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

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

What Makes a Bridge Stay Up? Forces – 2 Types 1 st - Compression > P ushing or Squeezing Force 2 nd - Tension > P ulling or Stretching Force

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

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

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

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 Pier Cable Tower Deck

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 Abutment Deck Suspender Cable Pier

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

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

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

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

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

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

Questions?

Build a Bridge Open the Secret Envelope!