The master thesis focuses on the design of a Load-carrying steel structure of railway bridge with bottom steel deck of the span of 28 + 45 + 23 m. The bridge is situated in the municipality of Třebestovice. Four variants of solution have been calculated. Two variants are made by plate main beams of variable profile, the next alternative was made by truss structure and the fourth variant consist of a combination of plate main beams with truss stiffener in the middle span. The most optimal solution was processed in detail. The calculations were done in compliance with valid ČSN EN norms.

The topic of my master's thesis is a concept and evaluation of a new steel construction of a foot bridge for pedestrians and cycles across the river Morava. The concept has two alternatives. Option 1: The foot bridge has three spans. The span lengths are 27+81+27m, the middle span is stiffened by an arc. There is a bridge deck that consists of a cellular beam which is locked onto the arc. The bridge deck is lower, steel and orthotropic. The arrangement of rods is radial. Option 2: The middle span is stiffened by two arcs bowed to each other. The bridge deck consists of two beams with crossbeams and is locked onto the arcs. The bridge deck is again lower, steel and orthotropic. The arrangement of rods is radial. The wind bracing has a shape of a Vierendeel beam.

This thesis deals with the design and assessment of footbridge for pedestrians and cyclists in the city of Hranice, Rybare district. The footbridge will serve as a crossing point over the river Bečva and will conect cycling trail with the street Rybarska. The content of this paper is to propose two different variants of structures. One of these options is selected based on their economic evaluation and further processed. Length of the bridge is 50m.

The diploma thesis is focused on a design and appraisal of a steel load bearing construction of footbridge. The footbridge builds a new bridge across the river Ostravice in Sviadnov at Frýdek-Místek. The main subject of the diploma thesis was preparation of three variants for the footbridge. All variants were evaluated and the best one was elaborated in depth. It is a footbridge with a total span of 57 metres with a load bearing construction created two arches bent down to each orther. There is an orthotropic bridge deck with main outer lenghthways girders on the arches.

The thesis deals with the variant design of the steel structure of single-track railway bridge on the line Tišnov – Nové Město na Moravě. The task is bridging the local road by a bridge structure with one field. Length of the bridge is 40 m.

This Master Thesis compares three various concrete materials for stiffening orthotropic bridge deck plate and investigates stress reducing factors in selected weld joints. The thesis investigates the standard load situation and also overloaded situation. A parameter study with different material inputs has been done to see how it affects stress in weld joints.

Powertrain mounts' purpose is to mount the engine and the gearbox in the car. Besides that, it isolate the body from the powertrain movements and road excitation. The most common material in powertrain mounts bracket is aluminum but lately, fibre reinforced polymer (FRP) has been acting as a substitute for the aluminum. The major drive forces for the change is the possibility to decrease the weight and improve the attribute noise, vibrations and harshness (NVH). The main objective of this study was to compare aluminum and FRP in order to find advantages and disadvantages for use in a powertrain mount bracket. FRP's have in earlier investigations at Volvo Cars been assumed to be isotropic, although it is orthotropic due to fiber orientation. Hence, a comparison between isotropic and orthotropic material properties for the powertrain mount bracket was conducted. There was no established method for modelling orthotropic materials available at the powertrain mount department, so a suggestion of a work process was presented in this thesis. Information regarding FRP, as well as a comparison to aluminum was presented in a literature study. The different materials and material models were compared in series of stress-strain and eigenmode FEM analyses. The results from the stress-strain analyses evinced that the design for the aluminum bracket can withstand the loads without exceeding the design limit. In the FRP bracket with orthotropic material properties, the design limit was exceeded for the load cases with the highest load. The results from the stress-strain and eigenmode analyses of the isotropic and orthotropic material models showed significant differences. According to the isotropic material model, the bracket could withstand the loads, and the eigenfrequencies was 25-30% higher compared to the orthotropic material model. The conclusions drawn from this study was that FRP's may be an advantageous material for the powertrain mount bracket, compared to aluminum. The FRP's bracket will decrease the cost, weight, and carbon footprint as well as improve the NVH. However, difficulties of using FRP's have been observed and need to be further investigated. The main difficulties identified are creep, fatigue, moisture absorption, and aging. This study has also proved that orthotropic material properties must be included in order to understand the material behavior and find critical areas.

Wood is a complex organic orthotropic viscoelastic material with acellular structure. When stressed, wood will deform over timethrough a process called creep. Creep affects all wooden structureand can be difficult, time-consuming and expensive to measure. For this thesis, a simple computer model of the woodenmicrostructure was developed. The hypothesis was that the modelledmicrostructure would display similar elastic and viscoelasticproperties as the macroscopic material. The model was designed by finding research with cell geometries ofconiferous trees measured. The model considered late- and earlywoodgeometries as well as growth rings. Rays were ignored as they onlycomposed 5-10% of the material. By applying a finite element method, the heterogeneous late- andearlywood cells could be homogenized by sequentially loading thestrain vector and calculating the average stress. The computer model produced stiff but acceptable values for theelastic properties. Using the standard linear solid method to modelviscoelasticity, the computer model assembled creep curvescomparable to experimental results. With the model sufficiently validated, parametric studies on thecell geometry showed that the elastic and viscoelastic propertieschanged greatly with cell shape. An unconventional RVE was alsotested and shown to give identical result to the standard RVE. Although not perfect, the model can to a certain degree predict theelastic and viscoelastic characteristics for wood given itscellular geometry. Inaccuracies were thought to be caused byassumptions and approximations when building the model.

This thesis deals with design of III/0462 road overpass over D46 highway near Brodek u Prostějova. There are 2 preliminary variants. First variant is a right bridge, whose main beams are tied archs. Second variant is a skew bridge with truss superstructure. In case of second variant there are three subvariants differing with truss design. Design and calculation is done according to valid standarts and other regulations for designing bridges.

The subject of this diploma’s thesis is design of the footbridge over Radlická street in Prague. Total length of the footbridge is about 90 m. Three variant designs were made with different systems of static construction. Based on the multi-criteria analysis, the most suitable variant was chosen. The variant A, a continuous truss beam, was chosen for detailed design. It is a truss footbridge with a lower orthotropic deck without a wind bracing. The stability of the upper chord is secured by frame stiffness of verticals and stiffness of the floor beam. Detailed static calculation includes assessment of load-bearing parts of the structure and assessment of welds. The structure is made of steel class S335. Assessment and dimensioning were designed according to valid standards ČSN EN 1990-1993.