The diploma thesis deal with design of a technological building in Ostrava serving for the sorting of slag to enagle its sequential use. Geometry of the structure was customized to technological requests. Static system was considered in two versions – joint connections with vertical bracing and omni-directional frame. For detail processing was chosen the joint one, besause it showed up as more advantageous. Static calculation was performed by Scia Engineer 14 software, then some typical connections and drawings were manually designed.

The main aim of my master´s thesis was to design a load-bearing steel structure of the lookout tower situated in Brno-Kohoutovice. The height of the load-bearing structure is 35.5 m. My design comprises two different engineering solutions. Solution A is a lattice space frame whereas Solution B works with continuous columns with vertical bracing. For further development, Solution A has been chosen. The proposed structural material is the S355 steel. My thesis includes an engineering report, a statics analysis and drawing documentation.

Item of diploma thesis is project of steel construction with 6 steel silos for storage the grain. The construction is situated inside hall. Silos are high 24 meter and diameter is 6 meter. The load-bearing steel structure for silos is designed in a variant solution. Silos are assessed by ČSN 73 5570 and ČSN EN 1991-4

The content of the diploma thesis is design and assessment of railway station steel structure. It is a two-nave building with a length of 198m. The bigger nave span is 40m and it is 14m high. The smaller nave is 11m high and its span is 25m. The total width of the structure is 65 meters. The main construction material is S355JR steel. The supporting structure of the hall is formed by a curved planar trusses with axial distance of 6 meters. The transverse direction also consists of column that bears two main trusses. The static analysis of the main bearing parts of the structure, including joints and details is processed. The calculation were made in accordance with the Czech technical norms CSN EN.

The subject of my diploma thesis is to design timber and steel variants of riding hall. For static assessment was chosen timber. The hall is a one nave building. The dimensions of ground plans is 35,0 m x 75,0 m and the hall is 11.70 meters high. The load-bearing was formed by a curved glue laminated timber trusses. The building is located in Český Těšín, climate loads are designed for the area. The calculation were made in accordance with the Czech technical norms ČSN EN.

