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Hall for Metal Production with Administrative Building
Kaňok, Vojtěch ; Melcher, Jindřich (referee) ; Karmazínová, Marcela (advisor)
This diploma thesis deals with the design of a metalworking shed with its adjacent administrative center. Both objects are statically independent. The buildings are located in the town of Bučovice. The dimensions of the shed are 54,78x72,58 m. There is an overhead crane situated in the middle wing. The shed‘s height is +11,62 m. The administrative building has L-shaped plan. Its dimensions are 27,62x8,13 m (the wider part is 15,63 m). The design of the administrative object has two variants. Both variants have composite steel-concrete ceiling structure. The heights of the objects are +11,20 m (A variant) and +18,20 m (B variant). For the A variant, drawings were also drawn up with the design and assessment of structural details and anchoring.
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Reliability Analysis of Steel Columns with Encased Web in High Strength Concrete under Compression
Puklický, Libor ; Krejsa,, Martin (referee) ; Melcher, Jindřich (referee) ; Kala, Zdeněk (advisor)
The presented paper deals with a theoretical analysis of the ultimate limit state. The results of experimental research carried out at the Institute of Metal and Timber Structures headed by Assoc. Prof. Karmazinová and Professor Melcher were applied. The geometrically and materially nonlinear solution based on the Timošenko’s solution is verified by the FEM model in the computer programme system ANSYS. The random influence of initial imperfections is taken into consideration. The FEM model also includes the influence of residual stress. In the parametric study, the influence of residual stress on the cross-section plastification is researched into, its influence on the load carrying capacity limit is, together with the influence of other imperfections, the subject of the stochastic analysis, applying the Latin Hypercube Sampling (LHS). Further on, the study proves a direct effect of the concrete part of the cross-section (combination of materials steel-concrete) on the decrease of load carrying capacity limit of the beam caused by influence of the residual stress of steel. With regard to the importance of time dependent phenomena of the concrete creep for the load carrying capacity, the studies given in the Ph.D. thesis are oriented in this respect. The parametric studies of the influence of the concrete creep having applied the Standard Eurocode 2 provide both a comparison of load carrying capacity limits when using common and high-strength concrete types, and also the variability of load carrying capacities. It follows from the comparison of the statistical analysis outputs according to the design reliability conditions of the Standard EN1990 and of the approach of Eurocode 4 that the Eurocode 4 can be recommended for dimensioning of this member type. According to the studies which we carried out, the design in compliance with Eurocode 4 can be evaluated as the reliable one. A larger set of experimental data is necessary to determine the economy.
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Roof structure of sport stadium
Pijáčková, Jana ; Melcher, Jindřich (referee) ; Karmazínová, Marcela (advisor)
The subject of this thesis was to develop a conversion and a variant of the existing steel structure roofing ice rink in Třinec. The building has a rectangular plan on pages 90 m x 60 m, minimum headroom inside the building is given with regard to the requirements of operation. The roof structure is stored in steel and concrete columns around the perimeter at a distance of 7.5 m. Variant solution for the design of new steel roof structure was chosen arc grate. The design consists of 13 main arc lattice girders in the transverse direction for a distance of 7.5 m in the longitudinal direction of the structure consisting of planar lattice strips (girders) and purlins. All this is complemented by a reinforced system. Two dimensions are retained.
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To problems of effective and reliable design of crane girders
Kočařová, Jindřiška ; Juhás,, Pavol (referee) ; Rozlívka,, Lubomír (referee) ; Brodniansky,, Ján (referee) ; Melcher, Jindřich (advisor)
Recently the most often used crane runway beams designed from rolled HEA sections as multispan beams is the topic of this doctoral thesis. It deals with the study of real stress in the cross section focused on local stress analysis in the web of cross section due to eccentricities of wheal load and on the problems of stress analysis above the middle support of multi-span beams. First, the outline of crane supporting structures, currently used methods of implementation and available stress analysis methods are summarized. Than two parametrical studies of crane runway beam design depending on statical determination of the beam, crane span, crane wheelbase and chosen quality of structural steel are presented. Following part of thesis contains the stress analysis of crane runway two-span beam in its continuous part above the middle support on implemented crane supporting structure. Experiment of crane runway two-span beams actions above the middle support are described in the last part of the thesis. Closing part of thesis summarizes results.
