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All About Bridges

All About Bridges. Bridge types, construction, and erection. Girder Bridge. A girder bridge is the most common and most basic bridge. In modern steel girder bridges,. Example: A log across a creek. the two most common girders are I-beam girders and box-girders. Arch Bridge.

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All About Bridges

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  1. All About Bridges Bridge types, construction, and erection

  2. Girder Bridge A girder bridge is the most common and most basic bridge. In modern steel girder bridges, Example: A log across a creek the two most common girders are I-beam girders and box-girders.

  3. Arch Bridge second oldest bridge type and a classic structure well suited to the use of stone. Arches use a curved structure which provides a high resistance to bending forces.

  4. Truss Bridge Mostly all beams in a truss bridge are straight. Trusses are comprised of many small beams that together can support a large amount of weight and span great distances. can serve as a distraction to drivers

  5. Cable Stayed Bridges extremely strong but very flexible A tower is erected on a continuous girder. From these towers, cables stretch down diagonally (usually to both sides) and support the girder.

  6. Rigid frame bridges (Rahmen bridges) The cross sections of the beams in a rigid frame bridge are usually I shaped or box shaped a rigid frame bridge is one in which the piers and girder are one solid structure

  7. The girder or roadway is actually hanging suspended from the main cables. The majority of the weight of the bridge and any vehicles on it are suspended from the cables. In turn the cables are held up only by the towers, there is an incredible amount of weight that the towers must be able to support. Suspension Bridges very old form of bridge

  8. Bridges in Literature Braveheart The Battle of Stirling Bridge is depicted in the 1995 film Braveheart after the novel. The director, Mel Gibson, however, chose not to depict the bridge at all in an attempt to make it more compelling cinematically.

  9. Bridge in Movie The golden gate bridge is an ironic structure. An engineering masterpiece. A triumph of human ingenuity and muscle over the elements. More people choose to end their lives at the Golden Gate Bridge than anywhere else in the world. The sheer number of deaths there is shocking but not altogether surprising. If one wants to commit suicide, there is an eerie logic in selecting a means that is almost always fatal and a place that is magically, mysteriously beautiful. The Bridge is a visual and visceral journey into one of life’s greatest taboos.

  10. Bridge Disasters Stirling Bridge • Location: Stirling, Scotland • Type: Beam • Cause: Overload by attackers during the Battle of Stirling Bridge • Effect: The Battle of Stirling Bridge was a shattering defeat for the English: it showed that under certain circumstances, where the conditions were right, infantry could be superior to cavalry.

  11. Bridge Disasters Yarmouth Bridge • Location: Great Yarmouth, United Kingdom • Type: Suspension Bridge • Cause: People crowded onto it to see a clown go down the river in a barrel pulled by geese. The weight of people shifted as the barrel passed underneath, the suspension chains on the south side snapped and the bridge deck tipped over. • Effect: Suspension chains snapped due to overload.

  12. Bridge Disasters Ashtabula River Railroad Disaster • Location: Ashtabula, Ohio, United States • Type: Wrought iron truss bridge • Cause: Possible fatigue failure of cast iron elements • Effect: One or perhaps two of the bridge designers later committed suicide. The disaster helped focus efforts to draw up standards for bridges including adequate testing and inspection.

  13. Famous Bridge 135 feet high and 200 feet wide one of London's most recognizable symbols Tower Bridge

  14. Famous Bridge one of the most famous bridges in Tokyo Eitaibashi (“Long Reign Bridge”) sharply arched wooden bridge

  15. The Rialto Bridge Famous Bridge The stone Rialto bridge replaced a previous wooden structure the oldest bridge crossing the Grand Canal in Venice. There are 2 ramps which lead up to the central portico and 2 ramps on either side

  16. Bridges and Physics • Compression is a force that acts to compress or shorten the thing it is acting on. • Tension is a force that acts to expand or lengthen the thing it is acting on. A simple, everyday example of compression and tension is a spring. When we press down, or push the two ends of the spring together, we compress it. The force of compression shortens the spring. When we pull up, or pull apart the two ends, we create tension in the spring. The force of tension lengthens the spring. • Stress: different types of materials can sustain different amounts of stress – force put on the bridge when holding up an object • Strain: the force caused by stress.

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