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Structural Analysis of Steel Members in Fire
Runštuková, Monika ; Kytýr, Jiří (referee) ; Gratza, Roman (advisor)
This thesis deals with solution of steel members under fire conditions. The goal of the thesis is to examine and compare unprotected steel members with steel members protected by different types of passive protection. Calculation is performed according to applicable design standards. ANSYS software is used for thermal and structural analysis.
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Studying the behavior of concrete at high temperatures
Tillová, Jana ; Herka, Petr (referee) ; Bodnárová, Lenka (advisor)
This master‘s thesis is focused on the study of the behavior of cement concrete at high temperatures with a focus on monitoring the impact of aggregate and cement type. This work describes the processes in aggregates and cement matrix at high temperatures. The theoretical part describes the selestion of a suitable aggregate and cement for the surroundings with potential exposure to high temperatures. In the experimental part is given design of composition of a concrete with two types of aggregates and four cements. It has been suggested 8 recipes. Changes were observed densities, compressive strength and tensile strength in bending, calculate the velocity of propagation of waves with ultrasonic pulsed method. Also evaluated the appearance of the surface samples after thermal load – cracks on the surface and measure the maximum crack width.
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The roof structure of the sport hall in Mikulov
Sochorec, Michal ; Barnat, Jan (referee) ; Šmak, Milan (advisor)
Bachelor’s thesis describes design and static assessment of the roof structure of sport hall in Mikulov. Specifically the roofing of the two tennis courts and surrounding stands. Thesis examine several alternatives of design of roof structure like plate girders from glued laminated timber or truss girders made from solid wood. Girders span is 19 m above each tennis court. In the static calculation are assessed individual supporting elements and their connections. The thesis also includes fire resistant report of some elements of roof structure. Static analysis has been accomplished by student version of the SCIA Engineer 14 software.
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Studying the behavior of concrete at high temperatures
Žák, Michal ; Sitek,, Libor (referee) ; Bodnárová, Lenka (advisor)
This bachelor's thesis is focused on behavior of concrete at high temperatures. The theoretical part describes processes, which take place in concrete at thermal loading and further there was described testing of concrete at high temperatures. Next there was described influence of high temperatures on each component of concrete and design of appropriate components for concrete exposed to high temperatures. In experimental part mixes was made with greywacke aggregate, amphibolite aggregate and with the addition of polypropylene fibers. In these mixes was determined the effect of high temperatures on the density of concrete, dynamic modulus of elasticity of concrete and compressive strength of concrete.
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The roof structure of the industrial hall in Kyjov
Nosková, Nela ; Pilgr, Milan (referee) ; Šmak, Milan (advisor)
The Bachelor´s thesis describes design and static assessment of the main roof structure supporting elements of the roof structure of the industrial hall in Kyjov. The hall is designed from timber. The aisle is rectangular floor plan 17,0 x 40,0 m. The main bearing structure causes as a frame truss supported by columns. Solid frame is made from solid timber C24. Purlin is designed from solid timber C24. The static calculation also includes fire resistance reports of single elements. Static analysis has been accomplished by student version of the SCIA Engineer 2012 software.
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Properties of cement composites with fiber reinforcement
Jankech, Filip ; Sitek,, Libor (referee) ; Bodnárová, Lenka (advisor)
This thesis summarizes the knowledge of the possibility of using organic fibres as dispersed reinforcement into cement composites. It is concretely a summary of knowledge about the types and properties of synthetic and cellulosic fibres, their influence on the properties of fresh and hardened cement composite and lastly a description of the fire resistance of cement composites and the effect of organic fibres on the action of those composites at high temperatures and in the presence of fire. The experimental part is supposed to verify the effect of the cellulose fibres on increasing the durability of the cement composite at high temperatures.
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Cement composite materials with polypropylene fibers
Preisner, Martin ; Hela, Rudolf (referee) ; Bodnárová, Lenka (advisor)
This thesis deals with summarizing the possible effects of the addition of polypropylene fibers, especially low temperature plasma treated on the properties of cement composites and concrete. They are given basic information and distribution of polypropylene fibers. It describes the finish polypropylene fiber low-temperature plasma. The experimental part focuses on the effect of dispersion of polypropylene fibers treated plasma in the cement matrix.
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The roof structure of a multipurpose sport hall in Brno
Grussmann, Jan ; Pilgr,, Milan (referee) ; Šmak, Milan (advisor)
Bachelor´s thesis describes the design and static assessment of the main roof structure supporting elements of the multipurpose sport hall in Brno. It is the emphasis on the optimization of the proposal in terms of material consumption. Curved girders made of glued laminated timber and on the edge connected rafters forms together the cross-link structure. Basis of OSB sheathing carrying the roof deck is secured by the orthogonal grid system purlins and rafters. The static calculation also includes fire resistance reports of single elements.
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Pravděpodobnostní přístup k určování požární odolností kombinovaného prutu
Rieger, M. ; Pustka, D. ; Marek, Pavel
Determination of the final fire resistance of composite columns made of concrete filled hollow sections. Calculation is based on achievement of critical temperature on steel tube with respecting section ratio Am/V. Final fire resistance is determined respect to influence of concrete filling, second order stability modeling and fully probabilistic approach. Article demonstrates application of the probabilistic method SBRA (Simulation Based Reliability Assessment) in fire resistant calculation.
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