|
| |
|
|
Design of structures with FRP reinforcement
Matušíková, Anna ; Vácha, Jaroslav (referee) ; Štěpánek, Petr (advisor)
This diploma thesis presents available FRP software for calculating load bearing capacity of the structures reinforced with FRP and compares them between each other. Furthermore theory and algorithm of my own software is presented here. Load bearing capacity of structures which are reinforced with non-metallic reinforcement and loaded by combination of normal force and bending moment can be solved by my programme. Effects of high temperatures on the concrete structures can be included in the calculation. In the second part of the thesis is calculated load-bearing capacity and deflection of the real beam reinforced with FRP reinforcement and load-bearing capacity of member with FRP reinforcement with effect of elevated temperature. This has been done using my software. Comparison of results from hand calculation and laboratory load-bearing testing is done at the end. This laboratory testing was accomplished by Institute of Concrete and Mansory Structures at our faculty.
|
|
| |
|
| |
|
|
Stress and deformation analysis of railway bridge over the Odra River
Svoboda, Josef ; Profant, Tomáš (referee) ; Fuis, Vladimír (advisor)
This bachelor thesis deals with strain, stress and deformation analysis of the planar truss bridge construction. The aim is to determined the size of axial forces for statically determinate system and then making construction changes to reduce axial stresses in the individual beams in the structure. This structural modification becomes statically indeterminate structure. To solve this problem we consider different positions of the train at the bridge. The obtained values we can use to assess stress and deformation of the structure and the analytical results will be compared with the results obtained using the finite element method.
|
|
|
Stress and deformation analysis of railway bridge over the Morava River
Trávníček, Lukáš ; Profant, Tomáš (referee) ; Fuis, Vladimír (advisor)
This Bachelor Thesis contains stress and strain analysis of the first two parts of the railway bridge in Olomouc with an assessment of changes in the stress and strain when changing the static storage. Firstly, the theoretical basis of rod systems is presented, it is followed by the calculation of normal forces and the stress in rods for both parts separately. The calculations include the load arising from its own weight and from the weight of a train, which is represented by the load at the framework joints. Next, these two parts are connected. For this rod system a stress-strain analysis is also used. In conclusion, stress and strain is calculated for comparison by the finite element method in the program ANSYS Classic.
|
|
|
Deformation, stress and safety analysis of the recumbend frame.
Verner, Jan ; Majer, Zdeněk (referee) ; Vrbka, Jan (advisor)
This work contains deformation, stress and safety analysis of recumbent bike frame from company AZUB. After introduction about history, definition of beam and beam assumptions, computational model of the frame was made fallowed the main solution. Three load states was checked - stillnes / uniform ride, deceleration and pedalling. The third one was subjected to deeper analysis. Bending problem in defined location was solved for all states. Inner stress resultans was solved as Von Misses stress, and the safet y was calculated. The fist state was compared with FEM. A program in MATLAB was made, enabeling calculation of user- selected frame geometry and loading.
|
|
| |
|
|
Polymer nanocomposites with PMMA matrix
Kostková, Jana ; Žídek, Jan (referee) ; Jančář, Josef (advisor)
This bachelor thesis deals with s study of mechanical and viscoelastic properties of nanocomposites with PMMA matrix filled with different types of surface-modified silica, which differed by the specific surface area, surface treatment and particle size. Nanocomposites were prepared by dissolving, where nanofillers were injected into the dissolved matrix. Nanocomposite samples were tested in tensil and viscoelastic properties were determined till the softening point by dynamic-mechanical analysis (DMA). All types of nanofillers had almost no effect on tensile modulus of nanocomposites at room temperature (it was not reduced) one type of silica at a content 2 %, which was also confirmed by the DMA. The temperature DMA measurements showed that samples containing 2 % of silica were generally thermally more stable compared with nanocomposites containing 1 % of silica. Storage modulus of nanocomposites, except two ones, were similar or lower such pure PMMA to temperature 66 C, then the trend reversed. Loss modulus of all samples was one order of magnitude lower then the elastic modulus.
|
|
| |
guest ::
