Bridges Brian Brenner Aaron Levine Cindy Tran Some

Bridges Brian Brenner Aaron Levine Cindy Tran

Some Uses of Bridges n n n Walkways Highways/Roads Railways Pipelines Connecting lands Crossing rivers and canyons

Types of Bridges n Arch n Truss n Cantilever n Cable-Stayed n Suspension

What makes a bridge stay up? n Forces n n n Compression – a pushing or squeezing force Tension – a pulling or stretching force Demonstration n Make groups of two…

Arch Bridges n n Keystone – the wedgeshaped stone of an arch that locks its parts together Abutments – the structures that support the ends of the bridge

Arch Bridges Works by Compression n

Arch Bridges n Where have you seen these bridges?

Cold Spring Arch Bridge, Santa Barbara, CA

Marsh Rainbow Arch, Riverton, KS

Pont du Gard, Nimes, France

Cable-Stayed Bridges n n n Piers – the vertical supporting structures Cables – thick steel ropes from which the decking is suspended Decking – the supported roadway on a bridge

Cable-Stayed Bridges n Works by Tension AND Compression

Cable-Stayed Bridges n Where have you seen these bridges?

Zakim Bridge, Boston, MA

Sunshine Skyway Bridge, Tampa, FL

Sundial Bridge, Redding, CA

Suspension Bridges Similar to Cable-Stayed n Different construction method n

Suspension Bridges n Works by Tension and Compression

Suspension Bridges n Where have you seen these bridges?

Golden Gate Bridge, San Francisco, CA

Brooklyn Bridge, Brooklyn, NY

Verrazano-Narrows Bridge, New York, NY

Other Types Truss Southern Pacific Railroad Bridge, Tempe, AZ Cantilever Firth of Forth-Forth Rail Bridge, Edinburgh, Scotland

Engineering n n 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

Branches of Civil Engineering Structural – bridges, roads, buildings n Geotechnical – foundations, excavations, and tunnels n Transportation – roads, traffic control, airports n Environmental – human impact on the environment n

Other Types of Engineering Mechanical – design machines and moving parts n Electrical – design electrical equipment n Chemical – design processes for mixing chemicals n Computer – design computer hardware and software n

Questions?