The subject of the thesis is to design and consider steel superstructure of a composite steel-concrete road bridge. It is a continuous beam with seven spans of 36,0 + 57,0 + 75,0 + 90,0 + 75,0 + 57,0 + 36,0 = 426 meters. The superstructure consists of welded I-beams, which pass into closed box girder. The calculations take into account the construction phase.

The diploma thesis deals with design and assessment of steel arched bridge with the semi through bridge deck placed on the third-class road. This steel structure is drawn up to bridge water barrier – the river Olše in Návsí. The distance between axes lay on abutments is 48,5 meters. The bridge´s supporting structure consists of two steel arches angled towards each other and fastened to the foundation blocks. The supporting beam of the bridge deck is tied to the arch by tie-rods. The tie-rods are designed to the V-shaped system.

Aim of this thesis is to design a concrete road bridge over a Neborůvka stream and surrounding valley. This bridge is a part of I/11 road. Three preliminary designs with focus on girder bridge solution were made. As a most suitable variant was chosen two gilder beams variant. For this variant was made a static calculation concerning TDA. This design was made according EC. As a construction method was chosen classic construction with falsework. Design was made in Midas Civil and Dlubal RFEM calculation software. As a next step a drawing documentation was made as well as construction time plan and bridge visualization.

The content of the thesis is a proposal of steel load-bearing structure (carrying structure of a steel) bridge of the span of 31+74+31m with the bottom bridge deck taking over the second-class road in the territory of Olomouc city. The bridge deck is created by composite steel-concrete slab with crossbars. The solution was focused on using arched construction in the middle of the bridge with different tilt of arches to the horizontal central axis of the bridge. Under the term of the solution four alternatives have been calculated. The most optimal solution was selected and processed in detail. The calculations were made in compliance with the Czech technical norms ČSN EN.

The task of the thesis is to design composite steel-concrete bridge consisting of four spans. Student will design two versions – continuous beam and four simple supported beams.

The proposal is for new construction of a road bridge over the highway.Three options of solutions were proposed but only the option of connected girder slab beam of six fields was selected. This variant was assessed by static calculation. Static calculation is processed in accordance with European standards. Another important part of this thesis is also drawings, visualization, technical report and construction procedure.

The diploma thesis deals with the design of a continuous prestressed bridge structure transferring the D56 motorway on the Frýdek-Místek bypass. The bridge bridges the local watercourse of the river Olešná, Příborská street and road II / 473. Three studies were proposed, from which a variant of a two-beam continuous prestressed monolithic slab was selected and elaborated. The static model and calculation of its internal forces took place in the program SCIA Engineer 20.0. The calculation is performed according to valid standards, limit states, which also includes the effects of construction. The work also contains detailed drawing documentation.

The diploma thesis focuses on the preparation of technological project of a reconstruction of a road bridge in Brno in the district of Brno-Slatina. The reconstruction consists of replacement of the whole construction of the bridge except for the pile foundation. The reconstruction will be executed in two phases with consideration of keeping road traffic on the bridge. The bridge is designed of reinforced concrete with the deck constructed of prestressed prefabricated girders.

The diploma thesis deals with the design of the supporting structure of a road bridge over a reservoir. Two variants of bridging were processed. The selected variant is a three span continuous beam. It is made of box girder cross section with a variable height. The structure has a total length of 156,8 m and is built using balanced cantilever method. The bridge is designed and assessed according to the limit states for temporary and permanent design situations. Structural analysis, drawing documentation and visualization of the bridge is part of the work.

In September 2000 the DAfStb issued a technical recommendation for the experimental assessment of structural safety and usability of concrete structures. By now, the influence of pavement or floor layers and of other factors on the load carrying capacity is not known exactly. In this thesis, it has been investigated how road pavements, the geometry and bridge caps reduce the actions on concrete bridge structures and how these influences should be taken into account in the experimental evaluation of the bending capacity by an additional test load increment. In co-operation with a local authority in Stralsund, Germany, comprehensive loading test could be performed at an abandoned concrete bridge with prefabricated girders. Between loading cycles, the pavement has been stepwise disassembled. In addition, the ultimate load of the structure as well as of an individual girder has been determined in fracture tests. By means of a hybrid analysis, i.e. a numerical simulation supported by experimental data, the influences of the pavement layers have been determined. These results were verified by experimental observations obtained in past bridge tests. The influence of the pavement layers on the load carrying capacity appeared to be as high as 28% at the maximum for the bridges investigated. Since the loading vehicle BELFA has been completed in March 2001, test loads can be applied now self-securing to bridges in the so-called large load circuit, i.e. the structure is loaded including supports and foundation. The technical concept, the principle and possible applications of the BELFA are described. The results presented will allow to determine the additional test load increment for compensating the influence of pavement layers, structural geometry and bridge caps in future experimental safety evaluations. For this analysis, the exact geometry of the structure, the thickness of the pavement layers as well as their material properties, especially the modulus of elasticity, have to be known. Guidelines for the analysis procedure as well as for simplifying assumptions are given. / Experimentelle Nachweise der Tragsicherheit und Gebrauchstauglichkeit von Betonbauwerken sind seit September 2000 in einer DAfStb-Richtlinie geregelt. Der Einfluss mittragender Aufbauschichten und anderer Faktoren war bisher quantitativ unbekannt. In der vorliegenden Arbeit wurde untersucht, wie Straßenbeläge, Bauwerksgeometrie und Kappen die Beanspruchung der Tragkonstruktion von Massivbrücken mindern und im experimentellen Nachweis der Biegetragsicherheit durch eine Überlast zu berücksichtigen sind. In Zusammenarbeit mit dem Straßenbauamt Stralsund konnten an einer Fertigteilträgerbrücke Belastungsversuche mit sukzessivem Rückbau des Fahrbahnaufbaus sowie Bruchversuche am Gesamtsystem und an ausgebauten Fertigteilträgern mit Ortbetonergänzung erfolgen. Mit Hilfe der hybriden Statik, also der Modifikation und Evaluation von Rechnungen anhand experimentell erlangter Messwerte, wurden die Einflüsse der Aufbauschichten quantifiziert und durch Auswertung weiterer Brückenbelastungsversuche verifiziert. Der Einfluss der Aufbauschichten betrug bei den untersuchten Brücken bis zu 28%. Seit der Inbetriebnahme des Belastungsfahrzeuges BELFA im März 2001 können Versuchlasten auch im großen Kräftekreislauf, d.h. am Gesamtsystem einschließlich Auflager- und Gründungssituation, selbstsichernd aufgebracht werden. Die Entwicklung des BELFA, seine Funktionsweise und seine Einsatzmöglichkeiten werden erläutert. Mit den Ergebnissen dieser Arbeit ist es zukünftig möglich, die notwendige Überlast bei Belastungsversuchen zur Kompensation der Einflüsse aus Straßenbelag, Bauwerksgeometrie und Kappen mit genauem Aufmaß der Bauwerksgeometrie und der Schichtdicken sowie mit ingenieurmäßigem Abschätzen der Materialkennwerte (E-Moduli) hinreichend genau zu bestimmen. Handlungsempfehlungen geben Hinweise zur generellen Vorgehensweise sowie für vereinfachte Rechenannahmen.