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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
121

Městská knihovna / City Library

Žajdlík, Pavel January 2014 (has links)
This thesis addresses the new building of the municipal library on 3 floors. Operation of library is divided into public and private part. On the first floor there are dressing rooms, technical facilities, training rooms and spaces for commercial uses, such as a cafe and stationery. Storage spaces of library are using all floors and they are located in a separate wing. The main interest of readers is placed into the second and third floor, there are also offices to ensure the operation of the library. All floors are equipped with sanitary facilities for each building operation. The building is covered with flat roof.
122

Temperiertes Innenhochdruck-Umformen von Rohren aus Magnesium- und Aluminiumlegierungen

Seifert, Michael 06 June 2008 (has links)
Die Anwendungsmöglichkeiten und Potenziale des temperierten Innenhochdruck-Umformens mit flüssigen Wirkmedien (T-IHU) von Rohren aus verschiedenen Magnesium- und Aluminiumknetlegierungen werden in der vorliegenden Arbeit aufgezeigt. Neben der Werkstoff- und Halbzeugcharakterisierung, der Auslegung von temperierten Innenhochdruck-Umformanlagen und –werkzeugen, den Thermografiemessungen am Halbzeug unter Realbedingungen und der Verifizierung der Simulationsergebnisse des T-IHU-Werkzeuges war der inhaltliche Schwerpunkt die systematische experimentelle Bestimmung der maximalen Umfangserweiterung ∆u<sub>max</sub> in Anhängigkeit von der Umformtemperatur ϑ<sub>u</sub>, dem Werkstoff und der Wanddicke s<sub>0</sub> im Temperaturbereich von 22°C bis 300°C an drei Versuchsgeometrien T-Stück, Zylinder und Quader bei Innendrücken bis 800 bar. Neben dem Einfluss der Prozessparameter, der Werkstoff- und Halbzeugeigenschaften und der Ausgangswanddicke wurde der signifikante Einfluss der Umformtemperatur und der Umformgeometrie auf die erreichbaren Umfangserweiterungen herausgearbeitet und systematisch dargestellt. Es wurden Umfangsdehnungen von bis zu 120 % (bei ϑ<sub>u</sub> = 300°C) erzielt. Die experimentelle Bestimmung der minimal auszuformenden Bauteilaußenradien erfolgte unter Anwendung der statistischen Versuchsplanung. Aus den Regressionsgleichungen wurde eine neue Berechnungsgleichung für den maximalen Innendruck p<sub>imax</sub> generiert. Durch die Verifikation dieser Gleichung konnte die hohe Genauigkeit bei der Vorausberechnung des erforderlichen Innendruckes bei einem vorgegebenen minimalen Bauteilaußenradius R<sub>min</sub> in Abhängigkeit von der Zugfestigkeit R<sub>m</sub> als f (Umformtemperatur) und der Wanddicke s<sub>0</sub> nachgewiesen werden. Die Auslegung der T-IHU-Werkzeug- und Anlagentechnik kann damit wesentlich genauer er­folgen. Durch die Bauteilanalysen nach dem T-IHU-Prozess konnten die hohe Maß- und Formgenauigkeit und die hohe und gleichmäßigere Oberflächengüte nachgewiesen werden. Trotz der beginnenden dynamischen Rekristallisation lag bei allen Versuchswerkstoffen eine Erhöhung der Werkstofffestigkeit in der Umformzone vor. Bei den Untersuchungen bzgl. des T-IHU des Realbauteiles „PKW-Querträger vorn“ konnten die Kenntnisse der Grundlagenuntersuchungen auf ein komplex geformtes Realteil übertragen und erweitert werden. Es zeigte sich, dass der Einsatz von T-IHU-Magnesiumbauteilen ein erhebliches Potenzial für weitere Gewichtsreduzierungen von Leichtbaukonstruktionen besitzt. / This paper presents the potential applications of temperature-supported hydroforming of various magnesium and aluminium alloy tubes using active liquid media. It includes details of material and semi-finished product characterisation, the design of temperature-supported hydroforming equipment and tools, thermography measurements on the semi-finished product under real conditions and verification of simulation results for the temperature-supported hydroforming tool. The main focus, however, was the systematic, experimental approach to determining the maximum increase in perimeter ∆u<sub>max</sub> as a function of the forming temperature ϑ<sub>u</sub>, the material and the wall thickness s<sub>0</sub> in the temperature range 22°C to 300°C for three trial geometries (T‑piece, cylinder and cuboid) at internal pressures of up to 800 bar. In addition to studying the effect of process parameters, material properties, semi-finished product characteristics and initial wall thickness, the paper also presents the finding that forming temperature and forming geometry have a significant impact on achievable increases in perimeter. Perimeter expansions of up to 120 % were attained (at ϑ<sub>u</sub> = 300°C). Statistically designed experiments were used to determine the minimum component outside-radii to undergo the forming process. A new equation for calculating the maximum internal pressure p<sub>imax</sub> was generated from regression equations. By verifying this equation, it was possible to demonstrate the high level of accuracy in predicting the internal pressure required for a given minimum component outside-radius R<sub>min</sub> as a function of the tensile strength R<sub>m</sub> as f(forming temperature) and of the wall thickness s<sub>0</sub>. This means that the temperature-supported hydroforming tool and system equipment can be designed far more accurately. Component analyses after the temperature-supported hydroforming process demonstrated the high level of dimensional and geometrical accuracy and the high quality and more consistent surface finish. Despite the onset of dynamic re-crystallisation, the strength of the material was increased in the forming zone in all the materials tested. The knowledge gained from researching the fundamental principles was applied to a real component with a complex shape in studies of temperature-supported hydroforming of the "front car cross-member", which provided further useful insights. It was found that the use of temperature-supported hydroforming magnesium components has considerable potential for further weight reduction in lightweight constructions.
123

