|
|
Structural analysis of austenitic weld joints
Procházka, Robert ; Foret, Rudolf (referee) ; Havlík, Petr (advisor)
The bachelor thesis deals with structural analysis of austenitic weld joints by using methods of material science. The theoretical part of the thesis summarizes the problematics of welding of high-alloy steels. After the general definition of welding and weldability of high-alloy steels, the thesis focuses on structural adjustments including welding defects during the welding process. Selected methods of fusion welding that were used to create these welds are mentioned in the second half of the theoretical part. The experimental part covers the structural analysis of the welds, which consists of microstructure evaluation, chemical composition analysis, and microhardness test.
|
|
|
Glasshouse
Sejbalová, Kateřina ; Šmak, Milan (referee) ; Barnat, Jan (advisor)
This master thesis deals with design of a load-bearing steel structure, i tis located in ZOO Zlín areal. The building serves as a glasshouse. It is a single-storey building with circle plan, 39,04 m diameter and 15,63 m height. Space construction follows spherical cap of a sphere with diameter 40 m. Variant A building is design as a fuller dome. Variant B building consists of hexagons, which are getting smaller with height, at the upper part is the hexagonal geometry cancelled and geometry made from triangles follows. This thesis contains design of a pedestrian bridge, which carries all technical loads. The thesis contains static report of the beams a design of main joints.
|
|
|
The production of the console deburring machines
Hlavinka, Martin ; Daněk, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
This thesis submitted deals with the project of the change of the production of the semi-finished product of the console which is produced by casting from the cast iron ČSN 42 2420. The component forms the frame of the deburring machine with two electric motors with the gearbox. For the suggested production the method MAG of technology welding was chosen. Because of the given technology the new construction of the component was chosen. The welded product consists of eight parts burnt from heavy-walled sheet metals. The suggested material of the construction is steel S235JR and for welding the filler rod Weld G3Si1, diameter 1 mm is chosen. For the determination of the optimal parameters of welding the testing through the slap next to the skin weld (size a5) was made. Simultaneously with the testing the fracture areas and the weld root were examined. The suggested parameters of welding were used during the preparation of WPS. For the assembling of the component the operating schedule of welding is planned.
|
|
|
Trade House in Brno
Serbousková, Kateřina ; Sýkora, Karel (referee) ; Barnat, Jan (advisor)
The final thesis deals with the design of the steel loadbearing structure of the shopping center situated in Brno. The built-up floor area is 1973 m2 (L-shaped ground plan with dimensions 48 m x 50 m). The construction consists of three parts. Building A has four above-ground floors and reaches a height of 25.5 m. The steel structure of mono-pitched roof is designed in two options. Both options consist of full-length purlins and truss girders. Building B is a single-storey building with a mono-pitched roof top reaching 8.1 m high. Building C is three-storey with a flat roof. The first floor has a construction height of 4.5 m and the remaining two floors reach height of 3.6 m, which coincide with building A. The steel structure is made of steel-concrete composite ceilings and pin-supported columns. In the case of bracings, pressure was eliminated by means of non-linearities.The work includes proposal, assessment of the supporting structure and calculation of the directional details. Internal forces were determined based on a static analysis in the SCIA Engineer calculation program.
|
|
|
Steel structure of a business centre
Kočí, Petr ; Pilgr, Milan (referee) ; Štrba, Michal (advisor)
The diploma thesis elaborates on the proposal of a loadbearing steel structure of a shopping centre. Four-storey building has total lenght of 88 m, width 48 m and its base structural grid is 8 x 8 m. The total height of building is 25,4 m. First three floors above ground are designed with structural height of 5,6 m whilst the 4TH floor uses height of 4,0 m. Frame structure is formed by primary beams and castellated secondary beams. Above 4TH floor, the roof structure is designed in two alternative versions, both using solid purlins and truss girder. The 3D computer animation of the building is also part of thesis. The shopping centre that is subject of the final thesis is located in Brno area.
|
|
|
Industrial building
Kočí, Petr ; Buchta, Stanislav (referee) ; Sýkora, Karel (advisor)
Bachelor thesis deals with proposal of a load-bearing steel structure of a single-bay hall in accordance with the space arrangement of the building with span of 24 m, length of 63 m and 8,7 m height of a modular crane cantilever. Two bridge cranes are designed with a load capacity of 12,5t and 32/8 t. Essential load-bearing element of the building are transversal frames designed in 12m distance formed by truss girder and solid columns cantilevered at the plane of a transversal main frame. Roof panels are fixed onto the parabolic purlins. Hall is located in the Ustí nad Labem region.
|
|
|
Steel structure of an industrial building
Kopecký, Ladislav ; Pilgr, Milan (referee) ; Sýkora, Karel (advisor)
Industrial hall with storage outbuilding. The length of the hall is 72 meters and width of 30 meters. The main hall has a span 24 meters and the outbuilding has a span 6m. The distance between primary steel frame is 6 meters. The height of the main hall is 10.7 meters and a height of outbuilding is 13.0 metres. The roof is flat with roof slope of 3.5% the main hall and 8.75% outbuilding. The structural system of the hall's bar structure. Primary steel frame is designed as a steel frame rafter with eaves haunch. In the roof structure are designed purlins. The stability of the structure is secured by roof braces and longitudinal braces. The hall is pin-supported on the foundation pad. The hall is clad wall and roof panels PUR. Main hall is equipped with a bridge crane with capacity of 8 tons.
|
|
| |
|
|
Lifetime Prediction of the Welded Ribbed Generator Shaft
Ryšánek, Michal ; Pokorný, Pavel (referee) ; Majer, Zdeněk (advisor)
This master thesis deals primarily with the prediction of fatigue life of welded ribbed shaft. Recommendations taken from the International Institute of Welding (IIW) are used to express the stress values and the fatigue life. The stress values of examined place are expressed by approach of nominal stress, structural hot spot stress and effective notch stress. Results from stress-strain analysis are combined together with fatigue strength curves for prediction of the fatigue life. At the end of the analysis, the predicted fatigue life is compared with design life of welded ribbed shaft.
|
|
|
Welding of USIBOR 1500 steel by YbYAG fiber laser.
Bogar, Radek ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
The use of high-strength steel is more and more frequent in the car industry. I focused on USIBOR® 1500 steel welded by Nd-YAG laser. For my experiment, there were used various welding parameters and shielding gases. To compare the weld samples, I used the tensile, bending, macrostructure, microstructure and Vickers hardness test with different combinations of thickness as well as welded material.
|
guest ::
