Download Workshop 2012 slides lecture

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WELCOME!
2012 Earthquake
Engineering Workshop
Stanford
University
State University of
New York, Buffalo
University of New
Hampshire
California State University,
Sacramento
INTRODUCTIONS
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Vandalist Kith
Undergraduate Research Assistant
Sacramento State
Nelson Tejada
Undergraduate Research Assistant
Sacramento State
Nathan Canney
PhD Student
University of Colorado, Boulder
Workshop Format
Morning:
Learn earthquake engineering concepts
Build structures
Afternoon:
Test structures
Learn advanced earthquake engineering concepts
•Interactive group work for most of the activities
•Stay involved! Ask lots of questions if you don’t understand!
•Be prepared to be asked questions (all engineers are asked tough questions)
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Group 1
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2012 Earthquake
Engineering Workshop
Stanford
University
State University of
New York, Buffalo
University of New
Hampshire
California State University,
Sacramento
Group 2
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2012 Earthquake
Engineering Workshop
Stanford
University
State University of
New York, Buffalo
University of New
Hampshire
California State University,
Sacramento
Group 3
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2012 Earthquake
Engineering Workshop
Stanford
University
State University of
New York, Buffalo
University of New
Hampshire
California State University,
Sacramento
Group 4
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2012 Earthquake
Engineering Workshop
Stanford
University
State University of
New York, Buffalo
University of New
Hampshire
California State University,
Sacramento
Group 5
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2012 Earthquake
Engineering Workshop
Stanford
University
State University of
New York, Buffalo
University of New
Hampshire
California State University,
Sacramento
Group Activity!!
In your groups:
Find one thing everybody has in common in the group…
Report back in 5 minutes
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Group Activity!!
Before we start shaking our buildings, let’s make sure they
can stand up under a load:
•Using paper and masking tape, build
the strongest structure you can.
•The paper structure must be at least 6
inches tall and it will be loaded with
books
•Be creative!!
15 minutes
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Earthquake Engineering
Why is it important?
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Example 1
Example 2
We seek to understand what happens to structures
during earthquakes
(so we can better design them for the next earthquake)
Earthquake Engineering
Mechanical
Geotechnical
Chemical
Civil
Environmental
Structural
Electrical
Transportation
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Computer
Water Resources
Understanding Earthquakes
We first need to understand the EARTH:
Why does the crust move?
COLD!!!
HOT!!!
25 miles deep
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Tectonic Plates = “Pieces of the Crust”
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Plate
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Plate
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Plate
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Plate
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Plate
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Plate
Earthquake Locations
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Activity #2:
Name the continental plates on the map
5 minutes!!
Tectonic Plates = “Pieces of the Crust”
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6 Continental Plates (14 sub-continental plates)
Eurasia
Plate
America
Plate
Pacific
Plate
Africa
Plate
Australia
Plate
Antarctic
Plate
Earthquake Locations
Earthquakes Can Be Devastating
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Just 1 Magnitude 7.1
Earthquake
1906 San Francisco Earthquake (M=7.9)
We try to reduce earthquake damage by…
…Understanding exactly what happens
during earthquakes
…Using principles of math and
physics to figure out how the shaking
affects buildings and bridges
…Using intuition, reasoning, math,
and physics skills to design better,
earthquake resistant buildings
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Protecting Structures
How can we protect a building from an earthquake?
1. Make it STRONGER
2. Make it DEFORMABLE (DUCTILE)
3. ISOLATE the building
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Protecting Structures
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Make it STRONGER
Which structure is stronger? Why?
OR
Wood
Smaller members
Steel
Larger members
Protecting Structures
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Make it DEFORMABLE (DUCTILE)
Which material is more ductile? More brittle?
OR
OR
Brittle!!
Ductile!!
OR
Protecting Structures
ISOLATE the building
Which building would shake less?
Rubber
bearings
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Individual Activity
Earthquake engineering concepts
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1.) STABILITY:
Which structure is the worst design (least stable)? WHY?
Large weight
weight
Most flexible
columns
2.) PERIOD OF VIBRATION
Which structure will shake the fastest?
weight
columns
WHY?
Small weight
Least flexible
Designing K’Nex buildings
•1-bay structure
•Minimum height: 15”
•The base of the structure has to be
constructed with either a red or gray rod
•Hold specified weight (steel plates)
•Fill out the material pricing sheet and
calculate how much your structure cost
•The base connector must include a free
connection point straight down (see figure
below)
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