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REINFORCED CONCRETE TANK
Beran, Jakub ; Jeneš, Rostislav (referee) ; Šulák, Pavel (advisor)
The aim of the bachelor thesis is a static design of an reinforcement tank. The internal forces are calculated by FEM programme Scia Engineer 16.1 with a SOILIN modul interacting with a subsoil model. The internal forces are verified by a manual calculation. The load-bearing elements are designed with these forces. The structural assessment report is designed to ultimate limit state and service limite state – service limit state of crack. Another report considers ground water occurring. The static report deals with different time of concreting foundation slab and walls. This is the reason why shrinkage is very important for internal forces and their values. The objective of the project is to design the tank without cracks in concrete. The limit width of cracks is wk= 0,3 mm by EC 1992-1-1.
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Design of the concrete sewage plant
Štramberský, Martin ; Strnad,, Jiří (referee) ; Zich, Miloš (advisor)
The subject of my bachelor's thesis is a static design of a sewage plant reservoir, dimensioning and examination of the construction part for Capacity Limit State and Applicability Limit State. Design documentation is included in the project. The aim of this thesis was to design the reservoir in such a way that there would be no cracks in the concrete. The calculations were carried out in accordance with Eurocode 2.
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Analysis of fracture of quasibrittle materials using numerical modelling and acoustic/electromagnetic emission
Vodák, Ondřej ; Vořechovský, Miroslav (referee) ; Veselý, Václav (advisor)
This master thesis gives overview of non-destructive tests of concrete and provides detailed information concerning the acoustic and electromagnetic emission during monitoring of concrete failure. Conducted loading tests of plain concrete specimens are described in the thesis together with the performed numerical simulations of these tests in the software ATENA. The simulation results of concrete failure are analysed in detail and compared with the experimental results recording failure processes with the help of acoustic and electromagnetic emission. The majority of simulation results in software ATENA 3D show good agreement with the recorded data.
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Technical survey of the family house
Odstrčil, Štěpán ; Láník, Jaromír (referee) ; Schmid, Pavel (advisor)
This bachelor’s thesis deals with diagnostics of one object divided to 4 residence units. Technical construction resarch had to be made due to owned wants knock down his residence unit and build a new family house instead o fit. Object is located on the street Žebětínek 17 in Brno-Medlánky. Resarch includes enumeration of all damages before demoliton o rafter that, diagnostics of object wich is being demolished and consequences of demolition to buildings nearby.
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Methods of Technical Diagnostics
Klusáček, Stanislav ; Ďaďo, Stanislav (referee) ; Němec, Zdeněk (referee) ; Tůma, Jiří (referee) ; Bejček, Ludvík (advisor)
The main objective of the presented thesis is to contribute to the development of diagnostic methods for piezoelectric sensor testing. The thesis describes the methods for piezoelectric sensors microcracks identification and diagnostics. The core of the thesis presents the development of a knock sensor prototype, design of suitable methods for the knock sensors diagnosis and evaluation of developed methods with focus on detection of microcracks in the sensor piezoceramic. The last part of the thesis deals with the influence of cracks and splits on the measured data from the piezoelectric transducer. The presented methods are focusing on impedance measurements and sensors frequency response measurements. Known properties of used piezoelectric material as an information source for measurement and diagnosis are provided. The main result of the work is the evaluation of the methods developed for the piezoelectric sensors self-diagnosis.
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Sewage pumping station
Čožík, Martin ; Perla, Jan (referee) ; Strnad, Jiří (advisor)
The subject of my bachelor’s thesis is static design of a sewage plant reservoir, dimensioning and examination of the construction part for Capacity Limit State and Applicability Limit State. Design documentation is included in the project. The aim of this thesis was to design the reservoir in such a way that there would be no cracks in the concrete. The calculations were carried out in accordance with Eurocode 2.
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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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Diagnosis of defects of an existing object
Niedoba, Jakub ; Láník, Jaromír (referee) ; Schmid, Pavel (advisor)
This bachelor thesis deals with structural and technical research of the Lužánky Leisure Time Activity Centre, a civic amenity building situated in Brno, 50 Lidická Street. A building diagnosis was carried out due to a number of static defects spreading fast all over the structure. The first part of the thesis describes the history of the surrounding Lužánky Park. Furthermore, the history of the city’s watercourses and the related issue of clay soil are also discussed. The practical part focuses on the diagnostics of the building together with its current state. After the theoretical assessment, short-term as well as long-term maintenance measures are proposed.
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Effect of Cement Bypass Dust on Cracking Tendency of Alkali-Activated Slag during Drying
Krejčová, Marie ; Švec, Jiří (referee) ; Bílek, Vlastimil (advisor)
This bachelor thesis deals with the influence of bypass cement dust on cracking of alkali activated slag. Significant shrinkage and cracking prevent greater use of alkali activated slag. The length changes and strength of the mixtures with different amount of bypass cement dust were measured at various curing conditions. In these mixtures, cracks were observed and their amount was evaluated by image analysis. It has been found that the addition of dust can reduce the amount of cracks. Treating the prisms in a humid environment leads to a reduction of cracks, especially during long-term treatment. In order to improve flexural and compressive strength, it is preferable to use dust as a replacement for part of aggregates and not as a partial slag replacement.
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Waterproof concrete structures and regulations for the design and implementation
Křenek, Daniel ; Brožovský, Jiří (referee) ; Hubáček, Adam (advisor)
This thesis covers the issues of design, production, and property testing in regards to waterlight concrete structures. The testing conducted on the properties fit in accordance to the Czech Republic and international regulations. This thesis covers the issues of design, production, and property testing in regards to waterlight concrete structures. The experimental part focused on the design of the concrete mix, which stems from previous knowledge of individual, and speific regulations. Various types of cement were particularly examined along with studying the effects of admixtures that were partially replaced by cement with propoerties of watertight concrete
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