Bridges Prof Anthony Cioffi P E ProfessorChairman New

Bridges Prof. Anthony Cioffi, P. E. Professor/Chairman New York City College of Technology/CUNY

How are Bridges Used? • • Walkways Highways/Roads Railways Pipelines Connecting Lands Crossing Rivers Stadiums Roofs

§ Arch Types of Bridges § Truss § Cantilever § Cable-Stayed § Suspension § Beam § Moveable

What Makes a Bridge Stay Up? • Forces – 2 Types 1 st - Compression > Pushing or Squeezing Force 2 nd - Tension > Pulling or Stretching Force

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

Arch Bridges • How Does it Work ? “Compression”

Arch Bridges • Where have you seen these bridges? Bayonne Bridge – N. J. Sydney Harbor Bridge Hoover Dam Bridge Apollo Bridge - Slovakia

Steel Arch Bridge • Where have you seen these bridges? High Bridge (officially, the Aqueduct Bridge) Bronx, N. Y.

Hell Gate Arch Bridge, New York, Connecting Railroad Bridge from Queens

Cable-Stayed Bridges • Piers – Supports the Towers • Towers – Support the Cables • Cables – Thick Steel Ropes from which the decking is suspended • Decking – Supports the Roadway Cable Tower Deck Pier

Cable-Stayed Bridges • How does it Work? Tension & Compression

Cable-Stayed Bridges • Where have you seen these bridges? Abdoun Bridge – Amman, Jordan Puente de la Unida – Mexico Octavio Frias de Oliveira Bridge São Paulo - Brazil.

Zakim Bridge, Boston, MA

Sunshine Skyway Bridge, Tampa, FL

Suspension Bridges • Similar to Cable-Stayed > Uses Cables for Support Tower Cable Suspender Cable Deck Pier Abutment

Suspension Bridge • How does it Work? Tension & Compression

Suspension Bridges • Where have you seen these bridges? Akashi Kaikyo Bridge - Japan Golden Gate Bridge – San Francisco Chesapeake Bay Bridge Virginia

Brooklyn Bridge, Brooklyn, NY

Verrazano-Narrows Bridge, New York City

Truss Bridge Support (Abutment)

Truss Bridges • How does Work? Tension& Compression

Truss Bridges • Where have you seen these bridges? Francis Scott Key Bridge Maryland, USA Betsy Ross Bridge – Philadelphia, PA

Under Truss Bridge

Truss Connections NY-79 Bridge Broome County, New York Warren

Cantilever Bridge • Where have you seen these bridges? Firth of Forth-Forth Rail Bridge Edinburgh, Scotland Bluewater Bridge -Port Huron Michigan

Pierre Pflimlin Bridge - France 59 th Street Bridge – N. Y. C.

Beam Bridge • Where have you seen these bridges? Chesapeake Bay Bridge-Tunnel

Moveable Bridges Bascule Bridge Woodrow Wilson Bridge-Virginia Swing Bridge London Bridge Lift Bridge

Questions?

Build a Bridge Open the Secret Envelope!