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A fixed arch bridge, that is one without hinges, exerts a bending moment at the abutments and stresses caused by change of temperature or shrinkage of concrete have to be taken up by the arch. A two-hinged arch has a hinge at the base of each arch (the springing point), while a three-hinged arch has a third hinge at the crown of the arch. [3]
If horizontal thrust is generated but the apex of the arch is a pin joint, this is termed as a three-hinged arch. If no hinge exists at the apex, it will normally be a two-hinged arch . In the Iron Bridge shown below, the structure of each frame emulates the kind of structure that previously had been made of wood .
For example, his Crestawald Bridge (1959) was a reinforced concrete bridge with a two-hinged arch. [4] But with the revolutionary new material — prestressed concrete — Menn saw that prestressing could actually replace the arch itself. The prestressed deck of his arch bridge could become the main supporting member without the arch.
The Whirlpool Rapids Bridge, commonly known as the Whirlpool Bridge or the Lower Steel Arch Bridge (before 1937), is a spandrel braced, riveted, two-hinged arch bridge that crosses the Canada–United States border, connecting the commercial downtown districts of Niagara Falls, Ontario, and Niagara Falls, New York.
The two-hinged arch bridge was designed by Charles C. Schneider and Wilhelm Hildenbrand, with modifications to the design made by the Union Bridge Company, William J. McAlpine, Theodore Cooper, and DeLemos & Cordes, with Edward H. Kendall as consulting architect. The bridge features steel-arch construction with two 510-foot (160 m) main arches ...
The three-hinged arch is not only hinged at its base, like the two-hinged arch, yet also at its apex. The additional apical connection allows the three-hinged arch to move in two opposite directions and compensate for any expansion and contraction. This kind of arch is thus not subject to additional stress from thermal change. Unlike the other ...
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Download QR code; Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; ... Three-hinged arch; Three-pinned arch; Transverse rib;