The subject of Diploma’s thesis is the design of a road bridge on the R1 expressway, at km 1,293 above the road III/51311. The main content is static calculation of supporting structure consisting of four spans. Four studies were processed and the first variant of double-girder monolithic structure was chosen. The range of spans is ranging from 25 m - 30 m. Double-girder consists of two post-tensioned concrete beams and reinforced concrete slab. Static models and load effects are solved in Scia Engineer. Bridge is located in the horizontal curvature, however, compromise was elected (because of small curvature), assessing the upright design. Calculation is made without effects of temperature, wind loads and horizontal forces causing by traffic.

The subject of this Diploma Thesis is to develop different alternatives of the road and tram bridge. It is a river bridge with the length of 52,5 m. There are compared two proposals, while in the first proposal it is an arch bridge with the tension bars. The second proposal which is also finalized as the winning proposal is the truss structure. Both proposals have composite deck. The structure is designed from steel S355 and concrete C35/45. The load bearing structure is designed in accordance with applicable technical standards.

The final thesis is focused on design of the superstructure of a new concrete bridge in city Žďár nad Sázavou, Kraj Vysočina. The bridge should serve for passing roadway, cycle path and pavement across the river Sázava. The base for bridge design include the measured terrain. The static system is self-anchored system of arch, braces and prestressed semi-through deck. The bridge span is 74,02. Arch span is 57,00 m with high 12,00 m. Construction was assessed by the ultimate limit state and service limit state according to recent standards (Eurocode).

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 Master's thesis is the design of a road bridge on the D1 in the section Lietavská Lúčka - Višňové in the Žilina Region, Žilina District, Slovak Republic. The bridge is used to cross the valley in KM 4,313 and the road in KM 4,410. Three variants of bridging were proposed, but further in the work an assessment is made on one of the variants. The total length of the superstructure is 354.00 m, the theoretical total span of the structure is 352.00 m. The bridge has 4 spans and is constructed by free cantilever method .The locations of the supports were limited by unsuitable geological conditions at the construction site (active shear area in Quaternary sediments), especially in span No. 3 (span lenght 104.00 m) and span No. 4 (span lenght 75.00 m). The monolithic part of the bridge structure will be concreted by free cantilever method with the largest length of the cantilever 52.00 m. The outermost parts of fields No. 1 and No. 4 will be cast-in-place using fixed scaffolding.

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.

The master´s thesis deals with a new road bridge on the road II/379. There are three possible variants in preliminary design but only the option of connected girder slab beam of four fields was selected. This variant was assessed by static calculation in accordance with European standards. Other important parts of this thesis are also drawings, construction progress, visualisation and technical report.

The aim of this work is design and assessment of the box-girder road bridge on by-road of Bludov. Bridge is designed as composite steel concrete bridge with 5 spans with distances between supports of 31,25 m; 40,0 m; 60,0 m; 60,0 m and 40,35 m. Main bearing structure is designed as open steel box-girder with reinforced concrete deck. Box girder is braced with longitudinal and transversal bracings. Main structure is separated for each traffic direction. The bridge crosses river Morava and railway in 2nd and 3rd span, respectively. The category of road I/44 is S 21,5/100. The height of steel box girder is designed as 2,5 m. Bridge will be built by incremental launching method, with in-situ casted concrete deck afterwards. The bridge is designed according to current standards. Supporting elements are designed from steel of class S 355 and concrete of class C35/45.

The aim of the master thesis was a design of the steel-concrete composite road bridge for a main road in Ostrava. The part of the design was a variant design of the bridge which has theoretical spans equal to 44 m + 55 m + 44 m. Total span of the bridge is then 143 m. Two variants of the bearing steel structure are compared in the preliminary structural design, in the first one a twin-girder is designed and in the second one a box-girder bridge is assessed. The width of the bridge is 14 m and a launching of the bridge without temporary supports is chosen as the assembly method. The design of the bridge structure was carried out according to the valid standard ČSN EN. The final thesis contains variant design, structural design report, where a bill of quantities is stated, engineering report and drawings.

The subject of this diploma thesis is the design of post-tensioned road bridge over the valley. Two preliminary studies have been proposed and one of them was selected for more detailed processing. The selected variant is a box girder with a constant height 2,5 m. The construction id divided into five span and its total lenght is 240 m Span length of construction is 18,0 m. The construction was assessed for ultimate and serviceability limit state acording to standarts and regulation. Drawings and vizualizations ard parts of the diploma thesis.