Current Activities at the MUST-SIM Facility

NEEShub Site Visit to UIUC

July 23, 2010

Dan Kuchma, Greg Pluta,

Thomas Frankie, and Aditya Bhagath

Illinois NEES Facility

Department of Civil and Environmental Engineering

University of Illinois

Content of Presentation

CABER Project– 3-Pier Simulation– Test Structure– Hybrid Testing

EOT Efforts– Shear-Torsion Interaction– Data-Rich Video Production– Access Portal

Limitations of Hybrid Simulation

Only relatively simple systems to date– Structures and earthquakes are 3D

Loading is generally simplified– True actions are complex 6DOF load and boundary

conditions

Earthquake Excitation

gx

Simple Bridge Model

27.215 m 23.700 m 32.260 m 30.795 m

6.085 m6.575 m 6.085 m

Courtesy of National Taiwan University

NEES CABER Project

Curved Bridge with 3 Piers– 2 Large Scale Piers– 1 Small Scale Pier

Considerations– Curved/skewed– Uneven spans/heights– Soil/foundation interaction– Multi-directional motions

gx gx

Details of Structure

To be tested using

LARGE scale LBCBs

To be tested using

LARGE scale LBCBs

To be tested using

SMALL scale LBCBs

28.5

ft

37.5

ft

22.5

ft

Abut 1 Abut 2

75 ft

100 ft

Bent 1

Bent 2

Bent 3

75 ft

150 ft

75 ft

R = 660ftBox Girder section

Cap beam section

Data Acquisition

Traditional – 244 Channels– 152 Strain Gages– 56 Linear Potentiometers– 24 String Potentiometers– 12 LVDTs

Krypton– 50 LEDS

Cameras– 5 High Resolution Still Cameras– 1 High Resolution Video Camera– 1 Telepresence Camera

Control Instrumentation

Specimen Fabrication

Small Scale Specimen Validation

Finite Element Analysis

Z

Y

X

Z

Y

X

ZY

X

Loading on Structure

Sequence of Imposed Records– Level 1 (cracking)– Level 2 (yielding)– Level 3 (design level)– Level 4 (failure)

0 1 2 3 4 5P erio d (sec )

0

0 .5

1

1 .5

2

2 .5

3

Spe

ctra

l Acc

eler

atio

n (i

n)

0 1 0 2 0 3 0 4 0T im e (sec )

-1

-0 .5

0

0 .5

1

Acc

eler

atio

n (g

)

Hybrid Simulation

Computational component

{u}{u}

{F}{F}

Measure forces

gxSimulation Coordinator

Experimental component

FzFzMyMy

MyMyFyFy

FxFxMxMx

Target Disp.

Measured

forces

Calc Forces

EOT Efforts

Creation of Modular Videos Shear-Torsion Interaction selected as test case Portal to Access Videos, Data, and Activities Education Outreach and Training

– K-12– Freshmen Level– Senior/Grad Level– Researchers– Practitioners

Experimental Test Case

Tests on 5 small piers

Test No.

Shear Component

(%)

Torsional Component

(%)

1 100 0

2 75 25

3 50 50

4 25 75

5 0 100

Experimental Results

Displaying Response

Interaction Effects

Video Production Sequence

Script written over several iterations– Detailed subsections– Detailed directions for video editing

Visual components– Test videos created in Matlab– Powerpoint images and animations– CAD drawings– Internet images

Review and voice over by professional speaker Video created in Adobe Premiere in 1080p

Steps

Video Production Sequence

Matlab-Generated Video

Video Production Sequence

Video Created in Adobe Premiere

Online Portal

Potential Framework

NEES researchers create first draft of video scripts and images, animations, and clips and then submit to NEEScomm for review and comments

NEEScomm arranges for voice over and produces videos

Learning modules formed from videos and test data Videos, metadata, and activities are provided in the

Portal format

Next Steps

Continue iterations to refine current video; produce video components for reaching a variety of audiences

Create teaching module(s) with video segments and access to structural details and test data

Revise and update interface of Portal Explore frameworks for creating videos/modules: Listen and respond to feedback

Closure

"In the examination of physical problems I begin by making a few experiments, because it is my desire to state the problem after I have had the experience of it . . . we must commence with experience, and strive by means of it to discover truth.“

Leonardo da Vinci 1452 – 1519

Questions?