bridge forces
DESCRIPTION
mmmmmmmm,,,,TRANSCRIPT
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Bridges
Brian BrennerBrian Brenner
Aaron LevineAaron Levine
Cindy TranCindy Tran
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Some Uses of BridgesSome Uses of Bridges
WalkwaysWalkways Highways/RoadsHighways/Roads RailwaysRailways PipelinesPipelines Connecting landsConnecting lands Crossing rivers and Crossing rivers and
canyonscanyons
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Types of BridgesTypes of Bridges ArchArch
TrussTruss
CantileverCantilever
Cable-StayedCable-Stayed
SuspensionSuspension
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What makes a bridge stay What makes a bridge stay up?up?
ForcesForces CompressionCompression – a – a
pushing or pushing or squeezing forcesqueezing force
TensionTension – a pulling – a pulling or stretching forceor stretching force
DemonstrationDemonstration Make groups of Make groups of
two…two…
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Arch BridgesArch Bridges
KeystoneKeystone – the – the wedge-shaped stone wedge-shaped stone of an arch that locks of an arch that locks its parts togetherits parts together
AbutmentsAbutments – the – the structures that structures that support the ends of support the ends of the bridgethe bridge
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Arch BridgesArch Bridges
Works byWorks by
CompressionCompression
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Arch BridgesArch Bridges
Where have you seen these bridges?Where have you seen these bridges?
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Cold Spring Arch Bridge, Santa Barbara, CA
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Marsh Rainbow Arch, Riverton, KS
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Pont du Gard, Nimes, France
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Cable-Stayed BridgesCable-Stayed Bridges PiersPiers – the vertical supporting structures – the vertical supporting structures CablesCables – thick steel ropes from which the – thick steel ropes from which the
decking is suspendeddecking is suspended DeckingDecking – the supported roadway on a bridge – the supported roadway on a bridge
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Cable-Stayed BridgesCable-Stayed Bridges
Works by Works by TensionTension AND AND CompressionCompression
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Cable-Stayed BridgesCable-Stayed Bridges
Where have you seen these bridges?Where have you seen these bridges?
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Zakim Bridge, Boston, MA
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Sunshine Skyway Bridge, Tampa, FL
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Sundial Bridge, Redding, CA
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Suspension BridgesSuspension Bridges
Similar to Cable-StayedSimilar to Cable-Stayed Different construction methodDifferent construction method
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Suspension BridgesSuspension Bridges
Works by Works by TensionTension and and CompressionCompression
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Suspension BridgesSuspension Bridges
Where have you seen these bridges?Where have you seen these bridges?
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Golden Gate Bridge, San Francisco, CA
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Brooklyn Bridge, Brooklyn, NY
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Verrazano-Narrows Bridge, New York, NY
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Other TypesOther Types
Truss
Southern Pacific Railroad Bridge, Tempe, AZ
Cantilever
Firth of Forth-Forth Rail Bridge, Edinburgh, Scotland
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EngineeringEngineering Engineering – the use of math and science to Engineering – the use of math and science to
solve real world problems (like crossing a river)solve real world problems (like crossing a river) Civil engineering – designing and building Civil engineering – designing and building
bridges, roadways, tunnels, buildings, dams, etc.bridges, roadways, tunnels, buildings, dams, etc.
Civil Engineer
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Branches of Civil Branches of Civil EngineeringEngineering
Structural – bridges, roads, buildingsStructural – bridges, roads, buildings Geotechnical – foundations, Geotechnical – foundations,
excavations, and tunnelsexcavations, and tunnels Transportation – roads, traffic Transportation – roads, traffic
control, airportscontrol, airports Environmental – human impact on Environmental – human impact on
the environmentthe environment
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Other Types of Other Types of EngineeringEngineering
Mechanical – design machines and Mechanical – design machines and moving partsmoving parts
Electrical – design electrical Electrical – design electrical equipmentequipment
Chemical – design processes for Chemical – design processes for mixing chemicalsmixing chemicals
Computer – design computer Computer – design computer hardware and softwarehardware and software
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Questions?Questions?