2013 EERI Annual Meeting Session: School Seismic Safety

1. 1
B.C. School Retrofit Program
$2.5 billion project
+
$ 7m research program
at
University of British Columbia
Kyoto Seminar 12-14 Jan 2010 Liam Finn

2. 2
New Ideas for Economic Retrofit
Deaggregation of hazard
Performance – based design with drift ratio
performance criterion
IDA analyses of 31 generic school models
9m nonlinear analyses conducted
Seismic performance calculator to access data
Toolbox of retrofit options
Kyoto Seminar 12-14 Jan 2010 Liam Finn

3. Context
• BC’s population:
4.4 million
• More than 800
schools in BC’s
seismic risk areas
• 80% of the
schools located in
high seismic risk
areas (Victoria
and Vancouver)

4. Methodology - Motions
Earthquakes in Similar Tectonic Settings
California Peru & Chile Washington
Mexico Japan Central-America

5. Methodology - Motions
Characteristic Motion Histories
0.3
a)
Crustal
0
-0.3
0.3
b) Time (Sec)
Subcrustal
Acceleration (g)
0
-0.3
0.3
c) Time (Sec)
Subduction
0
-0.3
0 10 20 30 40 50 60 70 80 90 100
Time (sec)

6. Methodology - Basics
Guidelines Objective:
Probability of Damage High Probability of
Collapse
Inter-storey
Drift
Deformation
Aleatory
Demand

7. Buildings – LDRS
Modeling
School Building
Shear Spring Model

8. Site Conditions Site Class D
Dense soil and Soft Rock
Liquefiable Soil Site Class E

9. Methodology - Calculator

10. School Instrumentation
Objectives:
Provide early warning of quake
Improve quality and speed of post-earthquake damage
assessment to ensure early access to safe schools
1. 4 instruments per school for seismic response data.
Reports to server at UBC
Passive on site storage
2. 1 Free field instrument linked to early warning
network

11. Acknowledgement
1. Professor Carlos Ventura and Professor Liam Finn
2. UBC research team
 Dr. Freddy Pina
 Dr. Mehrtash Motammedi
 Bishnu Pandey
 Manuel Archila
 Jose Centeno
3. British Columbia Ministry of Education
4. Association of Professional Engineers and
Geoscientists of British Columbia (APEGBC), Peter
Mitchell (Project manager)
5. Peer review committee
 Robert Hanson (FEMA  John Sherstobitoff (Ausenco Sandwell)
 Farzad Naeim (John A. Martin&Associates)  Dr. Ron DeVall (RJC)
 Michael Mehrain (URS Corporation
 John Wallace (Genivar)
 Clint Low (Bosh, Bohman Partners)
 Dr. Timothy White(Bosh, Bohman Partners)

12. Thank you!