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Lateral-torsional buckling of steel beams with restraints out of bending plane
Balázs, Ivan ; Vejvoda,, Stanislav (referee) ; Studnička,, Jiří (referee) ; Melcher, Jindřich (advisor)
The doctoral thesis focuses on problem of stability of steel thin-walled beams with lateral and torsional restraints along the spans. Theoretical background of lateral-torsional buckling of an ideal beam with and without restraints preventing out-of-plane buckling is briefly described. In the following chapters the problem of stabilization of steel thin-walled beams by planar members is dealt with. The state of the art in this field is summarized and some open questions are identified. The research in this field could bring new findings about actual behavior of these structural systems. The rate of stabilization can be quantified using values of shear and rotational stiffness provided to a thin-walled member by a planar member. In the frame of the thesis the problem of torsional restraint given to steel cold-formed members by sandwich panels under load is discussed. In case of the uplift load applied on the sandwich panels the torsional restraint should be verified by experimental analysis. To contribute to this field, experimental verification of rotational stiffness provided to steel cold-formed beams by sandwich panels was proposed and performed. Torsional restraint under no external load as well as under uplift load applied on the panels was investigated. The purpose was to obtain the values of the rotational stiffness provided by planar members. The performed tests indicate significant and practically applicable rate of the torsional restraint even in case of the uplift load on the surfaces of the panels. Utilization of the values of the rotational stiffness might result in more economical, effective and reliable structural design. Selected problems were investigated using numerical modeling in a finite element method based software.
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Car dealership with auto repair shop
Wilkonský, Roman ; Vašíček, Vladimír (referee) ; Kacálek, Petr (advisor)
This diploma thesis is being solved for documentation of building in the stage of execution. The building is designed as a showroom with car repair shop. The building site is located in the land registry of Ostrava – Vítkovice. Project documentation is designed accordingly to the valid Czech Republic’s laws, bills and building standards. The building is divided into two objects the first one is showroom with administration and the second one is the car repair shop with washing room and restrooms. These two objects are structurally and operationally connected. The largest plan dimensions are 68,56 x 38,36 m. The building is designed as a reinforced concrete frame in the administrative part and a reinforced concrete wall system in the car repair part. The roof is in both cases realized by using steel trusses. The reinforced concrete frame is lined with aerated concrete masonry. In the roof part it is cladded with sandwich steel panels. The building is founded on reinforced concrete foundation pads with combination of strip foundations. The car repair shop is designed as one floor building, whereas the administrative part is designed as two floor.
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Space structure of industry building object
Pelikán, Adam ; Švaříčková,, Ivana (referee) ; Šimůnek, Petr (advisor)
The subject of this project is the structure of the storage hall which is made of reinforced concrete. It is designed as precast frame (span of 18m), founded on pocket footings. The roof deck (non-rigid) consists of ribbed slabs. The cladding is made of sandwich panels (reinforced concrete and isolation) layed on foundation beam. The design is focused on the single typical frame. Roof girder, column and pocket footing are designed. Designed life of the structure is 50 years.
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Realization of Steel Construction of Workshop Hall in Studenec
Petrů, Václav ; Porwisz, Ondřej (referee) ; Mohapl, Martin (advisor)
This bachelor thesis deals with the construction of a steel structure that will serve as a maintenance hall for agricultural machinery. The building is located on the outskirts of the village Studenec. The bachelor's thesis contains a technical report of the solved object, the situation of construction with wider relations of transport routes, technological regulation for the construction phase of steel structure with item budget, which contains statement of acreage, design of construction site equipment and technical report of construction site equipment, time schedule, design of machine set for steel construction construction. The work deals with the construction of a steel structure, for which quality requirements and their provision are processed. The content of the work is also the safety of the solved technological stage and fire protection of the steel structure.
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Realization of Steel Construction of Workshop Hall in Studenec
Petrů, Václav ; Porwisz, Ondřej (referee) ; Mohapl, Martin (advisor)
This bachelor thesis deals with the construction of a steel structure that will serve as a maintenance hall for agricultural machinery. The building is located on the outskirts of the village Studenec. The bachelor's thesis contains a technical report of the solved object, the situation of construction with wider relations of transport routes, technological regulation for the construction phase of steel structure with item budget, which contains statement of acreage, design of construction site equipment and technical report of construction site equipment, time schedule, design of machine set for steel construction construction. The work deals with the construction of a steel structure, for which quality requirements and their provision are processed. The content of the work is also the safety of the solved technological stage and fire protection of the steel structure.
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AUTOCENTRUM VW GROUP MIKULOV
Běhůnek, Ondřej ; Hudeček, Vladimír (referee) ; Dýr, Petr (advisor) ; Kacálek, Petr (advisor)
The subject of the bachelor's thesis is the elaboration of project for the building permit and for the construction of the VW Car Centre in Mikulov. The documentation follows the study maked during the summer semester of the academic year 2019/2020, within the AG033. The aim of the study was to develop an available, functional, and architectural solution. The bachelor's thesis elaborates this study in detail. The building site is in South Moravia, on the northwestern edge of Mikulov in the former collective farm. The building is connected to the local road by Jiráskova Street, two entrances, connected by an asphalt road around the building. Around road, there are parking areas for visitors and employees, as well as parking areas for serviced vehicles and vehicles intended for sale. The building is divided into several functional units, especially the sale of new cars, with administrative, sale of spare parts with a handy warehouse and authorized service, with facilities for employees and a spare parts warehouse. These units are reflected in structure, consisting of three blocks, different in height, adapted to the requirements for traffic height. In the first, one-floor block, there is a car shop, in the middle, two-floor block, storage and sale of spare parts on the ground floor, the administrative on the second floor. In the third block is the service. The parts are interconnected and thus form one continuous object. From an architectural point of view, the building is based on the surrounding industrial buildings and is flattened with a titanium-zinc overhanging perforated shell. The sun exposure of the building is ensured by curtain walls on the sides of the building, on the second floor by windows. Furthermore, the building is illuminated by skylights. In the interior of the sales and administrative part, there is a dominant steel console staircase, connecting these two units. The building is designed to the principles of barrier-free use.
