental part of the thesis. The basic physical and mechanical properties of aggregates were examined same as their mineralogical composition with using XRD, DTA and SEM methods. At the mortar, the influence of high temperature on the concrete density, compressive strength and tensile strength was defined. The gained knowledge was evaluated in the final part of the thesis
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Rescue of Persons during the Fires of Hight Buildings
Kulhánek, Jan ; Bíla, Jan (referee) ; Valášek, Rudolf (advisor)
Objective of this work is to process the research of fires in high-rise buildings in the Czech Republic in recent 10 years in terms of their effects, number of evacuated people and rescued persons by fire unites. It evaluates causes of injury and death during fires in high-rise buildings and reasons leading to the use of emergency sources by fire unites. It evaluates equipment in high-rise buildings from point of view of function of safety device against fire and equipment installed for intervention in high-rise buildings and it evaluates negative effects which affect the action of fire unites, especially in terms of evacuation and rescue. It analyses various ways to rescue people from point of view of possiblity using fire unites, the availability of life-saving equipment and the speed of rescue. It makes a design for involvement of forces and sources of other components of integrated rescue system to the process of human rescuing.
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The study of the behavior of track chassis using dynamic simulation
Kukla, Lukáš ; Kašpárek, Jaroslav (referee) ; Jonák, Martin (advisor)
Objectives of the thesis is to develop research summarizing knowledge about the types of tracked undercarriages for existing mobile machines. Developing critical analysis of the various designs of track undercarriages with regard to their use - forest terrain, unpaved surface. Creating a basic structural design of one of the selected type of belt chassis suitable for use in the field. Verification by the design using dynamic simulation.
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Studying the behavior of concrete at high temperatures
Čonka, Ladislav ; Sitek,, Libor (referee) ; Bodnárová, Lenka (advisor)
The thesis is focused on the current issues of concrete resistance to high temperatures. The theoretical part has been processed the changes taking place in the individual components of concrete and changes affecting the physical - mechanical properties of concrete and color-changing effects manifesting high. In the experimental part of the load was, carried concrete test samples to a temperature of 400 ° C, 600 ° C and 800 ° C. After the thermal load, has been on test samples tested changes in physico - mechanical properties, especially concrete compressive strength, water absorption but also a visual assessment of the concrete surface
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