Search results
Results from the WOW.Com Content Network
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 no horizontal thrusting forces are generated, this becomes an arch-shaped truss which is essentially a bent beam – see moon bridge for an example. 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.
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.
An arch bridge with hinges incorporated to allow movement between structural elements. A single-hinged bridge has a hinge at the crown of the arch, a two-hinged bridge has hinges at both springing points and a three-hinged bridge has hinged in all three locations. [17]
Tavanasa Bridge, also known as Vorderrheinbrücke, Tavanasa is the name of the two reinforced concrete three hinged arch bridges designed by Swiss civil engineer Robert Maillart. [6] The first of these was constructed in 1904, but later destroyed by an avalanche. [7] The second, constructed in 1928 stands to this day.
Each of the river spans is made up of five Melan-type, two-hinged, reinforced-concrete arch ribs of parabolic profile. [4] The bridge's longest ribs have a center to center span of 209 feet (64 m) and a rise of 29.71 feet (9.06 m); the ribs of the other spans vary from 176.5 to 121 feet (53.8 to 36.9 m) in length, with rises from 29.2 to 19.1 ...
Robert Maillart, c. 1925. Robert Maillart (16 February 1872 – 5 April 1940) was a Swiss civil engineer who revolutionized the use of structural reinforced concrete with such designs as the three-hinged arch and the deck-stiffened arch for bridges, and the beamless floor slab and mushroom ceiling for industrial buildings.
The structural system of a high-rise building is designed to cope with vertical gravity loads as well as lateral loads caused by wind or seismic activity. The structural system consists only of the members designed to carry the loads, and all other members are referred to as non-structural.