It is an established fact that segregation during casting affects the physical properties of carbon-based ferro alloys; this motivates the study of the segregation behaviour of carbon and carbide-forming solute elements. In this context, this thesis investigates two different situations: the effects of cooling rate and turbulence on the precipitation behaviour of the graphite nodules in nodular cast iron; the nature of carbide precipitation in a bearing steel grade and the effects of subsequent soaking on these carbides. The structures of boiling water reactor inserts cast by the uphill and downhill casting of nodular cast iron were examined. The samples were taken from representative locations in the top, middle and bottom cross sections of the castings. It was observed that in uphill-cast inserts the nodules were larger but fewer in number the bottom section, whereas in downhill-cast inserts the nodules in the bottom section were smaller, but greater in number. Variation in volume fraction of the graphite nodules across the inserts was also observed. The probable cause of this variation was the difference in cooling rate in different sections of the insert. Between the steel tubes located at the central part of the casting, the fraction of graphite was lower, which could be the result of carburization of the steel tubes. To study the effects of melt stirring during the solidification of nodular cast iron, several experiments were conducted at variable cooling rates and for different stirring times. Examination of the microstructure was conducted using Light Optical Microscope (LOM) and Scanning Electron Microscope (SEM). It was observed that during stirring the melt oxidized and oxide nuclei were formed. The number of nucleation sites for the precipitation of graphite nodules increased, which raised the nodule count and the fraction of the graphite precipitated. The matrix transformed from pearlite to ferrite, which could be due to the fact that more carbon had diffused out of the matrix. The segregation behaviour in hypereutectoid bearing steel produced by ingot casting was also studied. The effects of soaking on micro and macro segregation was investigated in samples taken from as cast and soaked ingots; emphasis was laid on the bulk matrix and A-segregation channels. Samples were also taken from ingots which were soaked and then hot worked. The micro and macro examination of the microstructure was conducted using LOM and SEM. Quantitative and qualitative composition analysis was performed using Energy-dispersive X-ray spectroscopy (EDX) and an electron micro probe analyzer (EMPA). It was observed that M3C, M2C and M6C had precipitated. The carbide morphology in the bulk matrix was different to that in the A-segregation channels. All the primary carbides in the bulk matrix were found to have dissolved after 4 hours of soaking at 1200oC. / Det är ett faktum att segringar som uppstår under gjutning påverkar materialegenskaperna hos kolbaserade järnlegeringar; detta utgör motivationen till studien av segringsuppträdandet hos kol och karbidbildande ämnen. Denna avhandling behandlar två olika aspekter inom ramen för detta ämne: påverkan av kylningshastighet och turbulens på kärnbildningen av grafitnoduler i nodulärt gjutjärn samt karbidbildning i kullagerstål och dess påverkan på den efterföljande värmebehandlingen av dessa karbider. Strukturen hos rör till vattenkokare som tillverkats av nodulärt gjutjärn som gjutits med fyllning från botten eller från toppen undersöktes. Prover togs från representativa tvärsnittspositioner från toppen, mitten och botten av de gjutna ämnena. Resultaten visade att användandet av bottenfyllda kokiller gav upphov till större men färre karbider i nedre delen av ämnet, medans användandet av toppfyllda kokiller gav upphov till mindre men fler karbider i nedre delen av ämnet. Variationer av volymfraktionen av grafitnoduler längs tvärsnitten observerades också. Den mest sannolika orsaken till denna variation var skillnaden i kylhastighet i de olika områdena av tvärsnitten. Hos rör tillverkade av det centrala delen av ämnet så var fraktionen grafit lägre, vilket kan bero på en uppkolning av rören. Ett flertal experiment utfördes med varierande kylningshastigheter och olika omrörningstider för att studera inverkan av omrörning av smältan på stelningen av nodulärt gjutjärn. Studier av mikrostrukturen genomfördes med ljusoptisk mikroskopi och svepelektronmikroskopi. Resultaten visade att smältan oxiderades under omrörningen, vilket resulterade i bildandet av oxider. Detta ledde till en ökning av kärnbildningsområden för grafitnoduler, vilket ledde till en ökning av antalet noduler samt fraktionen av grafit som fälldes ut. Strukturen omvandlades från perlit till ferrit, vilket troligen orsakades av att kol hade diffunderat ut från strukturen. Segringsbeteendet hos hypereutektoida kullagerstål tillverkade genom götgjutning undersöktes också. Effekten av värmebehandling på mikro- och makrosegringar undersöktes i prover tagna från gjutna och värmebehandlade ämnen. Fokus var på att studera strukturen i ämnena samt A-segringar. Dessutom togs prover från ämnen som först värmebehandlats och därefter varmbearbetats. Både mikro- och makroundersökningar av mikrostrukturen utfördes med ljusoptisk mikroskopi och svepelektronmikroskopi. Dessutom så genomfördes kvantitativa sammansättningsbestämningar med energidispersiv röntgenspektroskopi och elektronmikroprobsanalys. Resultaten visade att M3C, M2C och M6C karbider hade fällts ut. Karbidmorfologin i huvuddelen av strukturen skiljde sig från den som återfanns i A-segringar. Samtliga primära karbider i huvuddelen av strukturen hade lösts upp efter 4 timmars värmebehandling vid 1200oC. / <p>QC 20180523</p>

In my diploma thesis the proposal is developed as supporting steel structure sports hall with dimensions 45 x 54 m, a maximum height of 15.5 meters,for the area of Znojmo. In a static calculation are designed and assessed the main bearing structural components such as solid panel purlins, spatial lattice truss, bracing and solid panel columns, which together with the truss form create a crosslinks, column bases and anchoring, plus Tribune.The work includes the design documentation consisting of a layout drawing, drawing anchoring and drawing selected details.

The aim of diploma thesis is design and assessment of bearing structure of viewing tower on the mountain Makyta in Javorníky, which is designed from timber and steel. The shape of construction is variable of its height. Diameter of octagonal platform at ground level is 12 m, in the middle of construction is 7,7 m and on the top of the construction is 8,7 m. Viewing tower has 5 viewing platforms – the highest one is covered by roof. Wooden elements are designed from glued-laminated GL24h timber, steel elements are designed from steel of S235 grade. Main support elements of structure are wooden rectangular outer columns and steel circle center column. Total height of construction is 31 m. Static analysis has been accomplished by student version of the SCIA Engineer 2014 software.

The subject of the diploma thesis is design and examination of supporting steel structure of the exhibition pavilion situated at the Brno Exhibition Centre, including a comparison with the second variant. The design emphasis has been placed on keeping the architectural character of building related to its purpose. The structure consists of 11 sections shaped as elliptical arcs, formed by truss frames with variable length of semi-axes, while the largest size (the smallest) is 13 m (7 m) for minor semi-axis and 20 m (14 m) for the main semi-axis, height is 16 m (10 m) and distance of support 38.92 m (25.30 meters). For the analysis of internal forces has been assembled spatial bar shaped model. Cladding is made of Kalzip system.