This diploma thesis deals with the design of a new bridge construction over a multi-lane communication. The converted road is a pedestrian and biking trail connecting significant agglomerations. Three studies were worked out in this thesis and the C variant was selected for further detailed processing. It is an unsymmetrical suspended bridge with a cast-in-place deck. In the section above the communication, the bridge is made up of prefabricated segments. Suspension of the structure is made of two sloping pylons forming a V-shape. The analysis of the construction was carried out in the MIDAS Civil program, where a complete model of construction was entered, including a subsequent estacade. The model describes the construction process and includes creep and shrinkage of the concrete. The traffic, temperature and wind loads were used. The design was assessed for the ultimate limit states and serviceability limit states. The assessment was carried out in the IDEA StatiCa program, supplemented by manual calculations. The static calculations also include assessment of the harmonic response. Subsequently, overview drawings, detailed drawings and visualizations were developed.

This master’s thesis deals with a comprehensive evaluation of the company's investment related to the purchase of construction machinery. All calculations are performed according to the theoretical basis introduced in the beginning. To evaluate the effectiveness of the investment, static and dynamic methods are used, together with the sensitivity analysis of individual risk factors. The probability of possible scenarios is determined using a Monte Carlo simulation. To conclude, recommendations whether the project should be implemented is given.

Diploma thesis deals with static and dynamic analysis of a wooden arch footbridge. The computational model of the structure was created in ANSYS 15. Dynamic forces from wind and horses were applied to the model based on the modal analysis. The effects of these forces at resonance were evaluated by harmonic analysis.

The subject of this master thesis is to design a pedestrian bridge supported by cables. There are three variants of studies created for this case and for most suitable one, all documentations were produced. The primary focus of this work is on static design solution with an output of several drawings. Static model for results from load cases included construction stages and was created in Midas Civil. Design and checks were performed by hand calculations, complemented by checks of several sections by IDEA StatiCa software. Analysis and calculations are compliant to up-to-date codes and respect the fundamentals of analysis due to limit states.

För att hantera den förändrade situationen i närområdet måste Försvarsmakten öka sin operativa förmåga och med det, även sin rekrytering. För specialförbanden har utebliven värnplikt inneburit en reducerad rekryteringsbas samtidigt som Försvarsmakten, för att öka sin operativa förmåga, bl.a. skapat förband med specifika kompetenser, förmågor och uppgifter vilket i sin tur lett till en konkurrenssituation avseende bemanning. För specialförbanden har detta tillsammans med ett lågt utfall från uttagningstesterna inneburit en utmaning att tillgodose det operativa behovet av systemets viktigaste resurs, personalen. Denna kvalitativa studie som baseras på semistrukturerade intervjuer och en workshop syftar till att, utifrån operativ personal vid specialförbanden, fördjupa förståelsen för hur utfallet av uttagningstesterna skall kunna förbättras. Studiens identifierade drivkrafter, som ligger till grund för individer att söka till samt fullfölja de fysiskt och psykiskt krävande uttagningstesterna, analyseras därför gentemot motivationsteorier, organisatoriska perspektiv och psykologiska begrepp. Studien tyder på att även om drivkrafterna för att söka till respektive fullfölja testerna skiljer sig åt, så bidrar dessa tillsammans med stödjande funktioner till individens förmåga att härda ut, vilken är avgörande för att fullfölja uttagningstesterna.  Utifrån resultatet kan specialförbandens attraktion utformas och riktas på ett tydligare sätt. Vidare kan befintliga urvalskriterier vidareutvecklas för att ur det totala antalet sökande, kunna kalla de individer med bäst förutsättningar att lyckas fullfölja och klara uttagningsprocessen. / The Swedish Armed Forces needs to increase the recruitment rate and operational capability in order to handle the developing situation in the region. For the Special Forces, the lack of conscripts has meant a reduced recruitment at the same time as the rest of the Armed Forces, in order to increase operational capability, has created units with specific skills, abilities and tasks, which in turn have led to a competitive situation regarding the staff. This together with a high attrition rate from selection process has led to a challenge meeting the operational demand regarding the Special Forces most valuable asset, the personnel. This qualitative research, based on semi-structured interviews and a workshop with operational personnel at the Special Forces aims to increase the understanding of how the outcome of the selection process can be improved. The driving factors identified in this research, which form the basis for individuals to apply to the Special Forces and complete the physically and psychologically demanding selection tests, are hence analysed in relation to motivational theories, organizational perspectives and psychological terms. The study indicates that the drive for applying to and completing the selection differ, however, both of them combined with supportive functions contribute to the individual's ability to persevere and are crucial elements for completing the selection process.  Based on the results attraction of the Special Forces can be designed and directed more accurately. Furthermore, existing selection criteria can be refined in order to, out of the total number of applicants, be able to select the individuals with the best chance to successfully complete the selection process.

