truss arch bridge
Information about truss arch bridge
| Truss arch bridge | |
|---|---|
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| Garabit Viaduct, a thrust arch type employing a catenary shape | |
| Ancestor | Truss bridge, arch bridge |
| Related | None |
| Descendant | Compression arch suspended-deck bridge |
| Carries | Pedestrians, vehicles, light rail, heavy rail |
| Span range | Medium |
| Material | structural steel |
| Movable | No |
| Design effort | Medium |
| Falsework required | Sometimes, but long spans are often built using temporary cantilevers |
A truss arch bridge combines elements of the truss bridge and the arch bridge. The actual resolution of forces will depend upon the design. If no horizontal thrusting forces are generated this becomes an arch-shaped truss, 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 a three-hinged arch - see The Iron Bridge for an example. 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. Such a wood structure uses closely fitted beams pinned together, so the members within the frames are not free to move relative to one another, as they are in a pin-jointed truss structure that allows rotation at the pin joint. Such rigid structures (which impose bending stresses upon the elements) were further developed in the 20th century as the Vierendeel truss.
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The steel Stoney Creek Bridge carries the Canadian Pacific Railway
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The Iron Bridge, a three-hinged arch and the first metal bridge
Some bridges of this type
- The Iron Bridge (1791), the first metal bridge of any kind, still standing.
- Maria Pia Bridge (1877), Gustave Eiffel's pioneering two-hinge arch.
- Navajo Bridge An older (1929) and newer (1995) bridge of the same general construction, each built as unsupported cantilevers joined with a central pin.
- I-35W Mississippi River bridge (1967) bridge that collapsed in 2007 in Minneapolis, Minnesota, USA.
The Garabit Viaduct (Viaduc de Garabit in French) is a railroad arch bridge spanning the Truyère river near Ruynes-en-Margeride (), Cantal, France, in the mountainous Massif Central region.
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catenary is the shape of a hanging flexible chain or cable when supported at its ends and acted upon by a uniform gravitational force (its own weight). The chain is steepest near the points of suspension because this part of the chain has the most weight pulling down on it.
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A truss bridge is a bridge composed of connected elements (typically straight) which may be stressed from tension, compression, or sometimes both in response to dynamic loads. Truss bridges are one of the oldest types of modern bridges.
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An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side.
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A compression arch suspended-deck bridge, or through arch bridge, is a bridge made from modern materials such as steel or reinforced concrete in which a compression arch rises above the deck. Cables connect the deck to the arch.
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pedestrian is a person travelling on foot, whether walking or running. In modern times, the term mostly refers to someone walking on a road or footpath, but this was not the case historically.
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History
Walking is the primary means of human locomotion...... Click the link for more information.
Vehicles are non-living means of transport. They are most often man-made (e.g. bicycles, cars, motorcycles, trains, ships, and aircraft), although some other means of transport which are not made by man can also be called vehicles; examples include icebergs and floating tree trunks.
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Light rail or light rail transit[1] (LRT) is a form of rail transport system that generally uses electric rail cars[2] on private rights-of-way or sometimes in streets. Light rail is a step below rapid transit, which is fully grade-separated.
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The term heavy rail is often used for regular railways, to distinguish from systems such as trams, light rail, medium capacity system, and metro.
Heavy rail typically refers to the standard inter-city rail network, which is built to be robust enough for heavy and high-speed
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Heavy rail typically refers to the standard inter-city rail network, which is built to be robust enough for heavy and high-speed
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Structural steel is steel construction material, a profile, formed with a specific shape or cross section and certain standards of chemical composition and strength. Structural steel shape, size, composition, strength, storage, etc, is regulated in most industrialised countries.
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Falsework refers to temporary structures used in construction to support spanning or arched structures in order to hold the component in place until its construction is sufficiently advanced to support itself.
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bridge is a structure built to span a gorge, valley, road, railroad track, river, body of water, or any other physical obstacle. Designs of bridges will vary depending on the function of the bridge and the nature of the terrain where the bridge is to be constructed.
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A truss bridge is a bridge composed of connected elements (typically straight) which may be stressed from tension, compression, or sometimes both in response to dynamic loads. Truss bridges are one of the oldest types of modern bridges.
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An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side.
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In physics, force is an action or agency that causes a body of mass m to accelerate. It may be experienced as a lift, a push, or a pull. The acceleration of the body is proportional to the vector sum of all forces acting on it (known as net force or resultant force).
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A moon bridge is a highly arched pedestrian bridge, which in its wooden form may require the walker to initially climb (as one would a ladder) and also when descending. This type is associated with gardens in China and Japan The moon bridge was originally designed as a means to
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apex is a descriptive label for a visual singular highest or most distant point or vertex in an isosceles triangle, pyramid or cone, usually contrasting with the opposite side called the base. For an isosceles triangle the apex is the vertex where the two sides of equal length meet.
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Iron Bridge crosses the River Severn at the Ironbridge Gorge, by the village of Ironbridge, in Shropshire, England. It was the first bridge of its size to be made out of cast iron.
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Iron Bridge crosses the River Severn at the Ironbridge Gorge, by the village of Ironbridge, in Shropshire, England. It was the first bridge of its size to be made out of cast iron.
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The Maria Pia bridge (Ponte Maria Pia) is a railway bridge built in 1877 by Gustave Eiffel in Porto, Portugal. Built of wrought iron, its two-hinged crescent arch carries the railway line to Lisbon for 353m across the River Douro at a height of 60m.
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Alexandre Gustave Eiffel
Personal information
Name Alexandre Gustave Eiffel
Nationality French
Birth date November 15 1832
Birth place Dijon, Côte-d'Or, France
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Personal information
Name Alexandre Gustave Eiffel
Nationality French
Birth date November 15 1832
Birth place Dijon, Côte-d'Or, France
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Nearest city: Lee's Ferry, Arizona
Coordinates: _ ]
Built/Founded: 1927
Architect: Arizona Highway Dept.; Et al.
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Coordinates: _ ]
Built/Founded: 1927
Architect: Arizona Highway Dept.; Et al.
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I-35W Mississippi River bridge was an eight-lane, 1,907 feet (581 m) steel truss arch bridge that carried Interstate 35W across the Mississippi River in Minneapolis, Minnesota, United States.
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