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Arch pedestrian bridge over the road
Śmigová, Marie ; Nečas, Radim (referee) ; Koláček, Jan (advisor)
This work deal with the design of a footbridge over a four-lane expressway. At the place where the footbridge is going to be designed is a bedrock in a great depth. Two preliminary variants were created, from which was selected the variant of the arched footbridge. Arched footbridge is a self-anchored structure consisting of a supporting reinforced concrete arch and prestressed bridge desk. For this footbridge was elaborated a more detailed study, static calculation and drawing documentation.
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Analysis of strut frames structure using the tensegrity principle
Marek, Martin ; Lukáš, Petr (referee) ; Jadrná, Lucie (advisor)
This bachelor thesis focuses on strut frame structures using the tensegrity principle. It outlines a theoretical introduction to strut frame structures with an explanation of basic conditions of strut frame structure existence. It further describes the basic theory of strut frame structures using the tensegrity principle, their characteristics and their advantages and disadvantages. In the research section the occurence of biotensegrity in nature and human anatomy is presented. A description of use of tensegrity in practice is also presented. After the research section a computational section follows, this section contains basic thoughts used in the 2D model such as the considered materials and the strut frame geometry. A numerical computation in the ANSYS simulation software and an anlytical computation in MATLAB is presented. Last, a numerical computation of a 3D strut frame model with the tensegrity principle is described.
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Adaptive setting of ball screws in milling CNC machining centers
Sedlák, Václav ; Pavlík, Jan (referee) ; Marek, Jiří (advisor)
This bachelor thesis deals with the structural design of a mechanism that provides adaptive ball screw mounting for CNC milling machining centres. First, a research of the current state of the art is carried out, then three design variants are proposed based on a system analysis. Next, an optimal variant is selected and two solutions are proposed to cover the widest possible range of needs of CNC machining centers. After the technical calculations, 3D models and accompanying technical documentation were created.
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Defects of the bridge expansion joints - durability and expected lifetime
Daňa, Jan ; Ing.Ladislav Šašek, CSc. (referee) ; Pošvářová, Miloslava (advisor)
This thesis discusses the types of bridge expansion joints certified for use in the Czech Republic and their disorders. The first part was a theoretical evaluation of expansion joint failures. The second part focused on clarifying the failure of anchor bolts at the cantilever expansion joint. On the basis of determining the cause was then designed a method for determining the durability of expansion joints. Prognosis life cycles corresponds records according to administrator- repair works.
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Motorway Viaduct
Polách, Marek ; Šopík,, Leonard (referee) ; Stráský, Jiří (advisor)
The thesis is a design of a bridge crossing the valley of the Hrabyňka creek as a part of road I/II. Firstly, three possible structures are designed and according to their advantages and disadvantages, the best of them is selected. In this case a cable stay bridge was selected. Following is a design of span lenghths, collumn heights and the cross-section. Then the loads are detremined and applied on a numeric model cretaed in software working on the basis of FEM. In continuation internal forces are calculated and their propriate combinations for service limit stay and ultimate limit state with time dependent analysis taken into account. In the end the reinforcement steel is designed for one part of the structure. Detailed drawings are also part of the thesis.
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Pedestrian bridge in Příbor
Škrachová, Ivana ; Nečas, Radim (referee) ; Koláček, Jan (advisor)
The subject of the bachelor thesis is about a concept of pedestrian bridge across the river Lubina in city Příbor. For final design of pedestrian bridge was made three preliminary designs of constructions and one of them was choosen for detailed processing, assessment and making drawings. The choosen variant is made as prestressed concrete's beam with parapets. For calculation of internal forces was used Scia Engineer Software. Assessment was made by method of ultimate and serviceability limit state. A process of constructio's works are not going be treated in this work.
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Bridge on the I/11 road
Jedlička, Martin ; Pachl, Radek (referee) ; Panáček, Josef (advisor)
Aim of this thesis is to design a concrete road bridge over a Neborůvka stream and surrounding valley. This bridge is a part of I/11 road. Three preliminary designs with focus on girder bridge solution were made. As a most suitable variant was chosen two gilder beams variant. For this variant was made a static calculation concerning TDA. This design was made according EC. As a construction method was chosen classic construction with falsework. Design was made in Midas Civil and Dlubal RFEM calculation software. As a next step a drawing documentation was made as well as construction time plan and bridge visualization.
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Highway box girder bridge
Ondrůšková, Kamila ; Nováček, Jan (referee) ; Zich, Miloš (advisor)
The subject of the diploma thesis is the bridging design of the valley and Doľanský potok on the D1 motorway in the section Jánovce - Jablonov in Slovakia. Three variants of bridging have been designed and then compared. A post-tensioned construction of the box girder cross section was chosen as the most suitable variant, which was further checked. The static calculation was drawn up according to European standards.
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Static provision of baroque church
Kadlec, Jaroslav ; Šiška, Radek (referee) ; Strnad, Jiří (advisor)
The master´s thesis solves a static provision of the Baroque church of Saint James in Městečko Trnávka. The church was built in 1752 in Baroque style on the place of the original Romanesque church. It is a single-nave building with dimensions of about 46 × 20 m. The nave is followed by a massive square tower with a height of about 34 m. The reason for the restoration of the church are cracks in the external masonry and arch due to small space stiffness. The building will be reinforced by horizontal and transverse prestressing. They are designed prestressing tendons, called monostrands, using method of alternative cable channels. It will help to avoid other derformations and it will increase a stiffness of the structure.
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