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Stuttgart, Germany

Anistoroaiei C.,Beratende Ingenieure VBI GmbH | Brand W.,DYWIDAG Systems International GmbH | Langer S.,Hermann Kirchner Hoch und Ingenieurbau GmbH | Puls J.,Donges SteelTec GmbH
Stahlbau | Year: 2013

On the fi rst of November was the last steel segment of the main span of the new bridge over the Elbe near Schönebeck successfully lifted. The new bridge has a total length of 1128.50 m and a mainspan of 185 m built as a single tower cable-stayed Bridge. Source

By the construction of the A44 between the junction Ratingen-East and the expansion of existing end of the A44 in Velbert is a continuous east west link between the Rhine and the Ruhr area created. To convert several rural roads and the Gansbach a 3-span bridge structure with individual spans of 64 m - 80 m - 64 m and a total span of 208 m is necessary. The valley is crossed at a height of up to 35 m. © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

40 years after its construction, the 302 m long Windelbach viaduct undergoes repairs, which requires a renewal of the superstructure on to be rehabilitated pillars. At this a modern compositesteel-superstructure replaces the existing prestressed concrete beams. Due to the topographical conditions and the conditions for maintaining a 4+0 traffic an innovative assembly method with heavy-duty rail-trolleys to mount the new composite steel boxes and removal of existing prestressed concrete beams has been developed (fig. 1). Source

In bolted connections the shear load is calculated with the cross section of the bolt. It is important whether the shank or the thread is in the shear plane. In the new code for bolts DIN EN 14399-4 the dimension of the bolts are modified. Compared to the previous code, the DIN 6914, in many situations the thread is closer to the shear plane or even in the shear plane. In the current standards there is no requirement about how long the shank has to protrude into the shear plane. Tests were performed to assess the ultimate load of bolts in shear connections with different positions of the shear plane. In the paper the differences of the codes DIN 6914 and DIN EN 14399-4 are shown and the results of the tests are presented. © Ernst & Sohn Verlag fü Architektur und Technische Wissenschaften GmbH & C. KG, Berlin. Source

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