ce/papers最新文献

This article briefly describes the project background, timelines, structural data, actually achieved milestones and current stage of project of the bridge over Gottleubavalley in Pirna, Saxony, Germany. The bridge is being built using incremental launching method, the main challenges of the launching process are briefly described together with some learning points.

The winning design from the architectural competition in 2006 proposed very slender (1 to 35 !) hybrid steel-concrete semi-integral frame crossing the 70m deep and 1000m wide valley with nine spans (92 – 116 – 120 – 120 – 124 – 108 – 92 – 76 m) with maximum span length of 124m. The paper describes the challenges the team faced during the preparation and launching of a very slender bridge deck with deflections up to 6m when touching down at the bridge pier. By the time of the venue, the incremental launching will be already finished, and the lowering works will be in progress.

This contribution describes the architectural and structural solutions of a unique pedestrian footbridge in Hradec Králové. The new significant construction was built over the Elbe River in the pedestrian area. The bridge design was challenging for architects, planners even though contractors, especially due to accounting for the influence of shipping traffic. Completed structure has two asymmetrical spans, whereas the main span across the river is 69 m long. In the final static scheme, the structure forms a virtual Vierendeel truss of variable height. A slender UHPFRC bridge deck supported by a pair of cables through thin steel crossbars creates a delightful bridge, which has become a new symbol of the city.

Sky Bridge 721 was opened on 13 May 2022.

It is located in the area of the Kralicky Sneznik mountain massif in the area of the Dolni Morava Mountain Resort. It was built in two years and spans the valley between the two ridges Slamnik and Chlum with a length of 721 metres.

It has become a new landmark of the region, although in reality it is almost invisible when viewed from a distance. It winds like a thin thread below the horizon of the mountain ridge, suspended between the sky and the ground, so that it does not interfere with the view of the surrounding countryside.

It was a real challenge to bridge such a wide valley at a height of nearly 100 metres and to achieve a subtle line of the footbridge that would not disturb the silhouette of the mountain massif.

This is the story of the whole process, from the design to the statics, construction, design and implementation, that the TAROS NOVA a.s. team had to overcome during the implementation of the footbridge.

A novel prefabricated steel-concrete composite girder is proposed, which aims to provide an economic and sustainable solution for small bridge construction. The girder consists of composite dowels and concrete slabs. The depth of composite girder is analyzed in a span range of 8-20m. A continuous deck joint between the simply supported bridge is proposed to enhance the durability of the girder. Carbon emissions from construction materials are compared between different schemes. The efficiency of the schemes is evaluated through Live Load Structural Index.

‘Robinson’ Bridge was built as part of the National Athletic Centre project in Budapest, Hungary. The 168 m long cable-stayed pedestrian bridge has a 65 m tall inclined pylon standing on a small island. The 12,72 m wide main girder is suspended to a monopylon with a two-plane fan-shaped FLC stay cable system. The landmark bridge's stunning appearance was achieved with hybrid structures. Both the pylon and parts of the slender stiffening girder were made of S460 steel tubes filled with concrete to enhance their load-bearing and dynamic characteristics. Due to very limited construction area, a special erection process was used for the pylon involving a 200t floating crane. The stiffening girder was built with incremental launching. Cable tensioning with a curved deck proposed special design challenges. Large displacements had to be accurately predicted. To meet the strictest requirements for pedestrian comfort, TMDs were applied and dynamic load tests carried out to prove the results.

Shui Su Ravine Bridge is built in Bai Shui County in Shaanxi Province, which is a part of the highway linking Heyang and Tongchuan. The bridge has been designed as a composite steel-concrete truss bridge with 3 spans in total of 240 meters and a deck of 4 lanes. To meet the harsh environmental demand and lessen the future maintenance, the solution adopts the weathering steel Q420qENH similar strength as S420NL in European code. The bridge is erected by incremental launching and post-installation of the pre-cast concrete slab. Since the truss segment is all welded, two-step models have been developed to evaluate the fatigue performance of the steel truss joint. In the simplified two-dimensional model, Phase-Field (PF) approach has been implemented to make a full fatigue evaluation of crack propagation in the truss.

The new pedestrian footbridge at Luxembourg Train Station is an integral component of the revamped platform canopies. Its unique undulating wave design, symbolic of motion, is mirrored in the canopies' roofs, creating asynchronous waves between platforms. As the footbridge aligns with the wave, it gracefully encompasses the translucent tube of the new structure.

An integrated staircase fits beneath this architectural wave, with an elevator opposite for easy platform access. This translucent prism stands in stark contrast to the sweeping curves of the roofs and the footbridge itself.

Prioritizing user comfort and safety, a translucent design was chosen, eliminating blind spots. The 100-meter footbridge is constructed with an orthotropic steel deck, offering substantial spans with minimal height. The roof's central section serves to reduce sun exposure and conceal electrical wiring.

The assembly process involved crane work during railway track closures over consecutive weekends, using a CC3800 crane with a maximum capacity of 650 tons

The new pedestrian and bicycle bridge in Castrop Rauxel is part of the “Emscherland” project, a nature and water experience park. “Emscherland” is a joint project of the Emschergenossenschaft with the adjacent municipalities of Castrop-Rauxel, Recklinghausen, Herne and Herten.

The total length of the bridge is 412 meters, and the usable width of the pedestrian and bike path is 2.50 meters. The weight of the steel structure is 900 tons. A highlight of the assembly work is the floating-in of the bridge section (70 meters long and weighing 105 tons) over the Rhein-Herne-Canal.