main project sponsors and contributors
DESCRIPTION
Main Project Sponsors and Contributors. Steve Mahin, UC Berkeley Jos é I. Restrepo, UC San Diego Ian Buckle, UN Reno Matthew J. Schoettler, UC San Diego Francesco Carrea, UC San Diego David Duck, UC San Diego Gabriele Guerrini, UC San Diego Elide Pantoli, UC San Diego - PowerPoint PPT PresentationTRANSCRIPT
Main Project Sponsors and ContributorsMain Project Sponsors and Contributors
Research Team Blind Prediction CommitteeResearch Team Blind Prediction Committee• Steve Mahin, UC Berkeley• José I. Restrepo, UC San Diego• Ian Buckle, UN Reno• Matthew J. Schoettler, UC San Diego• Francesco Carrea, UC San Diego• David Duck, UC San Diego• Gabriele Guerrini, UC San Diego• Elide Pantoli, UC San Diego• Mike Keever, Caltrans• Mark Mahan, Caltrans• Cliff Roblee, Caltrans• Tom Shantz, Caltrans• Phil Yin, FHWA
• Steve Mahin, Chair• José I. Restrepo• Vesna Terzic, UC Berkeley• Matthew J. Schoettler
NEES@UCSD & UCSD PersonnelNEES@UCSD & UCSD Personnel• Dan Radulescu• Andy Gunthardt• Robert Beckley• Darren McKay• Steve Morris• Lony Rodriguez• Alex Sherman• Jeff Rivor• Brad Durant• Matteo Orio
Overall Objectives of the Test ProgramOverall Objectives of the Test Program
• Observe and document the nonlinear dynamic response up to collapse of a full-scale bridge column designed as per Caltrans SDC
• Observe scale effects with shake table testing of columns being carried out at UC Berkeley
• Landmark test offering practitioners and researchers the chance to blindly predict the response of the test structure, to investigate epistemic uncertainty in nonlinear modeling and to enhance future modeling techniques
Test Specimen Features and InstrumentationTest Specimen Features and Instrumentation
• 4ft diameter by 24 ft tall column• 260 ton inertial mass• 272 sensors sampled at 240 Hz• 3 GPS-50 Hz differential stations
August 4 September 2856 days
Blind Prediction Earthquake SequenceBlind Prediction Earthquake SequenceLoma Prieta 1989 Kobe 1995
Design EQ
LP
EQ5 Takatori (80%)EQ5 Takatori (80%)
Blind Prediction DataBlind Prediction Data
Measured unit weight: 150 pcf
Stress- Strain Relationship #11 Bar (US Cust. Units)
0
20
40
60
80
100
120
0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14
Strain
Stre
ss (k
si)
Concrete
Hoops
Longitudinal Reinforcement
QuestionnaireQuestionnaireNOTE: Values should be reported in absolute termsNOTE: y=0.0 is at the platen surface
1 Relative horizontal displacement (mm) at level 6: y=8.534-m: EQ1 EQ2 EQ3 EQ4 EQ5 EQ6Maximummaximum
2 Total horizontal acceleration (g) at level 6: y=8.534-m: EQ1 EQ2 EQ3 EQ4 EQ5 EQ6Maximummaximum
3 Bending moment (kN-m) at level 0: y=1.219-m: EQ1 EQ2 EQ3 EQ4 EQ5 EQ6Maximummaximum
4 Shear force (kN) at level 0: y=1.219-m: EQ1 EQ2 EQ3 EQ4 EQ5 EQ6Maximummaximum
5 Average curvature (rad/km) between y = 1.270 and 1.473 m EQ2 EQ3 EQ4 EQ5 EQ6Maximummaximum
6 Average axial strain (x106) between y = 1.270 and 1.473 m EQ2 EQ3 EQ4 EQ5 EQ6Maximummaximum
7 Relative residual displacement (mm) at level 6: y=8.534-m: EQ2 EQ3 EQ4 EQ5 EQ6
8 Largest column compressive axial force (kN)at level 0: y=1.219-m: EQ1 EQ2 EQ3 EQ4 EQ5 EQ6
9 Mode of failure (type corresponding number):1: None
Specify if "Other": 2: Column shear failure3: Column longitudinal bar anchorage failure4: Column hoop fracture5: Column longitudinal bar fracture6: Other
Predicted Quantitiy
• Two Categories: Researchers and Engineering Professionals• 41 entries from 14 countries
ResponsesResponses
0 1 2 3 4 5 6 70
100
200
300
400
500
600
700
800
EQ number
max
hor
izon
atal
dis
plac
emnt
[m
m]
Experiment
Winner-RWinner-EP1
Winner-EP2
Max
. D
ispl
acem
ent
(mm
)
0 1 2 3 4 5 6 70
0.2
0.4
0.6
0.8
1
1.2
EQ number
max
acc
eler
atio
n (g
)
Experiment
Winner-RWinner-EP1
Winner-EP2
ResponsesResponsesM
ax.
Tot
al A
ccel
erat
ion
(g)
0 1 2 3 4 5 6 70
2000
4000
6000
8000
10000
12000
14000
EQ number
max
ben
ding
mom
ent(kN
-m)
Experiment
Winner-RWinner-EP1
Winner-EP2
ResponsesResponsesM
ax.
Ben
ding
Mom
ent
(kN
-m)
0 1 2 3 4 5 6 70
1000
2000
3000
4000
5000
EQ number
Max
com
pres
sive
axi
al for
ce (kN
)
Experiment
Winner-RWinner-EP1
Winner-EP2
ResponsesResponses
Max
. A
xial
Com
pres
sion
(kN
)
Static
Blind Prediction WinnersBlind Prediction Winners
• Researchers: ………………………………………………
• Eng. Professionals:………………………………………………
………………………………………………
Zhe Qu, Tokyo Institute of Technology, Japan
Bill Tremayne, Holmes Culley, San Francisco
Lawrence Burkett, Rutherford & Chekene, San Francisco
Certificates of DistinctionCertificates of Distinction
• António Arêde & team, University of Porto, Portugal• Otton Lara & team, Escuela Superior Técnica del Litoral, Ecuador• Farzin Zareian & team, UC Irvine
Engineering Professionals
Researchers
• Eric Kelley, Parsons Brinckerhoff, Inc.• Andreas Schellenberg, Rutherford & Chekene
EQ8: Takatori 100%EQ8: Takatori 100%