ENGINEERING/TECHNOLOGY ALL ABOUT BRIDGES
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ENGINEERING/TECHNOLOGY ALL ABOUT BRIDGES Students Click Here Teachers Click Here
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ENGINEERING/TECHNOLOGY ALL ABOUT BRIDGES . Students Click Here Teachers Click Here. Teacher Information . This activity is for junior high aged students. This activity is to be used as an introduction about basic bridges and how they work. - PowerPoint PPT Presentation
Transcript of ENGINEERING/TECHNOLOGY ALL ABOUT BRIDGES
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The Truss Bridge This is the most commonlook for atruss bridge.
Types of Bridges(Click on Type to learn more)
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4.)Truss BridgeArch BridgeSuspension BridgeBeam BridgeStraight to QuizQuestion 10Which bridge is your favorite bridge?
A.)Suspension BridgeB.)Arch Bridge C.)Truss BridgeD.) Beam BridgeQuestion 1Which bridge is the most simple type?
A.) Suspension Bridge B.) Arch Bridge C.) Beam Bridge D.) Truss Bridge
The Beam Bridge This is the most commonlook for a beam bridge.
What is a Beam Bridge?Consists of a horizontal flat beam supported at each end by piers. The weight of the beam pushes straight down on the piers. The farther apart the piers, the weaker the beam becomes. Beam bridge pier sections rarely span more than 250 feet.The simplest form of a bridge.
BeamPiersBeam Bridge DescriptionClick here to learn about the next bridgeAbout a Truss BridgeConsists of an assembly of triangles.
Truss bridges are commonly made from a series of straight, steel bars.
Rigid arms extend from both sides of two piers.How Does A Truss Bridge Work?Diagonal steel bars, projecting from the top and bottom of each pier, hold the arms in place.The arms that project toward the middle are only supported on one side, like really strong diving boards.These "diving boards," called cantilever arms, support a third, central span.
There all kinds of different truss designs. The more triangles there are in a design the heavier a load it can handle. The weight is evenly spread on each beam to its pier.
Cantilever ArmsPiersBeamsTruss Bridge Description Click here to learn about the next bridgeAbout The Arch BridgeOne of the oldest types of bridges and have been around for thousands of years. Arch bridges have great natural strength.Originally built of stone or brick, but these days are built of reinforced concrete or steel.The top of the arch is called the key stone.
How Does The Arch Bridge Work?Instead of pushing straight down, the load of an arch bridge is carried outward along the curve of the arch to the supports at each end. The weight is transferred to the supports at either end.
Key Stone
These supports, called the abutments, carry the load and keep the ends of the bridge from spreading out.
About The Suspension BridgeSuspension bridges use a box section roadway supported by high tensile strength cables. Cables are made of thousands of individual steel wires bound tightly together.Steel is very strong when under pressure, just a single .1 inch wire can hold half a ton. Tend to be most expensive bridge.Suspension bridges can span distances from 2,000 to 7,000 feet far longer than any other kind of bridge.
How Does A Suspension Bridge Work?A suspension bridge suspends the roadway from huge main cables, which extend from one end of the bridge to the other. These cables rest on top of high towers and have to be securely anchored into the bank at either end of the bridge.The towers enable the main cables to be draped over long distances. ContinuedMost of the weight or load of the bridge is transferred by the cables to the anchorage systems. These are imbedded in either solid rock or huge concrete blocks.
Inside the anchorages, the cables are spread over a large area to evenly distribute the load and to prevent the cables from breaking free.
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Click here to go back and reviewCORRECT!!!Awesome Job! Keep up the good work and you will be done in no time!
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CORRECT!!!Awesome Job! Keep up the good work and you will be done in no time!
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CORRECT!!!Awesome Job! Keep up the good work and you will be done in no time!
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CORRECT!!!Awesome Job! Keep up the good work and you will be done in no time!
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CORRECT!!!Awesome Job! Keep up the good work and you will be done in no time!
To move on to the next question CLICK HERE
CORRECT!!!Awesome Job! Keep up the good work and you will be done in no time!
To move on to the next question CLICK HERE
CORRECT!!!Awesome Job! Keep up the good work and you will be done in no time!
To move on to the next question CLICK HERE
CORRECT!!!Awesome Job! Keep up the good work and you will be done in no time!
To move on to the next question CLICK HERE
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You Completed The ActivityWith A 100% Fantastic!!!!
ConclusionIn conclusion watch this video that will be a review of everything you learned!
http://www.youtube.com/watch?v=d1RNUb3TXWg&feature=channel_video_title
REFRENCES http://www.swe.org/iac/lp/bridge_03.html
http://science.howstuffworks.com/engineering/civil/bridge.htm
http://www.transportation.wv.gov/COMMUNICATIONS/BRIDGE_FACTS/Pages/default.aspx
