NEES 2012 Earthquake Engineering Workshop WELCOME! Stanford University State University of New York,...

NEES

2012 Earthquake Engineering Workshop

WELCOME!

Stanford

University

State University of

New York, Buffalo

University of New

Hampshire

California State University, Sacramento

NEES

NEES

INTRODUCTIONS

Vandalist Kith Undergraduate Research Assistant

Sacramento StateNelson Tejada Undergraduate Research Assistant

Sacramento StateNathan Canney PhD Student

University of Colorado, Boulder

NEES

Workshop Format

Morning:

Learn earthquake engineering conceptsBuild structures

Afternoon:

Test structuresLearn 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)

2012 Earthquake Engineering Workshop

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Stanford

University

State University of

New York, Buffalo

University of New

Hampshire

California State University, Sacramento

NEES

Group 1

2012 Earthquake Engineering Workshop

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Stanford

University

State University of

New York, Buffalo

University of New

Hampshire

California State University, Sacramento

NEES

Group 2

2012 Earthquake Engineering Workshop

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Stanford

University

State University of

New York, Buffalo

University of New

Hampshire

California State University, Sacramento

NEES

Group 3

2012 Earthquake Engineering Workshop

XXXXXXXXXXXXXXXX

Stanford

University

State University of

New York, Buffalo

University of New

Hampshire

California State University, Sacramento

NEES

Group 4

2012 Earthquake Engineering Workshop

XXXXXXXXXXXXXXXX

Stanford

University

State University of

New York, Buffalo

University of New

Hampshire

California State University, Sacramento

NEES

Group 5

NEESIn your groups:

Find one thing everybody has in common in the group…

Report back in 5 minutes

Group Activity!!

NEESBefore we start shaking our buildings, let’s make sure they can stand up under a load:

Group Activity!!

15 minutes

•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!!

NEESWhy is it important?

We seek to understand what happens to structures during earthquakes

(so we can better design them for the next earthquake)

Earthquake Engineering

Example 1

Example 2

NEESCivil

Geotechnical

Environmental

Structural

Transportation

Water Resources

Earthquake Engineering

Mechanical

Chemical

Electrical

Computer

NEESWe first need to understand the EARTH:Why does the crust move?

25 miles deep

COLD!!!

HOT!!!

Understanding Earthquakes

NEES

Earthquake Locations

???Plate

???Plate

???Plate

???Plate

???Plate

???Plate

Tectonic Plates = “Pieces of the Crust”

NEES

Activity #2:

Name the continental plates on the map

5 minutes!!

NEES

PacificPlate

AntarcticPlate

AmericaPlate

AfricaPlate

EurasiaPlate

AustraliaPlate

6 Continental Plates (14 sub-continental plates)

Tectonic Plates = “Pieces of the Crust”

Earthquake Locations

NEES

1906 San Francisco Earthquake (M=7.9)

Just 1 Magnitude 7.1Earthquake

Earthquakes Can Be Devastating

NEES…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

We try to reduce earthquake damage by…

NEESHow can we protect a building from an earthquake?

Protecting Structures

1. Make it STRONGER2. Make it DEFORMABLE (DUCTILE)3. ISOLATE the building

NEESMake it STRONGER

Protecting Structures

Which structure is stronger? Why?

WoodSmaller members

SteelLarger members

OR

NEESMake it DEFORMABLE (DUCTILE)

Protecting Structures

Which material is more ductile? More brittle?

OR

OR

OR

NEESISOLATE the building

Protecting Structures

Which building would shake less?

Rubberbearings

NEES

Individual Activity

Earthquake engineering concepts1.) STABILITY:Which structure is the worst design (least stable)?

columns

weight

2.) PERIOD OF VIBRATIONWhich structure will shake the fastest?

columns

weight

WHY?Large

weightMost

flexible

WHY?Small

weightLeast

flexible

NEES

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)