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Cable-stayed bridge across the River Morava
Damek, Martin ; Páleník, Petr (referee) ; Nečas, Radim (advisor)
The subject of this master thesis is a design of a bridge for pedestrians and cyclists across the river Morava in Olomouc. Within the scope of thesis there are 3 studies of bridges. Cable-stayed bridge with prestressed spine beam was found appropriate and further calculations were assessed. Static calculations of prestressed spine deck and reinforced concrete pylon were made. Eigen frequencies and modes of construction were obtained. Internal forces were provided by SCIA Engineer with effect of non-linear parameters. Calculations were made according to valid standards and regulations.
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Cable supported bridge
Kolář, David ; Koláček, Jan (referee) ; Nečas, Radim (advisor)
The topic of this bachelor thesis is design of a footbridge across a river. The final version, which has been chosen from three designs differentiating in their static behaviour of the structure, is a cable-stayed footbridge. The chosen option is designed as a parabolic monolithic prestressed deck suspended by cables anchored to two cone shaped pylons. The structure is situated perpendicularly to the riverbed and its total length is 57,465 m. Softwares, such as SCIA Egineer 20.0 and MS Excel, were used for the calculations of internal forces and modelling calculation models and its verification by hand. The design of the prestressing force, assessment of utility limit state and serviceability limit state were done by hand according to valid standards and regulations. Partially simplified bearing capacity assessment of the pylons was solved by IDEA StatiCa 9 software and some of the results were verified by hand as well. The thesis disregards stages of construction and prestress losses are estimated.
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Steel foot-bridge
Pauer, Jan ; Barnat, Jan (referee) ; Štrba, Michal (advisor)
The diploma thesis describes the design and assessment of steel footbridge for pedestrians and cyclists across the river Svratka in Brno. As the main material of structural elements was used steel S355. In the beginning is deal with two variants of structural system, which are compared with each other and the better variant is chosen. The main structural system of chosen variant consist of two parabolic arches bend down to each other on which is suspended by suspenders intermediate deck. The deck consist of two steel beams with floor beams and composite cencrete slab. The span length is 50 m.
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Pedestrian bridge over the Jihlava river in Třebíč
Vavřička, Lukáš ; Velešík, Marek (referee) ; Koláček, Jan (advisor)
The bachelor thesis deals with design of concrete pedestrian bridge over the Jihlava river. At the beginning two variants were created, one of which was future postprocessed. The cable-stayed construction, whose main support part is created by two pylons fixed to post-tensioned bridge deck, is pin-supported on abutment. Suspension of the deck is implemented by cables pin joined to the top of towers and sides of the deck. Material of the main concrete load-bearing structure is concrete C45/55. The steel elements of structure are made from steel S355, suspenders are designed with steel Macalloy 460. The structural assessment report was processed mostly by hand calculation with use of program MS Excel, for structural check of pylon use of program FIN EC beton was chosen. The load calculation was performed with program Scia Engineer. The drawing was created in AutoCAD software and the visualization in Lumion.
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Analysis of design variables of prestressed concrete structures using optimization algorithms
Dlouhý, Lukáš ; Navrátil, Jaroslav (advisor)
During recent years more and more emphasis has been put on saving and ecological aspects of the civil engineering industry. As the total volume of concrete being produced on our planet is immense (ca 1010 tons per year), the possibility of decreasing it by even a small percentage can bring large savings in material costs, transport and other costs and reduction of CO2 production and other pollution. Therefore, optimal analysis of design variables of concrete structures appears to be of high importance. Optimization is finding the best solution to a given problem. Many disciplines define different optimization problems and it is typically the minimum or maximum value of the objective function that is searched. It is known that mathematical procedures and algorithms to find an optimal structural design are used in practice in mechanical engineering, but the use of these tools in civil engineering is rather exceptional. Generally, scientific works deal with the optimal design of structures only. Finding of an optimal shape and dimensions is usually a question of the engineer’s experience and good “guess”, which is then verified by calculation. There are many reasons explaining why optimization in common practise is used only occasionally. One of them is the absence of proper user friendly software tools which could help within relatively short time available for structural design. Another reason is the complexity of optimization tasks as well as a lot of constraints in civil engineering design codes. Last but not least, the change of design variables of buildings, bridges and structures of special types do not express regular response. This issue is discussed in the submitted work.
