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Shake Table Training Workshop 2015 – San Diego, CANHERI @ UCSD Workshop, 13-14 December, 2018
Payload Opportunities
Chia-Ming Uang, Professor
Director, Powell Structures Labs
University of California, San Diego
December 13, 2018
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NHERI@UCSD Payload Opportunities
https://ucsd.designsafe-ci.org/payload-projects/
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Sample Payload Opportunity
• Project Description
• Test Schedule
• Project PI Contact Information
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Wind Turbine Testing (PI: A. Elgamal)
Funding Source of NHERI
Payload Projects:
• NSF
• Non-NSF
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Testing at Powell Structures Laboratory
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Payload Project PI Responsibilities
➢Contact Existing Project PI
➢Both PIs to Inform NHERI Network Coordination Office
➢Both PIs to Inform NHERI@UCSD Site Operations
Manager for Approval of Technical Feasibility/Safety
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Seismic Collectors in Steel Building Structures
➢ University of Arizona: R. Fleischman (PI)
➢ Lehigh University: R. Sause & J. Ricles (co-PIs)
• Large-scale Component Tests
➢ UCSD: C.-M. Uang (co-PI): Shake Table Testing
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ChallengePrototype Building Test Frame
i-th floor abs. acc
ሷ𝒖𝒈∗
✓Reproduce i-th Floor Acc. History
in an Elastic One-story Test
Frame
?
ሷ𝒖𝒊𝒕ሷ𝒖𝒊
𝒕
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Target Test Frame Response
ሷ𝒖𝒈∗
One-story Test
Frame
??
Find:
ሷ𝒖𝒈∗ 𝝎 =
ሷ𝒖𝟑𝒕 𝝎
𝑯 𝝎
ሷ𝒖𝟑𝒕 𝝎Elastic SDOF system
for SDOF system
ሷ𝒖𝟑𝒕 𝒕
ሷ𝒖𝒈∗ 𝝎 ሷ𝒖𝒈
∗ 𝒕
FFT
iFFT
ሷ𝒖𝒕∗ = ሷ𝒖𝟑𝒕
𝑯 𝝎 =ሷ𝒖𝒕∗ 𝝎
ሷ𝒖𝒈∗ 𝝎
ሷ𝒖𝒕∗
𝒖𝐚𝐧𝐝
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Collector Joint Rotation Angles
A
B C E
D
C
DA
B E
𝜽𝑪
𝜽𝑺
𝜽𝑬
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Collector Joint Rotation Amplification: Modification 1
Insert a Pin Connection
Gravity ColumnA
B C E
D
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H’ =2.5’H
=6.5’
L = 5’
L = 10’
collectors
LFRS
𝒖∗𝜽∗
A
B C
Collector Joint Rotation Amplification: Modification 2
DShorter
Column
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3@10'1'
1'
1'
10'
10'
5' 1'
Trial Test Frame Design
H’ =2.5’H =6.5’
31/4” NWC + 3” Steel Deck
W12x136
W18x97
W10x60 W10x60 W10x60 W10x60 W18x35 W18x35 W18x35
T1 = 0.20 s
ELEVATION
PLAN
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Test Data/Publication Issue
➢ Coordination with Existing Project PI