Engineering Structures Lesson 6

Lesson 6 Bridge Structures

Build Skyscraper Version 1

Pg 21-22

Please do experiment 13 on Page 22

Multiple Select

What happened when you tested the Skyscraper?

• It fell over

• It moved around

• Nothing

• It Broke

Build Skyscraper Version 2

Pages 23-24

Drag and Drop

Build the tallest Skyscraper but make sure it is still Strong enough to withstand ​loads such as

Placeholder

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Placeholder

Drag these tiles and drop them in the correct blank above

earthquakes

wind

insects

wild animals

fire

Pages 25-27



You will do experiment 15

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Build the Deck Arch Bridge

Multiple Choice

What keeps the arch from collapsing?

• It is strong

• The material it is made from

• It has an internal or external structure that counteracts the outward force at the base

• The weight is not great enough to over balance it and cause it to collapse

pages 28-29

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Build the Tied Arch Bridge

Multiple Choice

What is another name for the tied arch bridge?

• Round Arch

• Bowstring Arch

• Curved Arch

• cantilever

Tensegrity

Multiple Choice

What is the correct definition for tensegrity?

• a measure of the force that can cause an object to rotate about an axis. Just as force is what causes an object to accelerate in linear kinematics,

• is the pulling or stretching force transmitted axially along an object such as a string, rope, chain, rod, truss member, or other object

• a structural principle based on a system of isolated components under compression inside a network of continuous tension, and arranged in such a way that the compressed members (usually bars or struts) do not touch each other

Structural Elements

Page 31

Fill in the Blanks

The shape that the string forms naturally under its own weight is called a

. (HINT: It is not capitalized....spell it correctly. Don't add an "s")

Labeling

Label the parts

Drag labels to their correct position on the image

Cable

Tower

Open Ended

What force is important to keep the cable tower stable and prevent it from swaying or toppling? (the answer is on page 35 in the What's happening section)

Build the Cable Stayed Bridge
Page 40 -42

​​Cable Stayed Bridge

Build the Suspension Bridge
Page 36-39

​​Suspension Bridge

​Choose one of the bridges below to build
Do not build both!

Multiple Choice

Which bridge is better at spanning long distances?

• Suspension

• Cable Stayed

• Arch

• Beam

Labeling

Label the different loads on the Skyscraper

Drag labels to their correct position on the image

snow load

wind load

earthquake load

Water and Pressure

Occupancy

Gravity Load

Match

Match the correct Skyscraper type to its definition. (pg. 44)

• Oldest type of skyscraper with steel frame and 30 stories

• Has trusses added to the frame and can rise to a height og 60 stories

• this system started being used in the mid 1900's. It resists lateral loads by acting like a cantilever sticking out from the ground.

• By the early 2000's, 160 floors or more possible because of the braced frames with trusses every 10-20 stories

Rigid Frame

Frame with Shear Truss

End Channel Framed Tube

Super Frame

• Rigid Frame

• Frame with Shear Truss

• End Channel Framed Tube

• Super Frame