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A self-anchored suspension bridge is a suspension bridge type in which the main cables attach to the ends of the deck, rather than directly to the ground or via large anchorages. [1] The design is well-suited for construction atop elevated piers, or in areas of unstable soils where anchorages would be difficult to construct.
If the spandrel is solid, usually the case in a masonry or stone arch bridge, the bridge is called a closed-spandrel deck arch bridge. If the deck is supported by a number of vertical columns rising from the arch, the bridge is known as an open-spandrel deck arch bridge. The Alexander Hamilton Bridge is an example of an open-spandrel arch ...
Simple suspension bridge: the earliest known type of suspension bridge, and usually a footbridge. The deck is flexible and lies on the main cables, which are anchored to the earth. Underspanned suspension bridge: an early 19th-century descendant of the simple suspension bridge. The deck is raised on posts above the main cables.
An unreinforced concrete arch is technically a masonry arch that use only very small stones, that is the aggregate of the concrete, sand and gravel. Such an arch would not stand without mortar. Some modern bridges are built masonry style with precast concrete blocks, like Gladesville Bridge that has a span of 305 metres (1000 ft). These types ...
The bridge deck is supported by a third structural element hanging underneath. They are named for the German engineer Hermann Lohse (1815–1893) who developed them in the late 19th century. The correct name of tied arch bridges with inclined hangers that cross each other at most once is Nielsen bridge.
The deck is connected to the arch by 12 pairs of vertical hangers at the arches and the deck intersection point, 60 m from the centre of the bridge, rigidly joined by a cross brace. Each arch is embedded at the ends in a reinforced concrete block (the smallest being 6 m long, 7 m high and 5 m wide) connected by means of a joint of 28 steel bars ...
In an underspanned suspension bridge, also called under-deck cable-stayed bridge, [21] the main cables hang entirely below the bridge deck, but are still anchored into the ground in a similar way to the conventional type. Very few bridges of this nature have been built, as the deck is inherently less stable than when suspended below the cables.
The bridge has a main span of 37 metres, and a total length of 55.6m. [2] The arch is polygonal rather than curved, and is only 200 mm thick. [3] It supports the bridge deck via 160 mm thick reinforced concrete cross walls. The deck is thicker than the arch, and is stiff enough to prevent the slender arch from buckling. The highway deck is ...