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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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A Study on the Arch-Supported Membrane Structures Resistance to Ponding Effect
Zajac, Zbyněk ; Lang, Rostislav ; Němec, Ivan
This study deals with the ability of arch-supported membrane structures to withstand water accumulation. A previously developed specialized software tool may help prevent the occurrence of the ponding effect already in the design process. The influence of dimensions, surface prestress level and membrane material was investigated. The initial support layout and topology’s influence on the occurrence of the ponding effect was proved. The study outcomes may serve as the basis for the initial dimensions design of arch-supported membrane structures.
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Shear Resistance of Prestressed Beams According to the Different Design Approaches
Baran, Jaroslav ; Borzovič, Viktor
The contribution deals with the shear resistance of prestressed beams and aims to compare experimental results with different design approaches. The experiment included two experimental tests on a sample prestressed beam. The course of the experiment is briefly described in the discussion. The prestressed beam, with an I cross-section, had bonded tendons and a total length of 7.0 m. A detailed description of the beam reinforcement, material characteristic and test setup are included. The reliability of individual design approaches is compared based on the analysis developed in this contribution.
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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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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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Frame bridge
Kapsa, Štěpán ; Velešík, Marek (referee) ; Koláček, Jan (advisor)
The work deals with the design of a single-pole frame structure of a road bridge, which is based deeply on piles. Due to the size of the span of 26 m, additionally prestressed cables are designed in the supporting structure. The structure is analyzed by a three-dimensional bar model and assessed for serviceability and load-bearing limit states in the longitudinal and transverse directions. Part of the design is a study of the influence of supporting the computational model and a comparison of the effect of active and resting earth pressure on the structure.
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Structural assessment of the reinforced concrete chimney
Teplý, Jakub ; Hasala, Ivo (referee) ; Girgle, František (advisor)
The aim of this thesis is assessment of existing condition reinforced concrete factory chimney, who has undergone structural and technical survey, under which was found many failures caused of horizontally tension - significant vertical cracks in the chimney stack. The object of this work will also make appropriate proposals rehabilitation of concrete stack by design prestressed cables monostrand in horizontal direction, grouting open cracks and reprofiling surface of chimney stack.
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