Bridges from all over the world
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Bridges from all over the World!. By: Maria Peloro & Christine Sniffen Bridges powerpoint project 2 nd period science. Historical Facts.

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Bridges from all over the World!

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Bridges from all over the world

Bridges from all over the World!

By: Maria Peloro & Christine Sniffen

Bridges powerpoint project

2nd period science


Historical facts

Historical Facts

  • The very first bridge were in fact created by nature. If a tree fell over a large ditch, people and animals could easily cross without having to travel longer.


Historical facts1

Historical facts

  • The second bridges were made by humans and were probably spans of wooden logs or planks and eventually stones, using a simple support and crossbeam araangement.


Historical facts2

Historical facts

  • The first man-made bridges were made out of wood, used to get over small streams. Sooner or later they found out that they can get across longer streams by adding more supports.


Historical facts3

Historical facts

  • In the beginning of the Middle Ages a little bit more proggress in bridge engineering began. The Gothic Arch was used, and it was a lot easier to construct because there was less load on the wooden centering while being built.


Historical facts4

Historical facts


Historical facts5

Historical facts


Historical facts6

Historical facts


Historical facts7

Historical facts


Historical facts8

Historical facts


Historical facts9

Historical facts


Type of bridge structure

Type of Bridge Structure

  • Beam bridge

    Beam Bridges are the simplest type of bridge today.

    They are the direct descendent from the log bridge. It

    is used often in pedestrian bridges and for

    highway overpasses. Beam bridges are made of

    one horizontal beam with two supports usually on

    either end. Theses free standing bridges are usually

    built as a walkway or even for decoration.


Types of bridge structures

Types of bridge structures

  • Cantiveler Bridge

    A cantilever bridge is a bridge built

    using cantivelers, structures that project horizontally

    into space, supported on only one end. For small

    footbridges,the cantilevers may be simple beams; however,

    large cantilever bridges designed to handle road or rail

    traffic use trusses built from stuctual steel, or box girders

    built from prestressed concrete.


Types of bridge structures1

Types of bridge structures

  • Arch Bridge

    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.


Types of bridge structures2

Types of Bridge Structures

  • Suspension Bridges

    A suspension bridge is any type of bridge that makes

    significant use of tension rather than or in addition to

    compression. A suspension bridge usually has cables

    (else ropes or chains), anchored at each end of the

    bridge. Any load applied to the bridge is transformed

    into a tension in these main cables


Types of bridge structures3

Types of Bridge Structures

  • Truss Bridges

    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. A truss bridge is

    economical to construct owing to its efficient use of

    materials.


Bridges that currently exist

Bridges that currently exist

  • Verezzano Bridge

    The Verrazano-Narrows Bridge is a double-decked

    suspension bridge that connects the boroughs of

    Staten Island and Brooklyn on Long Island in New

    York City. The bridge is named after an Italian explorer

    named Giovanni de Verezzano, the first known European

    navigator to enter New York and the Hudson River, while

    crossing The narrows...

    continue for more info


Verezzano bridge continue

Verezzano Bridge continue...

Official Name: Verezzano- Narrow Bridge

Carries: 12 total lanes (6 lanes upper and 6 lanes lower) of I-278

Locale: New York City (Staten Island –Brooklyn)

Vertical Clearence:

15 feet- 4.6meters (the upper level)

14.4 feet- 4.4 meters (the lower level)

Opening Date:

November 21, 1964 (the upper level)

June 28, 1969 (the lower level)

Toll: $10.00 as of 16 March 2008, discount available with E-Z Pass


Bridges that currently exist1

Bridges that currently exist

  • The Golden Gate

    The Golden Gate Bridge is a suspenision bridge spanning the

    Golden Gate, the opening of the San Francisco Bay onto the

    Pacific Ocean. As part of both U.S. Route 101and State Route1, it

    connects the city of San Francisco on the northern tip of

    the San Francisco Penninsula to Marin County. The Golden

    Gate Bridge was the Longest suspension bridge span in the world

    when it was completed during the year 1937, and has become

    an internationally recognized symbol of San Francisco and also

    California.


Golden gate continue

Golden Gate Continue...

Official name: The Golden Gate

Carries: 6 lanes US 101/ SR1, pedestrians and bicycles.

Locale: San Francisco, California and Marin County, California

Total Length: 8,981 Feet 2,737 meters

Width: 90 feet

Height: 746 feet

Opening date: May 27, 1937

Toll: $6.00 (southbound) (US $5.00 with Fas Trak


Bridges that currently exist2

Bridges that currently exist...

  • The London Bridge

    London Bridge is a bridge between the City of London and

    Southwark in London, England, over the Thames River. On

    The south side of the bridge are Southwark Cathedral and

    London Bridge Station; on the north side are the Monument

    to the Great Fire of London and Monument Tube Station.


London bridge continue

London Bridge Continue...

Official name: London Bridge

Locale: Inner London

Carries: 5 lanes

Crosses: Thames River

Longest Span: 104 Meters- 340 feer

Total Length: 262 meters-860 feet

Clearence Below: 8.9 meters-29 feet

Opening Date: March 17, 1973


Links

Links

  • http://farm3.static.flickr.com/2410/2530160763_c362bdb7a8.jpg

  • http://en.wikipedia.org/wiki/Beam_bridge

  • http://en.wikipedia.org/wiki/Cantilever_bridge

  • http://en.wikipedia.org/wiki/Arch_bridge

  • http://en.wikipedia.org/wiki/Suspension_bridge

  • http://en.wikipedia.org/wiki/Truss_bridge

  • http://images.google.com.bo/images?gbv=2&hl=es&safe=active&q=Verezzano+Bridge&sa=N&start=0&ndsp=20

  • http://en.wikipedia.org/wiki/Verrazano-Narrows_Bridge

  • http://en.wikipedia.org/wiki/Golden_Gate_Bridge

  • http://en.wikipedia.org/wiki/London_Bridge

  • http://www.ask.com/bar?q=timeline+of+bridges&page=1&qsrc=0&ab=4&u=http%3A%2F%2Fwww.civl.port.ac.uk%2Fcomp_prog%2Fbridges%2Fmain%2Fpage2.html


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