Yahya Kurama, Assistant Professor

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Shakes and Quakes An Engineer's View Part 2

• Yahya Kurama, Assistant Professor
• Richard Christenson, Graduate Student
• Tracy Correa, Graduate Student
• Gang Mei, Graduate Student
• Brian Morgen, Graduate Student

Andrew Jackson Middle School March 14, 2001
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STRUCTURES

• Structure any assemblage of materials which is
  intended to sustain loads
• Nearly every plant and animal, and nearly all
  works of man have to sustain forces without
  breaking, so practically everything is a
  structure of one type or another.

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Civil Structures
Civil Structures areBIG!
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Structural Loads

• Gravity loads (self weight, people, furniture,
  etc.)
• Earth and water pressure
• Wind loads
• Earthquakes

• Structures respond to these dynamic loads,
  moving, swaying, and .

SOMETIMES FAILING!
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Wind Excited Structures
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Wind Excited Structures
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Human Excited Structures
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Earthquake Excited Structures
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AUGUST 17, 1999 IZMIT EARTHQUAKE (M 7.4)
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SEISMIC ACTIVITY IN THE REGION
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(No Transcript)
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RIGHT-LATERAL STRIKE-SLIP FAULT (gt 1400 km)
E
W
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HORIZONTAL SLIP ALONG THE NAF
2 meters (6.6 feet)
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HORIZONTAL SLIP ALONG THE NAF
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HORIZONTAL SLIP ALONG THE NAF
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VERTICAL SLIP ALONG THE NAF
1.7 meters (5.6 feet)
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VERTICAL SLIP ALONG THE NAF
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REINFORCED CONCRETE BUILDINGS
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REINFORCED CONCRETE BUILDINGS
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WHICH FLOOR WOULD YOU RATHER LIVE IN?
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SOFT/WEAK STORY COLLAPSE
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REINFORCED CONCRETE BUILDINGS
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REINFORCED CONCRETE BUILDINGS
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HYGOKEN-NAMBU, JAPAN, 1994
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CHI-CHI, TAIWAN, 1999
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NORTHRIDGE, U.S., 1994
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NORTHRIDGE, U.S., 1994
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SEISMIC ISOLATION
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SEISMIC ISOLATION USING LEAD-RUBBER BEARINGS
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LEAD-RUBBER BEARING
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USC UNIVERSITY HOSPITAL - WITH ISOLATION
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USC UNIVERSITY HOSPITAL - WITH ISOLATION
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OLIVE VIEW HOSPITAL - WITHOUT ISOLATION
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OLIVE VIEW HOSPITAL - WITHOUT ISOLATION
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OLIVE VIEW HOSPITAL - WITHOUT ISOLATION
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• Civil Engineering has many interesting and
  challenging problems.
• Protecting structures against damaging winds and
  earthquakes is one of the important jobs of a
  civil engineer.

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National Science Foundation Scientists and
Engineers in the Schools Program
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U.S. Geological Survey
http//earthquake.usgs.gov/
http//wwwneic.cr.usgs.gov/
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On PBS
http//www.pbs.org/wgbh/buildingbig/
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Thanks for all of your hard work!