Sídlo firmy Alemat s.r.o. se skladem / Alemat s.r.o. headquarters and warehouse

Petr, Lukáš Unknown Date (has links)
This diploma thesis deals with design of office building with warehouse. The buildings are situated on slightly sloping terrain in cadastre unit of Sudoměřice u Tábora. Both buildings have rectangular shape and are connected with two sides. The Alemat s.r.o. company is internet shop, predominately with electronics. In the office building is also showroom where are some products will be shown. The warehouse will serve for receipt and issue of goods and to store them. The perimeter walls of office building is designed from ceramic block thickness of 250mm, for example Heluz Family 25. The walls will be insulated with 200mm of expanded polystyrene. The foundation construction is designed as foundation strips from plain concrete and permanent formwork brick filled with concrete and reinforced with steel. The ceiling construction is designed as prestressed panels thickness of 250mm. The roof is flat with main hydro isolation made of plasticized PVC foil loaded with pea gravel. The main construction of warehouse will be made of steel frames. The exterior skin of the warehouse will form panels Kingspan thickness of 140mm. The foundation construction is designed as monolithic foundation pads. Between the pads will be monolith grade beams. The roof is designed also from Kingspan panels. To the panel will be mechanically fastened plasticized PVC foil. Roof drainage is designed to rain gutters.
124

Futurama business park - objekt C, stavebně technologická příprava / Futurama Business Park - object C, technological preparation of construction

Okrouhlý, Petr January 2012 (has links)
The subject of the thesis is the solution of technological preparation of new building construction Futurama Business Park - the object C. In this thesis, is solved by the implementation of earthwork, foundation structures and reinforced concrete monolithic skeleton. Establishment of the building will be made on the concrete foundation slab. The building is designed as a reinforced concrete frame with perimeter steel columns and glass façade. The work also includes a timetable and financial plan (budget) building, technological regulations, technical report of building equipment, mechanical design assembly, inspection and test plan, design of site facilities, safety plan, impact of technological stage on the environment.
125

Vytápění bytových domů / Heating of apartment buildings

Diatel, Jakub January 2019 (has links)
The topic of this diploma thesis is heating of apartment buildings, where an attention was focused on thermal comfort in heated rooms. The first theoretical part brings results of CFD simulations which compare radiators with floor heating. The second part consits of practical application o the given building. There are two options in this project - heating by radiators or floor heating. The third part describes two experiments - measurement of indoor environment in two rooms and measurement of gas consumption in apartment buildings with different heating concepts. In the last part the mean radiant temperature is simulated. There are compared different kind of heating, which have impact to distribution of mean radiant temperature in the room. The personal software was created for deeper understanding of mean radiant temperature.
126

Městské lázně / The Municipal Baths

Tunková, Martina January 2010 (has links)
"The sick body needs a doctor friend sick souls." (Menandros)

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