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Numerical analysis of selected silicate based composites shrinkage
Drbušková, Magdaléna ; Vlk, Zbyněk (referee) ; Keršner, Zbyněk (advisor)
The thesis is divided into two main parts. In the first theoretical part is described the problems of shrinking including a comparison of Czech standard and Model Code 2010, Vol. 1. The second practical part of the master`s thesis is focused on the numerical analysis shrinkage primarily on the initial stage of this process. The experimentally obtained data are set approximations of the relative deformation using ShrCeC. Subsequently the numerical simulation of shrinkage of selected silicate specimens using a computer applications SpatiDist and FyDiK 2D. The real test specimens are modelled as two-component composite consisting of cement paste and aggregates. The result is a parametric study takes into account the influence of type and size of grain aggregate.
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Static analysis of suspension bridge variants
Zavřelová, Michaela ; Martinásek, Josef (referee) ; Vlk, Zbyněk (advisor)
The bachelor's thesis deals with the static analysis of individual models of suspension footbridges. A manual calculation of the cable was processed. The actual position of the cable was determined by calculation. The manual calculation was compared with the RFEM calculation program. Furthermore, the models were loaded with manually calculated loads. The bachelor's thesis deals with the influence of pylon deflection on the global deformations of cable and bridge deck during individual load cases and combinations. For one of the models, the optimization of construction was processed.
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Static analysis of the sports hall roof
Meissnerová, Sabina ; Hokeš, Filip (referee) ; Vlk, Zbyněk (advisor)
The final thesis deals with structural analysis of the roofing of the sports hall. Computational model was created in the computational software Dlubal RFEM 6.04 according to the provided documents. The loads were performed in accordance with valid standards and the structure was assessed for the ultimate and serviceability limit state. Manual assessment calculations were compared with the software. The final thesis deals with the manual calculation of internal forces on a curved beam from the self-weight of the structure and the stability of the structure is demonstrated first on a single-sided fixed beam and then on the created spatial model.
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Static analysis of steel footbridge
Mareková, Adela ; Martinásek, Josef (referee) ; Vlk, Zbyněk (advisor)
The subject of the bachelor thesis is static analysis of a steel footbridge. Two different models of this structure are created in RFEM 5.16 software. The first model consists only of the upper part of the structure, the second model includes also the bottom part – columns. The load is calculated manually and applied on both models in the same way. RFEM software was also used for performing the calculation. The results from models are compared between each other and ultimate limit state assessment is carried out.
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Static analysis of steel structure
Čejková, Eva ; Martinásek, Josef (referee) ; Vlk, Zbyněk (advisor)
The diploma thesis is focused on the comparison of the linear and nonlinear analysis of the steel structure and the resulting differences in both the numerical results and the time needed to obtain these results These analyzes are performed on a high-rise building, which has 10 floors and is used as an administrative building. Static model construction and calculations are performed in software system from Dlubal RFEM only loads for individual load cases are calculated manually.
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Influence of stiffness connections on loading of steel structures
Šik, Jan ; Vlk, Zbyněk (referee) ; Nevařil, Aleš (advisor)
This bachelor thesis focuses on the analysis of the real behavior of the joints in steel structures. The introduction describes different approaches to the modeling of joints. The first approach is based on algorithms found in normative documents ČSN EN. The other approach deals with numerical modeling of the joints using the finite element method (FEM) in SW ANSYS. In conclusion, the comparison of results of different approaches to the modeling of joints.
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Static analysis of wooden structure
Včelný, Michal ; Martinásek, Josef (referee) ; Vlk, Zbyněk (advisor)
The thesis is focused on a static analysis of the timber frame structure. The designed structure has an atypical shape, where each frame has a different shape from previous one. The calculation and assessment is processed by SCIA Engineer program and subsequently verified by a simple hand calculation. The model is constructed according to the real shape of the structure and assessed for the ultimate limit state and serviceability limit state.
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Static and modal analysis of construction
Krzywoň, Filip ; Nevařil, Aleš (referee) ; Vlk, Zbyněk (advisor)
The bachelor thesis compares the behavior of different models of concrete tower structures influenced by earthquake load. There were several models made in Scia Engineer software and also one model for each tower for manual analysis. The results of modal analysis were further used along with Eurocode 8: Design of structures for earthquake resistance. The deformed models were compared with each other.
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Stability problems study of framed structures
Piják, Jiří ; Vlk, Zbyněk (referee) ; Zídek, Rostislav (advisor)
In the first chapter the problem of ideal member, member with initial curvature and meaning of Euler’s critical force is regarded. Parameters of stability, mainly calculation of critical loading and buckling lengths, are studied in the second part. The same part contains comparison of results of computational programs and mechanical approach. Next attention is paid to imperfections, to possibilities of determination and comparison of results on a simple member. Comparison of possible judgements of buckling on a simple beam and on frames according to ČSN EN 1993-1-1 is performed on the final part.
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Static analysis of the roof structure
Meissnerová, Sabina ; Hokeš, Filip (referee) ; Vlk, Zbyněk (advisor)
This bachelor thesis deals with analysis of roof of a nursery school and comparing few calculation models. Model was created according to provided foundations in program Dlubal RFEM 6.01. The load of the contruction was created due to valid norms. Created models were evaluate to limit state of load capacity, where the results were compared with manual calculation and on limit state of usability.
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