Tied-arch bridge

As long shear beam in an anchored itself arch bridge is called. The type of construction, also called tied arch bridge or reinforced beams, was invented by the Austrian Josef Langer and patented in 1859 in Vienna. She came for the first time in 1881 at the Graz Mur Bridge on the application.

The construction consists of a combination of the supporting action of an underlying beam ( supporting beam ) and an overlying thin sheet on which the bar is attached to rods. The arch is anchored in the beam, causing the beam acts as a tieback. The bow usually has a stitch between the ninth and sixth of its span. The number of trailer moves usually 6 to 14, with aesthetic reasons usually an even number is preferred. Most two parallel sheets are arranged laterally adjacent to the roadway. For wide roads but also three are possible in the Danube bridge fishing village however, there is only one sheet in middle of the bridge.

For an evenly distributed load of Langersche bar is through the arch support effect a very economical design, unevenly distributed loads cause mainly bending stresses of the beam. It finds its application mostly in larger spans, where the height difference between the road surface and the upper edge of design bottom edge should be as small as possible. As a rule, there is a long shear beams made ​​of steel.

With 256 meter span bridge of solidarity is the most expansive bridge of this type of construction in Germany. When first built in Germany, large deck arch bridge is the Eider bridge in Friedrichstadt. Was completed, the bridge 1916.

In river bridges often comes the construction procedure of Brückeneinschwimmens apply.