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Static verification and variant design of steel structure of administrative building of Gasworks in Brno - Radlas
Štulrajterová, Terézia ; Melcher, Jindřich (referee) ; Karmazínová, Marcela (advisor)
The subject of this master´s thesis is a recalculation of the existing structure, design, static analysis and economic comparison of two variants of this bearing structure of the administrative building Jihomoravská plynárenská located in Brno. Ground plan dimensions and height of both these variants are based on existing disposition of the building. The diameter of the circular floor plan is 16,088 m and height of the structure is 29,46 m. With this new proposal of solution A and B, lower weight of structure in comparison to the existing state has been reached. Both variants have a bearing column in the middle of floor plan and new solution of ceiling structure. The most advantageous from the economic and assembly point of view is variant B. Design of this variant was processed in detail.
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Terminal of Brno International Airport
Jančar, Ondřej ; Melcher, Jindřich (referee) ; Karmazínová, Marcela (advisor)
The aim of the diploma thesis is make a structural design of load carrying steel structure of terminal international airport Brno. The project is designed in two options. The height of the building in highest point is 15 m. The object has rectangular ground floor plan with proportions of 80 x 40 m. For selected option the check of joints and anchorage is performed as well as the design drawings. The object was designed according to currently valid standarts to the ultimate limit states and serviceability limit states.
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Load-carrying structure of assembled family house
Návarová, Michaela ; Melcher, Jindřich (referee) ; Karmazínová, Marcela (advisor)
The subject of this thesis is the static design of load bearing structure of a flat-building. The flat-building is designed as a two-floors building with cock-loft. The ground plan of the house is 15,04 x 16,74 m, the height is 9,25 m. The house is considered as II. snow area and II. wind area. The load bearing structure is designed in two variations. In first variation is designed load baering structure of the house by steel thin-walled sections, in second variation is designed by timber sections. In both variations load bearing structures is made of columns, garlands, ceiling beams and roof truss.
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Steel structures of boiler and engine rooms
Krompolc, František ; Melcher, Jindřich (referee) ; Karmazínová, Marcela (advisor)
A steel construction, divided into two parts, was designed for the building object of a production block of a bio power plant. The two parts separate the boiler room and the engine room. Due to the specific load caused by the operation equipment, also several plateaus, consoles, footbridges and technological constructions were designed. A system of principal pillars HEB, transversely frame-connected with plane solid girders IPE, forms the hall construction. Pillars in rows 1 and 4 are rigidly jointed to foundations. A bearing structure of the roof deck is imposed on the girders. It is composed of a system of purlins – rolled profiles type UPE. The rigidity of the roof is secured by horizontal bracing between the purlins. The construction of the boiler room is attached to the construction of the engine room, which is formed of frame-connected principal pillars HEB in rows 4,7 and 8. The roof truss IPE is designed for 12 900 mm span between rows 4 and 7 and for 4 800 mm between rows 7 and 8. The spatial rigidity of the structure is not only secured by the rigid connection of pillars and foundation combined with the frame-connected roof rungs. It is mainly maintained thanks to the system of vertical wall bracings interacting with the horizontal bracing of the roof. Between the pillar rows B, C, D, E, F and G and 8 to 9 a construction of a substation is attached. In the engine room is situated technological structure. The construction is formed by supporting frames consisting of pillars type HEA, rungs type IPE and HEA and vertical bracing of rolled profiles. Pillars type HEA are connected to foundation using articulated connection. The rigidity of the structure is secured both ways by vertical bracing and by the connection of the plateau beams with the hall girders.
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Sensitivity analysis of stability problems of steel structures
Valeš, Jan ; Vičan,, Josef (referee) ; Kučerová,, Anna (referee) ; Melcher, Jindřich (referee) ; Kala, Zdeněk (advisor)
The doctoral thesis is focused on evaluation of global sensitivity analysis of load-carrying capacity of steel hot-rolled beams. These beams are subjected to lateral-torsional buckling, weak axis buckling and strong axis buckling. Very comprehensive computational models which were both geometrically and materially nonlinear were created in Ansys software using solid finite elements to calculate the load-carrying capacity. The computational models allowed modelling of random initial imperfections such as initial curvature, deviations of cross-section dimensions and steel properties. Sensitivity analysis quantified their influence on the load-carrying capacity. Simulation runs of random imperfections were generated using the Latin Hypercube Sampling method. Since the evaluation of sensitivity analysis of load-carrying capacity of all finite element models would cost an extreme amount of computer time, the thesis aimed at developing a meta-model (also known as surrogate model) based on approximation of FEM model. The approximation polynomial then facilitated the evaluation of sensitivity indices using a high number of simulation runs. At the end, the relationships between the slenderness and the first and second-order sensitivity indices are plotted in graphs. Those random input imperfections that influence the variability of load-carrying capacity the most are pointed out.
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