Bridges Engineering Design Mrs. Hodgson

Materials Steel Steel Beams Beams Cables Cables Connections Connections Concrete Concrete Roadway Roadway Beams Beams Stone Stone Wood Wood

What do bridges Carry? Cars, Trucks, Motorcycles, etc… Cars, Trucks, Motorcycles, etc… Trains Trains People People Pipes – gas, water, electric wires, etc… Pipes – gas, water, electric wires, etc… Extreme Loads - earthquakes/wind/impacts Extreme Loads - earthquakes/wind/impacts All of these are “Live Loads” Self-weight is “Dead Load”

Types of Bridges Girder Girder Simple spans Simple spans Continuous spans Continuous spans

Girder Bridge Simple Span Continuous Spans

Girder Bridge How many spans do you see?

Types of Bridges Girder Girder Simple spans Simple spans Continuous spans Continuous spans Truss Truss Through truss Through truss Pony truss Pony truss Deck truss Deck truss

What is a Truss?

Truss Types: Bridges Through Truss Pony Truss Deck Truss

Bridge Truss Types

Truss Bridges Top Chord Bottom Chord Diagonal Vertical

Truss Bridges

Trusses

Victory Bridge

Truss Bridges SR33 Bridge Northampton County, PA

Types of Bridges Girder Girder Simple spans Simple spans Continuous spans Continuous spans Truss Truss Through truss Through truss Pony truss Pony truss Deck truss Deck truss Arch Arch Tied arch Tied arch Fixed arch Fixed arch

Fixed Arch

Tied Arch

Arch Bridges Cold Spring Arch Bridge Santa Barbara, CA Fixed arch

Arch Bridges Birmingham Bridge Pittsburgh, PA Tied Arch Fort Duquesne Bridge Pittsburgh, PA Tied Arch

Types of Bridges Girder Girder Simple spans Simple spans Continuous spans Continuous spans Truss Truss Through truss Through truss Pony truss Pony truss Deck truss Deck truss Arch Arch Tied arch Tied arch Deck arch Deck arch Cable-stayed Cable-stayed

Cable-stayed Bridges

Sunshine Skyway Tampa Bay, FL Millau Viaduct France

Types of Bridges Girder Girder Simple spans Simple spans Continuous spans Continuous spans Truss Truss Through truss Through truss Pony truss Pony truss Deck truss Deck truss Arch Arch Tied arch Tied arch Deck arch Deck arch Cable-stayed Cable-stayed Suspension Suspension

Suspension Bridges Bay Bridge San Francisco, CA Manhattan Bridge New York, NY

Suspension Bridges Golden Gate Bridge San Francisco, CA Bronx-Whitestone Bridge New York, NY

Suspension Bridges Verrazano Narrows Bridge New York, NY Brooklyn Bridge New York, NY

Mixed Bridge Types

Brooklyn Bridge

Foundations

Questions?