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Strengthening of roof girders in production hall
Wawreczka, Karel ; Strnad, Jiří (referee) ; Klusáček, Ladislav (advisor)
The aim of my bachelor’s thesis is strengthening of girder roof construction in a production hall. The roof girders were designed 18 years ago in accordance with the Czech standards valid at that time. All the girders are now recalculated according to valid European norms. It is suggested to use prestressed cables guided along the girder construction. Because of the lack of space around the front of girders, it is designed to use prestressing from in the middle. In order to design the cable geometry and the biasing force, it was crucial to take into account shear resistance as well as constraining compressive stress in the concrete. Calculation of the effects of load is carried out by Scia Engineer 2015 computer software whereas Excel has been used for all the other calculations.
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Bridge on a ramp in Brno
Vančura, Lukáš ; Pachl, Radek (referee) ; Panáček, Josef (advisor)
The topic of the thesis is the design and assessment of roadway bridge structure, which is curved in the horizontal plan with a very small radius. Bridges is part of the flyover crossing in Brno. There are designed two variations of which are further developed the variant of the two-chamber cross-section. Calculations and assessments are conducted in according to the valid European standards (Eurocodes). The static calculation is supplemented with a clear technical drawings and visualizations.
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Calculation of Prestressed Concrete Beam
Vítek, Filip ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
This thesis is focused on the description of the calculation of prestressed concrete beams. The introductory chapter discusses the bias and distribution of prestressed concrete. The second chapter describes materials used for the production of prestressed concrete and its characteristics. The following chapters describe the calculation of changes of prestressing and their effects on the structure, prestressing methods and a limit state where the prestressed concrete is controlled. A model example of calculation is shown in the last chapter.
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Bridge on I/38 road.
Novotný, Tomáš ; Pachl, Radek (referee) ; Panáček, Josef (advisor)
The final thesis is focused on design of valley bridging on I/38 road at the Havlickuv Brod bypass. The thesis contains study of the bridging area. For detailed assessment was chosen, from three variants, a two-beam cross-section girder of 4 spans. Load-bearing structure is designed as cast-in-place, post-tensioned, concreted at fixed falsework without phased construction. The serviceability limit state and the ultimate limit state were assessed. The thesis contains, apart from structural design, drawings and visualizations of the bridge.
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Roof of the swimming pool
Pelikán, Adam ; Šopík, Leonard (referee) ; Stráský, Jiří (advisor)
This diploma thesis is about designing the structure of roof of swimming stadium. Three solutions are created - concrete arc with tie, steel truss slab and concrete pretensioned membrane. One choosed solution - concrete pretensioned membrane - is afterwards developed. In the beginning there are several designs of geometry fulfilling the requirements for given type of structure being created. In part of static calculation, the parametrical mathematical model in form of macro in APDL language for Ansys software has been created. Afterwards all the parameters (initial state of cables, level of pretension, dimensions of membrane and peripheral frame, etc.) has been optimized in order to the membrane be fulfilling criterias for ultimate limit state and serviceability limit state. Afterwards other selected parts of structure has been checked. On basis of designed geometry and design checks in static calculation the drawings of conctruction and designed parts has been created. In the end, the 3D model of the structure has been created in graphical software Rhinoceros. Then visualizations of structure in concstruction stages and after completion has been rendered.
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Prestressed road bridge
Pokorná, Šárka ; Jaromír,, Rušar (referee) ; Panáček, Josef (advisor)
The subject of this thesis is the design and assessment of a prestressed bridge structure. Two studies of the bridging were created. The selected variant is a continuous post-tensioned single-frame structure with three spans. The total theoretical span of the bridge is 100,0 m. The bridge is to be constructed in its entirety using a falsework. The structure has been assessed for serviceability limit state and ultimate limit state according to the relevant standards.
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Bridge over a local road
Kováč, Daniel ; Mojzík, Petr (referee) ; Nečas, Radim (advisor)
This master thesis is focused for design, respectively for creating counterproposal of existing structure of Motorway Bridge located at D1 motorway between Jánovce and Jablonov in district Levoča in Slovakia. This bridge is over a local road. The main aim of this thesis is design, analysis and assessment of bearing elements of bridge deck. For purposes of this thesis was created three variants of bridge deck. Detailed analysis was performed on bearing construction from post-tensioned precast beam with monolithing concrete slab. Two mathematic models were used for analysis of chosen variant. First model was spatial 3D shell construction. The purpose of this model was determinate cross spreading line of other constant load and live load. Second, flat 2D model, was for determination creep and shrinkage appeared from long-term load. These effects were observed in at advanced defined time nodes. Outcomes from upper mentioned model were used from design and assessment of bearing elements of bridge deck, design prestressed reinforcement cables and concrete reinforcement rods.
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Bridge on a motorway
Lindtner, Tomáš ; Řehulka, Martin (referee) ; Panáček, Josef (advisor)
The subject of Diploma’s thesis is the design of a road bridge on the R1 expressway, at km 1,293 above the road III/51311. The main content is static calculation of supporting structure consisting of four spans. Four studies were processed and the first variant of double-girder monolithic structure was chosen. The range of spans is ranging from 25 m - 30 m. Double-girder consists of two post-tensioned concrete beams and reinforced concrete slab. Static models and load effects are solved in Scia Engineer. Bridge is located in the horizontal curvature, however, compromise was elected (because of small curvature), assessing the upright design. Calculation is made without effects of temperature, wind loads and horizontal forces causing by traffic.
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Reconstruction of the bridge in the town Ledeč nad Sázavou
Lidmila, Ladislav ; Krejčík, Vladimír (referee) ; Klusáček, Ladislav (advisor)
Diploma thesis deals with reconstruction of old beam bridge in town Ledeč nad Sázavou. Three variants of reconsttruction were done. Detailed structural design report was done to one of them, streithening with post-tensioning. Calculation of load effect was solved with finite elemet method via software on grillage model. Construction was checked on ultimate limit state and serviceability limit state. Necessary drawings were elaborated to chosen method.
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Reconstruction of the concrete bridge in Raškovice
Muroň, Vlastimil ; Pinkas, Karel (referee) ; Klusáček, Ladislav (advisor)
The aim of the bachelor thesis was designing reconstruction of old beam bridge in Raškovice. Unfortunately the documentation wasn't preserved, it was necessary to estimate reinforcement according to the standard ČSN 1230-1937, according which the bridge was designed. The structure was reinforced with a new composite plate and post-tensioning. Design procedures and assessments were performed in accordance with ultimate and serviceability limit state according to valid European standards. Calculation was performed in the SCIA Engineer 19.1. program on beam model of one beam. The thesis include necessary drawings.
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