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One span cable-supported bridge
Kučerka, Ján ; Koláček, Jan (referee) ; Nečas, Radim (advisor)
The theme of this bachelor thesis is the design of a footbridge across the river. The design is processed by two options. The chosen option is designed as a cable-stayed construction supported by cables. Bridge is designed as perpendicular with total length 66,225m. Superstructure is made by prestressed monolithic deck suspended by cables from sloping pylon. Considerable part of the thesis is devoted to creating a so-called initial state. The calculation of internal forces was done by calculation software Scia Engineer 2018. The design of prestressing force, assessment of ultimate limit state and serviceability limit state were done by hand according to the valid standards and regulations. Bearing capacity assessment of pylon was solved by IDEA StatiCa 9 software and some results were verified by hand. The thesis disregards rheological effects and stages of construction.
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Pedestrian Bridge
Hibš, Daniel ; Kocourek,, Petr (referee) ; Stráský, Jiří (advisor)
This diploma thesis deals with the design of a new bridge construction over a multi-lane communication. The converted road is a pedestrian and biking trail connecting significant agglomerations. Three studies were worked out in this thesis and the C variant was selected for further detailed processing. It is an unsymmetrical suspended bridge with a cast-in-place deck. In the section above the communication, the bridge is made up of prefabricated segments. Suspension of the structure is made of two sloping pylons forming a V-shape. The analysis of the construction was carried out in the MIDAS Civil program, where a complete model of construction was entered, including a subsequent estacade. The model describes the construction process and includes creep and shrinkage of the concrete. The traffic, temperature and wind loads were used. The design was assessed for the ultimate limit states and serviceability limit states. The assessment was carried out in the IDEA StatiCa program, supplemented by manual calculations. The static calculations also include assessment of the harmonic response. Subsequently, overview drawings, detailed drawings and visualizations were developed.
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Footbridge over the Berounka river
Pejčoch, Karel ; Kulhavý,, Tomáš (referee) ; Koláček, Jan (advisor)
THE OBJECT OF THE MASTER THESIS IS TO DESIGN OF SUPPORTING STRUCTURE OF PEDESTRIAN BRIDGE SITUATED OVER THE RIVER OF BEROUNKA. THE THESIS CONTAINS STATIC ANALYSIS OF THE CABLE-STAYED BRIDGE WITH TWO FIELDS, WHICH WAS CALCULATED IN THREE VERSIONS .THE CHOSEN VERSION OF THE BRIDGE CONSIST OF MONOLITIC AND PRECAST CONCRETE BRIDGE DECK, WHICH IS CONSTRAINED USING PRESTRESSED CABELS AND SUPPORTED BY HANGINGS.THE CALCULATIONS OF THE LONGITUDINAL WAS PERFORMED BY COMPUTATIONAL SOFTWARE OF SCIA ENGINEERING 15.1
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Steel construction of the footbridge
Ujházy, Denis ; Barnat, Jan (referee) ; Štrba, Michal (advisor)
The content of this diplom is about design and assesment of a steel footbridge for pedestrians and cyclists across the river Ostravice. In an introduction of the work are compared two possible options of footbridge structures.and then the appropriate one is processed in detail. The chosen variant is made of two parabolic arches tilted to each other on which is suspended deck by suspenders. In a static aspect the main loadbearing beams are two-hinged arches. The bridge deck consists of two steel beams and floor beams which are composited with a reinforced concrete slab. The span length is 80 m and archs camber is 9,12m. The main material of the structural elements is steel S355.
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Footbridge
Londa, Jan ; Barnat, Jan (referee) ; Štrba, Michal (advisor)
The diploma thesis deals with design and assessment of pedestrian and bicycle footbridges across the river Moravia in Olomouc. The main material used in the design is S355 steel. At the beginning of the thesis, two variants are compared, from which one is subsequently selected for a more detailed design and assessment. The main supporting element of the selected variant are two parabolic arcs inclined to one another, on which the coupling of the intermediate bridge is suspended by means of the rods. The construction span is 54m.
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