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Bridges. Brian Brenner Aaron Levine Cindy Tran. Some Uses of Bridges. Walkways Highways/Roads Railways Pipelines Connecting lands Crossing rivers and canyons. Types of Bridges. Arch Truss Cantilever Cable-Stayed Suspension. What makes a bridge stay up?. Forces

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Bridges l.jpg

Bridges

Brian Brenner

Aaron Levine

Cindy Tran


Some uses of bridges l.jpg
Some Uses of Bridges

  • Walkways

  • Highways/Roads

  • Railways

  • Pipelines

  • Connecting lands

  • Crossing rivers and canyons


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Types of Bridges

  • Arch

  • Truss

  • Cantilever

  • Cable-Stayed

  • Suspension


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What makes a bridge stay up?

  • Forces

    • Compression – a pushing or squeezing force

    • Tension – a pulling or stretching force

  • Demonstration

    • Make groups of two…


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Arch Bridges

  • Keystone – the wedge-shaped stone of an arch that locks its parts together

  • Abutments – the structures that support the ends of the bridge


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Arch Bridges

  • Works by

    Compression


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Arch Bridges

  • Where have you seen these bridges?





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Cable-Stayed Bridges

  • Piers – the vertical supporting structures

  • Cables – thick steel ropes from which the decking is suspended

  • Decking – the supported roadway on a bridge


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Cable-Stayed Bridges

  • Works by Tension AND Compression


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Cable-Stayed Bridges

  • Where have you seen these bridges?





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Suspension Bridges

  • Similar to Cable-Stayed

  • Different construction method


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Suspension Bridges

  • Works by Tension and Compression


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Suspension Bridges

  • Where have you seen these bridges?





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Other Types

Truss

Southern Pacific Railroad Bridge, Tempe, AZ

Cantilever

Firth of Forth-Forth Rail Bridge, Edinburgh, Scotland


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Engineering

  • Engineering – the use of math and science to solve real world problems (like crossing a river)

  • Civil engineering – designing and building bridges, roadways, tunnels, buildings, dams, etc.

Civil Engineer


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Branches of Civil Engineering

  • Structural – bridges, roads, buildings

  • Geotechnical – foundations, excavations, and tunnels

  • Transportation – roads, traffic control, airports

  • Environmental – human impact on the environment


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Other Types of Engineering

  • Mechanical – design machines and moving parts

  • Electrical – design electrical equipment

  • Chemical – design processes for mixing chemicals

  • Computer – design computer hardware and software



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