Ce travail de thèse s’inscrit dans la cadre d’un projet ANR inter-Carnot « ReMaPoDe (Reliability Management of Power Devices) ». L’objectif général du projet est de réaliser un dispositif permettant d’évaluer en temps réel l’état de vieillissement d’un assemblage de puissance embarqué par le suivi de son état thermique et mécanique pendant son fonctionnement. L’essentiel du travail présenté dans ce mémoire consiste à mettre en évidence la relation entre le vieillissement mécanique d’un assemblage de puissance et les dérives électriques qui peuvent être observées. En outre, compte tenu des problèmes thermiques liés aux applications embarquées, la caractéristique électrique choisie comme indicateur doit être rendue indépendante des effets de la température. Ainsi, après un état de l’art consacré à la présentation des différents types de vieillissement et aux défaillances rencontrées dans les assemblages de puissance, nous distinguerons différentes caractéristiques électriques qui semblent prometteuses pour effectuer le suivi en temps réel de l’état de vieillissement mécanique d’un assemblage de puissance et ce malgré des variations de température ambiante et le vieillissement de certains matériaux constituant l’assemblage / This work is part of an inter-Carnot ANR project "ReMaPoDe (Reliability Management of Power Devices)." The overall project objective is to provide a device to evaluate the real-time status of ageing of a power assembly by monitoring its thermal and mechanical states during operation. Most of the work presented in this thesis consists in highlighting the relationship between the assembly mechanical ageing and the observed electrical evolution. Moreover, due to the thermal problems related to embedded applications, the electrical characteristic chosen as an indicator must allowed to overcome the effects of temperature. Consequently, following a state of the art dedicated to the presentation of different types of ageing and failures encountered in power assemblies, we will distinguish different electrical characteristics that seem promising to monitor in real time the mechanical ageing state of a power device assembly in spite of ambient temperature variations and the ageing of some materials constituting the assembly

This master thesis deals with an impact of particular static and dynamic forces and temperature strain on horizontal synchronous generator. In connection with this, a stress distribution in construction and an assessment of security to terminal state of flexibility and weariness is being solved together with finding the most critical places on horizontal synchronous generator.

This doctoral thesis focuses on the research of the pedestrian bridges formed by the flat arch. To understand the basic static behaviour of the flat arch it was necessary to make a study of the development of the direct flat arch as footbridge with large span and the impact of stiffness on its camber. For the mathematical modeling FEM software ANSYS were used. The calculation has shown that a design of purely concrete flat arch would demand enormous bending stiffness, which can be achieved only through a massive cross-section. The findings gained in this chapter were further used to design a unique pedestrian bridge formed by the curved in plan flat arch, where to transfer of the large bending moments a steel pipe was designed. Several variants with different span and rise of the arch in plan were tested. From the tested variants was then selected footbridge with a span of 45 m and with the rise of the arch 10 m, which seemed to be the best solution according to the calculations and it was further analyzed in detail. The studied structure is formed by curved concrete slab that is stiffened through the steel brackets on the inner side of a steel tube with a graded thickness. The external cables that are situated in the handrail pipe balance the dead load torsional moment. Designed structure and the static analysis procedure were verified on a fully functional 1:6 scale model. The thesis describes the model analogy used for the design of the model, its structural design and its implementation. Load tests on the model confirmed correctness of the design of the proposed curved in plan pedestrian bridge, its high carrying capacity and the accuracy of the developed procedure of static analysis. Results and experiences acquired from the design and the realization of model are the basis for a practical realization of studied structures. The last part of the thesis deals with the possibility of replacement of the steel components with concrete in pedestrian bridges formed

The aim of the doctoral thesis focuses on the static and dynamic analysis of a plan curved cable stayed and suspension pedestrian bridges suspended on a single-side of their deck. The first part of this thesis deals with an analysis of the equilibrium in the transversal direction of a deck cross section suspended on a single-side. The section and its arrangement should be designed so that the torsion caused by the deck self-weight and dead load would be minimal. This theory was verified on a simple study of a single-sided suspended section with and without prestressing. Second part of the thesis deals with the design of a study of a plan curved cable stayed pedestrian bridge. The study describes in detail a finding of an initial state of the structure and the static and dynamic analysis performed by software ANSYS. The static analysis describes the response of the structure on the most frequent variable loads only, but not design of dimensioning according to the valid codes. The dynamic analysis verifies a predisposition of the structure to the vibrations and others harmful oscillation effects. The next objective of the thesis was to design a study of a plan curved suspension pedestrian bridge suspended on a single-side. A process of an analysis of these structures has not found in any available references. Especially, the finding of an initial state of a suspension cable has not been documented anywhere and by anybody. The study was analyzed with the same geometry as the cable stayed variation in order to compare both structures. The static and dynamic analysis was performed, too. The last part of the thesis describes the verification of structural solution on a fully functional model in a 1:10 scale, proposed process of the initial state finding, response of the structures on the loading and ultimate load test. The important step is the comparison of the results of the completed physical model and the calculation model.

The theme of this doctoral thesis is research of footbridges curved in plan that are formed by stress ribbon. Recently, several noteworthy curved pedestrian bridges, which decks are suspended on their inner edges on suspension or stay cables, have been constructed. However, curved stress ribbon bridges have not been built so far. The goal of this study was to answer the question whether the use of curved stress ribbon structures is even possible. For this reason, in the first stage feasibility study of these structures has been prepared. Knowledge of both curved pedestrian bridges, which decks are suspended on their inner edge and straight stress ribbon has been used. For the mathematical modeling FEM software ANSYS was used. The obtained findings were further used to design a new type of a modern, aesthetic curved bridge for pedestrians. The structure is formed by slender reinforced deck, which is through the steel brackets on the inner side stiffened by steel section. Torsion of the deck, caused by curved structure and asymmetrical cross-section, is reduced by cable situated in the handrail. Footbridge span is 45 m, arc camber in plan is 10 m, free bridge width is 3 m. Described is a general structure effect, detail static and dynamic analysis was carried out. Designed structure including construction stages were experimentally verified on a fully physical functional 1:6 scale model. The thesis describes the model analogy used for the design of the model, its structural design and its implementation. The model was subjected to a series of load tests including the final ultimate strength test. Performed tests confirmed the good match of calculation with the reality, correctness of the design and high resistance of designed construction. Acquired results and experiences from design and realization of model form the basis for practical realization of studied structures.