Transcript Older Nonductile Concrete Buildings

“In the next major
quake, the largest
number of casualties
will occur in older
concrete buildings.”
Older
Nonductile
Concrete
Buildings
2006 San Francisco
Earthquake Scenario
Charles Kircher
PEER is contributing to the solution through…
Research
Column shear failure
P/Ag f ’c
Models
FEMA 356 (non-conforming)
0.8
Proposed, (r” ≤ 0.0005)
0.6
Proposed, (r” ≥ 0.006)
0.4
0.2
0
Column axial failure
P/Ag f ’c
Experimental and
analytical studies
produce data for
development of
models. See PEER
Reports, Digests,
and Online
Databases.
1.0
0.8
FEMA 356 (non-conforming)
0.6
Proposed, (r” ≤ 0.0005)
Proposed, (r” ≥ 0.006)
0.4
0.2
Improved
models and
acceptance
criteria can
save millions
of dollars in
retrofitting
costs. See
ASCE/SEI 41
Supplement 1.
0
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
plastic rotation (rad)
Simulation
Improved simulation
capabilities help
identify the truly
vulnerable buildings
from within the
large building stock.
See OpenSees.
berkeley.edu.
Concrete
Coalition
Advocacy
EERI, PEER, and
others are
collaborating on an
initiative to
promote risk
reduction in older
concrete buildings.
See Concrete
Coalition web site.
The Pacific Earthquake Engineering Research Center
headquarters at the University of California, Berkeley
for more information see http://peer.berkeley.edu
Poster by K. Elwood (UBC) and J. Moehle (UCB)