yahya kurama, assistant professor richard christenson, graduate student tracy correa, graduate...

Yahya Kurama, Assistant ProfessorYahya Kurama, Assistant Professor

Richard Christenson, Graduate StudentRichard Christenson, Graduate Student

Tracy Correa, Graduate StudentTracy Correa, Graduate Student

Gang Mei, Graduate StudentGang Mei, Graduate Student

Brian Morgen, Graduate StudentBrian Morgen, Graduate Student

Andrew Jackson Middle SchoolAndrew Jackson Middle SchoolMarch 14, 2001March 14, 2001

• 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.

BuildingsDams

Tunnels

Bridges

DomesCivil Structures are

BIG!

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

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

AUGUST 17, 1999 IZMIT EARTHQUAKE (M 7.4)

SEISMIC ACTIVITY IN THE REGION

RIGHT-LATERAL STRIKE-SLIP FAULT (> 1400 km)

EE

WW

HORIZONTAL SLIP ALONG THE NAF

2 meters(6.6 feet)2 meters(6.6 feet)

HORIZONTAL SLIP ALONG THE NAF

HORIZONTAL SLIP ALONG THE NAF

VERTICAL SLIP ALONG THE NAF

1.7 meters (5.6 feet)1.7 meters (5.6 feet)

VERTICAL SLIP ALONG THE NAF

REINFORCED CONCRETE BUILDINGS

REINFORCED CONCRETE BUILDINGS

WHICH FLOOR WOULD YOU RATHER LIVE IN?

SOFT/WEAK STORY COLLAPSE

REINFORCED CONCRETE BUILDINGS

REINFORCED CONCRETE BUILDINGS

HYGOKEN-NAMBU, JAPAN, 1994

CHI-CHI, TAIWAN, 1999

NORTHRIDGE, U.S., 1994

NORTHRIDGE, U.S., 1994

SEISMIC ISOLATION

SEISMIC ISOLATION USING LEAD-RUBBER BEARINGS

LEAD-RUBBER BEARING

USC UNIVERSITY HOSPITAL - WITH ISOLATION

USC UNIVERSITY HOSPITAL - WITH ISOLATION

OLIVE VIEW HOSPITAL - WITHOUT ISOLATION

OLIVE VIEW HOSPITAL - WITHOUT ISOLATION

OLIVE VIEW HOSPITAL - WITHOUT ISOLATION

• 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.

National Science Foundation Scientists and Engineers in the Schools Program

http://http://earthquake.usgs.gov/earthquake.usgs.gov/

U.S. Geological Survey

http://http://wwwneic.cr.usgs.gov/wwwneic.cr.usgs.gov/

On PBSOn PBS

http://www.pbs.org/wgbh/http://www.pbs.org/wgbh/buildingbig/buildingbig/