bridges: history, forces, and types

Bridges: History, Forces, & Types

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The slide show describes the forces that act on a bridge and give examples of types of bridges

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Page 1: Bridges: history, forces, and types

Bridges:History, Forces, & Types

History

• The first bridges consisted of fallen logs over rivers.

History• The development of rope allowed

people to build primitive suspension bridges.

• You can see examples of this type of bridge in many movies.

Page 4: Bridges: history, forces, and types

I guarantee you have all been on one

Page 5: Bridges: history, forces, and types

• Isn’t this the same thing?

Page 6: Bridges: history, forces, and types

Who Designs them?• A Civil Engineer is a

person who designs bridges

• Civil Engineers must be strong in math and science to be able to properly design a bridge

Page 7: Bridges: history, forces, and types

Forces• Tension: A force that tries to

stretch material and pull it apart

• Compression: A force that tries to push or squeeze material together

Page 8: Bridges: history, forces, and types

More Forces• Shear: A force that tries to make

materials tear and slide by each other

• Torsion: A Force that tries to twist and bend materials

Page 9: Bridges: history, forces, and types

What happens when there is too much force on a bridge?

Page 10: Bridges: history, forces, and types

Beam Bridge

Compression

Tension

Page 11: Bridges: history, forces, and types

Truss Bridge

Compression

Tension

Page 12: Bridges: history, forces, and types

Arch Bridge

Compression

Tension

Page 13: Bridges: history, forces, and types

Suspension Bridge

Compression

Tension

Page 14: Bridges: history, forces, and types

Cable-Stay Bridge

Compression

Tension

Page 15: Bridges: history, forces, and types

Review

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