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Strengthening study of a reinforced concrete plain girder
Jalůvková, Lucie ; Pinkas, Karel (referee) ; Svoboda, Adam (advisor)
The subject of my bachelor thesis is to analyze existing reinforced concrete plain girders according to the current standards with a variety of strengthening solutions. The roof girders are located in industrial building in Lanškroun in the Pardubice Region. Its original design dates back to 1998, therefore the roof girders were designed according to the standards valid at that time. The strengthening of the roof girders will be designed using additional external prestressing and composite reinforcement followed by verification of the ultimate limit state, serviceability limit state and fire resistance. A digital model for checking the calculation was created using software Scia Engineer. For the verification of the composite reinforcement software Sika CarboDur was used.
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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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Design of reinforced concrete structure with respect to fire resistance requirements
Pivodová, Alena ; Klodner, Jan (referee) ; Perla, Jan (advisor)
The diploma thesis deals with an analysis of internal forces of B4 reinforced construction of an office building. Analysis takes into account interaction with subsoil and when designing structural parts of the building, different requirements for fire resistance of a structure are taken into account. A Dlubal RFEM 5.17 program was used for finite element analysis, and model functionality verification was performer by using a summation of moments method. The thesis deals with the design and assessment of a point-supported slab, column, inner and external walls.
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The issue of concrete resistance to high temperatures
Krejčík, Jakub ; Hela, Rudolf (referee) ; Bodnárová, Lenka (advisor)
Bachelor´s thesis deals with resistance of cement concrete to high temperatures. Theoretical part of bachelor´s thesis describes changes that occures in concrete at thermal loading and behavior of each component of concrete. Next there were discribed ways to improve resistance of concrete to high temperatures, by choosing the right component or by adding fibre reinforcement. In experimental part composites with bassalt and polypropylen fibre and with bassalt aggregates were tested. In these composites changes of compressive strenght and changes of density were mesured according to the thermal loading. Next individual fibre reinforcement polypropylen, celulose and bassalt fibres were exposed to the thermal loading and their changes were observed.
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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 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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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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