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PEER Tall Building Seismic Design Guidelines
Case Studies Performance Assessment
Jack P. Moehle Pacific Earthquake Engineering Research Center University of California, Berkeley
SEAW November 30, 2010
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TBI thanks Sponsors
CSSC – F. Turner, A. Sadre, D. McCarthy CalEMA City of LA Pankow Foundation
TBI Guidelines Development Team R. Hamburger, J. Moehle, Y. Bozorgnia, C.B. Crouse, R. Klemencic, H.
Krawinkler, J. Malley, F. Naeim, J. Stewart Designers
MKA – A. Fry, B. Morgen, J. Hooper, R. Klemencic REI – T. Ghodsi, J.S. Flores Ruiz, R. Englekirk, C. Massie, Y. Chen, E. Hoda,
M. Bravo, K. Lee SGH – A. Dutta, R. Hamburger
Analysts URS/SCEC – P. Somerville UCB/UBC – T. Yang, J. Moehle, Y. Bozorgnia UCLA – J. Wallace, Z. Tuna UCI – F. Zareian, P. Zhong, P. Jones
Loss Studies ATC 58 – R. Hamburger, J. Hooper, P. Morris, T. Yang, J. Moehle RMS – N. Shome, M. Rahnama, P. Seneviratna; H. Aslani
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1.5Km, Puente Hills
7.3Km, Hollywood
8.8Km, Raymond
11.5Km, Santa Monica
24.5Km, Elsinore
40.0Km, Sierra Madre
56Km, San Andreas
Sierra Madre (San Fernando)
Sierra Madre (Cucamonga)
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All the usual challenges for tall buildings Long fundamental period Multiple contributing periods
… and more Three different buildings Interest in extreme hazard (> 2500-year
return period
Record selection and scaling
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Response Spectra SLE25 (25 year)
0.2T
1
1.5T
1
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Response Spectra SLE43 (43 year)
0.2T
1
1.5T
1
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Response Spectra DBE (475 year)
0.2T
1
1.5T
1
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Response Spectra MCE (2475 year)
0.2T
1
1.5T
1
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Response Spectra OVE (4975 year)
7 unscaled pairs are from simulated motions (URS/SCEC)
0.2T
1
1.5T
1
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Rec Sim Med Target
Period
Sa(T)
Response Spectra OVE (4975 year)
0.2T
1
1.5T
1
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42-story reinforced
concrete core wall
42-story reinforced
concrete dual system
40-story steel special
moment-frame
Three Building Systems
Performance-based design guideline for tall buildings
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1A: Code 1B: PBEE 1C: PBEE+
T1EW = 5.2 sec T1EW = 4.8 sec T1EW = 4.6 sec
24” 24” 28” 28” 32” 32”
Building Design Comparison
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42-story reinforced
concrete core wall
42-story reinforced
concrete dual system
40-story steel special
moment-frame
Three Building Systems
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Building 2B – Inter-story drifts in H1 direction
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42-story reinforced
concrete core wall
42-story reinforced
concrete dual system
40-story steel special
moment-frame
Three Building Systems
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Bldg. 3A Bldg. 3B Bldg. 3C T1NS = 5.3sec T1NS = 6.5 sec T1NS= 5.7 sec
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MAXIMUMIDR
N‐S E‐W
E‐W N‐S
median
%16thand%84th
Individualearthquake
Building3A4975(years)
ReturnPeriod
OVE
MCE
DBE
SLE43
SLE25
GMset
2475(years)
475(years)
43(years)
25(years)
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MAXIMUMIDR
median
Individualearthquake
4975(years)
ReturnPeriod
OVE
MCE
DBE
SLE43
SLE25
GMset
2475(years)
475(years)
43(years)
25(years)
%16thand%84th
N‐S E‐W
E‐W N‐S Building3B
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MAXIMUMIDR
median
Individualearthquake
4975(years)
ReturnPeriod
OVE
MCE
DBE
SLE43
SLE25
GMset
2475(years)
475(years)
43(years)
25(years)
%16thand%84th
N‐S E‐W
E‐W N‐S Building3C
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Cost and Benefit Studies Construction Costs
Detailed building take-offs
Loss Calculations Generic approach
Conventional loss assessment based on inter-story drift and floor acceleration results
Similar components in all buildings.
Detailed ATC 58 approach Detailed building inventories Detailed losses based on ATC 58 fragilities and consequence
functions
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Construction costs (under review)
Building 1 Building 2 Building 3 Design
A
B
C
$223M
$222M
$227M
$237M
$237M
$237M
$355M
$340M
$345M
Source:
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After: Nilesh Shome
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After: Nilesh Shome
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ATC 58 repair costs
EDP
0.0
0.5
1.0
0 1 2 3 4 5 6 EDP = story drift
Prob
abili
ty y0 y1 y2
y3
Unit Cost, $
Quantity
Ci
Qi
Total Cost
Hazard level
50/50
10/50
5/50
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Core Wall – Building 1C – 25yrs
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Core Wall – Building 1C – 43yrs
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Core Wall – Building 1C – 475yrs
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Core Wall – Building 1C – 2475yrs
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Core Wall – Building 1C – 4975yrs
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Core Wall – Building 1A
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Core Wall Losses $
$
$
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PEER Tall Building Seismic Design Guidelines
CB Crouse Ron Hamburger John Hooper Jack Moehle
SEAW November 30, 2010