Building Bridges: Initial Research Webquest

earthwhistleUrban and Civil

Nov 25, 2013 (3 years and 6 months ago)

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Building Bridges: Initial Research Webquest

Load the following Page to begin :
http://apphysicsb.homestead.com/bridge.html

Part I: Bridge Types

Basic Bridge Types
:
http://pghbridges.com/basics.htm

Bridge Basics:
http://www.pbs.org/wgbh/buildingbig/bridge/basics.html

How Bridges Work:
http://science.howstuffworks.com/engineering/civil/bridge.htm

Major Bridges: Record Spans:

The three primary families of bridges are:

a. Beam or Girder: Truss bridges

b. Suspension:

Cable Stayed

Suspended

c. Arch: Wood, Stone or Steele


1
. For each type of bridge include the following information:

-

Main Characteristics (use your own words)

-

Two examples of each type bridge giving name, location and span.


Part II: Bridge Termino
logy

PBS:

Building Big: Forces Lab

FORCES


2. Define the following terms in your own words:




a. Compression




b. Tension




c. Buckling




d. Bending




e. Shear




f. Torsion


LOADS

There are seven different types of loads that can affect a bridge.



3. Name and briefly describe each type of load.

4. Try each load and describe what
can be done to strengthen the
bridge.


MATERIALS

This section presents 8 different materials that could be used in a bridge.


5. Compare and contrast the use of the following materials

regarding its cost to weight ratio, load performance and variety of
applications:




a. Concrete vs Reinforced concrete




b. Steel vs cast iron


PART III. BUILD A BRIDGE


NOVA Super Bridge

Follow this interactive activity step
-
by
-
step and answer
the questions



6. How do the abutments support arch bridges?


7. Discuss the issues related to span in beam bridges.



8a. What are the advantages of using pre
-
stressed concrete?





b. Briefly describe the elaboration process.


9. What are the main differences between Cable
-
Stayed bridges and

Suspension bridges?


10. What are some of the advantages of Cable
-
Stayed bridges over
other types of Suspension bridges?


11. Play the game and write your results:


Site


Bridge Type


Bay


Freeway


River


Canyon