Suspension bridge Totally Explained

Everything about Suspension Bridges totally explained

ť This article is concerned with a particular type of suspension bridge, the suspended-deck type.:For an index to the several types see suspension bridge types.

   For the Gladiators event, see Suspension Bridge (Gladiators). A suspension bridge is a type of bridge where the main load-bearing elements are hung from suspension cables. While modern suspension bridges with level decks date from the early 19th century, earlier types are reported from the 3rd century BC. Simple suspension bridges, for use by pedestrians and livestock, are still constructed, based upon the ancient Inca rope bridge.
   Suspended well from two high locations over a river or canyon, simple suspension bridges follow a shallow downward arc and are not suited for modern roads and railroads. Advances in materials and design led to the development of the suspended-deck suspension bridge, a modern bridge capable of carrying vehicles and light rail. Instead of the deck following the downward arc of the main load-bearing cables (or chains), these cables are suspended between towers, and vertical suspender cables carry the weight of the deck below, upon which traffic crosses. This arrangement allows the deck to be level or to arc slightly upward for additional clearance.
   The suspension cables must be anchored at each end of the bridge, since any load applied to the bridge is transformed into a tension in these main cables. The main cables continue beyond the pillars to deck-level supports, and further continue to connections with anchors in the ground. The roadway is supported by vertical suspender cables or rods, called hangers. In some circumstances the towers may sit on a bluff or canyon edge where the road may proceed directly to the main span, otherwise the bridge will usually have two smaller spans, running between either pair of pillars and the highway, which may be supported by suspender cables or may use a truss bridge to make this connection. In the latter case there will be very little arc in the outboard main cables.
History
The suspension bridge is one of the oldest types of bridge. Early simple, or catenary, suspension bridges consisted of three or more cables made from vines, where people walked directly on the ropes to cross. Simple suspension bridges with decking made from planks resting on two cables date back at least to 285BC; James Smith’s Micklewood Bridge ; and a proposal by Robert Stevenson for a bridge over the River Almond near Edinburgh The eastern portion (a cantilever bridge) is currently being replaced with a self-anchored suspension bridge which will be the longest of its type in the world.
Tacoma Narrows Bridge (USA), 853 m — 1950 & 2007. The largest twin suspension bridge in the world.
Infamous suspension bridges

The Bridge of San Luis Rey (Fictional)
Silver Bridge, a 1928 eyebar chain bridge that collapsed in 1967, killing forty-six people.
Tacoma Narrows Bridge, (USA), 853 m — 1940. The Tacoma Narrows are prone to sustained and moderately strong winds, with which the bridge had a tendency to resonate (owing to its unique plate-girder deck structure and ultimately its nickname “The Galloping Gertie”). This led to its collapse only months after completion. The collapse was captured on film.
Picture Gallery
Image:Akashi-kaikyo_bridge_night_shot_small.jpg‎|Akashi-Kaikyo Bridge at night Image:Ponte_25_Abril_Lisboa.JPG‎|25 de Abril Bridge in Lisbon, Portugal Image:Tacoma_Narrows_Bridge_Falling.png‎|A suspension bridge falls: Tacoma Narrows Bridge collapses Image:AmbassadorBridgesunsetting1.jpg|The Ambassador Bridge — Longest suspension bridge from 1929–1931. Image:Brooklyn Bridge Postdlf.jpg|New York’s famous Brooklyn Bridge Image:SF-Oakland-Bay-Bridge-Construction.jpg|San Francisco–Oakland Bay Bridge under construction Image:Great Belt Bridge JvdC.jpg|Driving on the 2nd largest suspension bridge, Denmark’s Great Belt Bridge (Storebæltsbroen). Image:Gwangan_Grand_Bridge.JPG|Busan, the Republic of Korea’s Gwangan Grand Bridge, with a suspension section of around 500 meters but with an overall length of 7,420 meters Image:Golden Gate Bridge Aerial.jpg|The famous Golden Gate Bridge in San Francisco Image:Ortakoey Istanbul Bosporusbruecke Mrz2005.jpg|Ortaköy Mosque and the Bosphorus Bridge in Istanbul Image:Brooklyn Bridge by David Shankbone.jpg|Brooklyn Bridge with Manhattan Bridge in background Image:SFOakBrWestPartVEast.jpg|Western portion of the San Francisco-Oakland Bay Bridge — two bridges with a common central anchorage Image:Sc pt hercilio luz3.jpg|Hercilio Luz Bridge, Florianópolis, Brazil Image:GoldenGateBridge.jpg|Golden Gate Bridge, California, USA Further Information
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