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

Shake Table Training Workshop 2015 – San Diego, CA2NHERI @ UCSD Workshop, 13-14 December, 2018 2

NHERI@UCSD Payload Opportunities

https://ucsd.designsafe-ci.org/payload-projects/

Shake Table Training Workshop 2015 – San Diego, CA3NHERI @ UCSD Workshop, 13-14 December, 2018 3

Sample Payload Opportunity

• Project Description

• Test Schedule

• Project PI Contact Information

Shake Table Training Workshop 2015 – San Diego, CA4NHERI @ UCSD Workshop, 13-14 December, 2018 4

Wind Turbine Testing (PI: A. Elgamal)

Funding Source of NHERI

Payload Projects:

• NSF

• Non-NSF

Shake Table Training Workshop 2015 – San Diego, CA5NHERI @ UCSD Workshop, 13-14 December, 2018 5

Testing at Powell Structures Laboratory

Shake Table Training Workshop 2015 – San Diego, CA6NHERI @ UCSD Workshop, 13-14 December, 2018 6

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

Shake Table Training Workshop 2015 – San Diego, CA7NHERI @ UCSD Workshop, 13-14 December, 2018 7

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

Shake Table Training Workshop 2015 – San Diego, CA8NHERI @ UCSD Workshop, 13-14 December, 2018 8

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

Shake Table Training Workshop 2015 – San Diego, CA9NHERI @ UCSD Workshop, 13-14 December, 2018 9

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

Shake Table Training Workshop 2015 – San Diego, CA10NHERI @ UCSD Workshop, 13-14 December, 2018 10

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