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Conceptual design of light folding hot-air balloon basket
Zatloukal, Tomáš ; Löffelmann, František (referee) ; Šplíchal, Jan (advisor)
The master thesis examines the design of small folding hot-air balloon basket intended for up to 3 people. It mainly focuses on the conceptual and structural design and their stress-strain analyses. After an initial introduction to the general terms used in hot-air ballooning, the thesis is focused on collecting information about folding lightweight baskets produces nowadays. The part deals with the conceptual design of the basket begins with the requirements. After choosing the method of basket folding, the thesis focuses on the structural nodes of the basket, and it also talks about the design of the burner frame. The penultimate part of the thesis verifies the selected structural designs from a strength point of view. The conclusion is devoted to the mass analysis.
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Car showroom with service
Pavlíček, Jiří ; Nespěšný, Ondřej (referee) ; Pěnčík, Jan (advisor)
The subject of this master thesis is the elaboration of project documentation for the construction of a car showroom & service. This building is located in Brno, cadastral area of city Brno: Královo Pole. It is a detached building without a basement built on a trapezoid shaped area with a flat terrain. Object is divided into two functional parts: the car showroom and the car service. These two parts are constructionally and operationally connected. The car showroom is designed as a two-storey object, which serves as car exhibition, technical and hygienic facilities and mainly the administrative parts of both objects. The car service is designed as a single-storey object without a basement, which serves as a workspace of the car service and a warehouse. The load-bearing structural system of the car showroom is made of reinforced concrete pillars with ceramic masonry. The load-bearing structural system of the car service is made of reinforced concrete pillars with light sandwich panels. The foundation slab consists of prefabricated stepped foundation pad, prefabricated reinforced concrete grade beam and concrete strip footing. Insulation system of the building is made of insulation boards from basalt wool cladding by ventilated facades with perforated steel panels. Insolation in the car showroom is secured by glass curtain wall in combination with plastic windows and doors. Ceiling structures are designed as prestressed ceiling panels Spiroll. Roofing structure of both objects is supported by prestressed reinforced concrete roof girder in combination with trapezoidal sheet and insulation boards from basalt wool and PIR boards. The roof of the objects is flat with ordinary layer order with waterproof layer from softened PVC.
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Analysis of composite sandwich panel under conditions simulating placement on a rocket carrier
Král, Martin ; Horníková, Jana (referee) ; Majer, Zdeněk (advisor)
This work deals with composite sandwich panels, which are currently used as supporting structures for satellites. This type of panel contains an aluminum honeycomb core and two thin laminate coatings, reinforced with carbon fibers. Laminate sandwich panel coatings offer an alternative to conventional aluminum coatings, which is advantageous mainly due to the reduction of weight and increase of the flexural stiffness of the panels. The work is a parametric study of mechanical properties for several variants of the coating of sandwich panels. These are laminate coatings, differing in the orientation of the fibers in the individual layers, as well as an aluminum alloy coating. The study is divided into two parts. The first part examines the deformation-stress response of a sandwich panel, which is simply supported at the edges and loaded with pressure. The response calculation is performed using FEM and verified by the method of sum of an infinite series. The second part investigates the deformation-stress response of the joint, (node) of two sandwich panels, which is loaded by random vibrations, aimed at simulating the mechanical environment of the rocket carrier during the takeoff of the launch vehicle. The response is calculated using FEM and verified by an experiment on a vibrating stool for a selected variant of the laminate coating of sandwich panels. The results of the work can be used for the design of baffle of the X-ray imaging device (SXI), which is part of the equipment of the space satellite of the SMILE project.
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Lateral-torsional buckling of steel beams with restraints out of bending plane
Balázs, Ivan ; Vejvoda,, Stanislav (referee) ; Studnička,, Jiří (referee) ; Melcher, Jindřich (advisor)
The doctoral thesis focuses on problem of stability of steel thin-walled beams with lateral and torsional restraints along the spans. Theoretical background of lateral-torsional buckling of an ideal beam with and without restraints preventing out-of-plane buckling is briefly described. In the following chapters the problem of stabilization of steel thin-walled beams by planar members is dealt with. The state of the art in this field is summarized and some open questions are identified. The research in this field could bring new findings about actual behavior of these structural systems. The rate of stabilization can be quantified using values of shear and rotational stiffness provided to a thin-walled member by a planar member. In the frame of the thesis the problem of torsional restraint given to steel cold-formed members by sandwich panels under load is discussed. In case of the uplift load applied on the sandwich panels the torsional restraint should be verified by experimental analysis. To contribute to this field, experimental verification of rotational stiffness provided to steel cold-formed beams by sandwich panels was proposed and performed. Torsional restraint under no external load as well as under uplift load applied on the panels was investigated. The purpose was to obtain the values of the rotational stiffness provided by planar members. The performed tests indicate significant and practically applicable rate of the torsional restraint even in case of the uplift load on the surfaces of the panels. Utilization of the values of the rotational stiffness might result in more economical, effective and reliable structural design. Selected problems were investigated using numerical modeling in a finite element method based software.
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